We’re building an AI chat platform where humans and AI interact in group chats, voice, and video.
Small team, high ownership, ship fast. We talk to users and build things we actually use.
We’re looking for a fullstack engineer to build product features end-to-end.
What you’ll do: - Build and ship features across frontend and backend - Work on real-time chat, onboarding flows, and AI interactions - Own features from idea → production - Collaborate closely with design and iterate quickly
Tech stack: React / Next.js, Python, real-time systems
Looking for: - Strong fullstack experience - Product mindset (you care about UX, not just code) - High agency - you move fast and take ownership
Apply: https://shapes.inc/jobs Checkout what we are building on https://talk.shapes.inc/
We are seeking a visionary, and experienced Director of Developer Experience (DevX) to lead our global customer experience efforts. In this leadership role, you will be the strategic advocate and driver for ensuring our merchants and partners experience a world-class platform integration. You are instrumental in shaping the developer journey, ensuring that integrating with Adyen is not just easy, but a genuinely superior experience.
You will live and breathe our public APIs, SDKs, and documentation. You will identify where developers face friction and then build the tools and shape the content to eliminate it. This is a role for a builder and a communicator who wants to have a direct, tangible impact and redefine the standard of integration for thousands of developers worldwide.
4 yrs production GenAI: AWS Bedrock RAG (92% recall, HIPAA), LangGraph multi-agent copilots shipped to prod, QLoRA/LLaMA 2 fine-tuning, LangChain/LlamaIndex, Python, Docker/K8s.
Co-author ACL 2024 (healthcare AI). MS Data Science UNT 2024. Currently ML Research Scientist @ Auburn (multi-agent VLMs).
Open to: Applied Scientist / ML Eng / GenAI Eng / AI Eng
Email: ksaimanikanta4@gmail.com GitHub: github.com/saikasireddy Resume: [https://docs.google.com/document/d/1pjp-I0XfRP96fxu-nbIdOAVQ...]
Job Requirements:
- 5+ years of professional experience as a software engineer
- Experience in fintech is an optional but major plus
- Familiarity with our tech stack (Golang, React through a Next.js app, GraphQL, PostgreSQL) is beneficial but not required
Why You’d Enjoy Working with Us:
- You're joining a small fast paced team: 12 engineers, 40 people total
- Direct impact on solving real-world problems for small businesses
- Hybrid work model with 2 days on-site in SF
- Competitive salary and benefits
If interested, please reach out at hn@userainbow.com with your resume attached to the email.
You can also visit our site to learn more: https://www.userainbow.com/about
High-priority technical roles in Engineering Leadership, Senior Cybersecurity Analyst, Infrastructure Engineering, Head of Continuity Product, and several more roles.
See all open roles and apply here >> https://www.radai.com/careers?utm_source=W29wy29rlJ
All currently open roles are on-site San Francisco.
Curie is a telehealth platform combining clinical expertise with AI to deliver personalized, accessible care — intelligent intake, treatment matching, and AI-powered tools for clinicians. Team includes ex-founders, clinicians, and engineers from Stanford, Harvard, UCLA, Berkeley, and AWS. Well-funded and growing fast.
We're hiring an AI Engineer to own the microservice layer powering our clinical AI: agentic intake workflows, RAG pipelines grounded in medical guidelines, session/memory management for long-running clinical agents, and HIPAA-grade observability and safety guardrails. You'll shape the AI architecture of a healthcare product from the ground up.
Stack: Langgraph, Langfuse, Go, Python, TS, GraphQL, gRPC/Connect-RPC, PostgreSQL, GCP/Vertex AI, AWS Bedrock.
Looking for: 5+ years engineering, meaningful production AI/ML experience, LLMs in production (prompting, structured output, evals), RAG and agentic patterns, comfort across Go + Python + cloud. Bonus: FHIR/HL7, fine-tuning, healthcare AI background, startup experience.
Apply: https://jobs.ashbyhq.com/curie/cea56a9a-d238-4101-a56c-f94a4...
Chestnut builds the systems insurance carriers actually run their distribution business on. We replace spreadsheets, legacy vendor systems, and manual processes with real-time data, deterministic workflows, and AI-assisted tooling.
This is end-to-end product engineering.
You won’t just write APIs. You’ll design schemas, build backend logic, ship UI, deploy to production, and handle the sharp edges that show up with real customers. The problems are messy and state-heavy: payouts that must reconcile with finance, onboarding flows with regulatory constraints, dynamic hierarchies, retries, chargebacks, partial failures.
We care a lot about correctness. These systems move real money and cannot drift.
Stack: Go, TypeScript/React, Postgres, Temporal, Kubernetes, AWS
We use AI heavily in our workflow — for drafting, refactoring, test generation, and exploring solutions. We expect engineers to use it aggressively. We also expect you to understand what it’s doing, spot when it’s wrong, and maintain strong fundamentals. Taste matters.
You’ll likely thrive here if you: - Have 3–6 years building real product systems - Are strong in at least one typed language and comfortable picking up others - Enjoy owning features end-to-end - Think in terms of invariants, edge cases, and failure modes - Like shipping quickly but cleanly - Want to build systems that operate in production, not demos
We’re a small, high-agency team. You’ll have meaningful ownership and direct impact on customers.
Hybrid in SF and Seattle.
Questions or want to sanity-check fit: nick [at] chestnutfi [dot] com
We built AI agents that do the whole thing: gather requirements in plain English, write the integration code, test it, deploy it, fix it when it breaks.
We have paying enterprise customers and more demand than we can keep up with.
You'd be the first engineering hire. Agent orchestration, durable execution runtime, self-healing infra, most of the important architectural decisions haven't been made yet.
The founders built a logistics startup from pre-seed to 400+ people. We've been dealing with broken integrations for years.
TypeScript, Effect, Bun, PostgreSQL, K8s, AWS. Paid work day. Under 2 weeks to offer.
work@ontemper.com, mention HN
We're hackers, researchers, and operators obsessed with building AI for electronic systems and semiconductors. Our team includes former Stanford professors, SAIL researchers, Olympiad medalists, and executives from Synopsys, GlobalFoundries, and Cadence. Despite the name drops, we care far more about execution than titles.
Apply here: https://jobs.ashbyhq.com/voltai.careers
We are Baseten, the team that powers mission-critical inference for the world’s most dynamic AI companies such as Cursor, Notion, OpenEvidence, Abridge, Clay, Gamma and Writer. We’re growing quickly and recently raised our $300M Series E, backed by investors including BOND, IVP, Spark Capital, Greylock and Conviction. By uniting applied AI research, flexible infrastructure, and seamless developer tooling, we enable companies operating at the frontier of AI to bring cutting-edge models into production.
Apply Here: https://jobs.ashbyhq.com/baseten?utm_source=gkzEP29VD4 or email Jason.dupree@baseten.co
We are hiring for multiple core roles:
1. Solution Architect: You will partner closely with sales and customers to translate business needs into technical solutions, run technical discovery, and guide repeatable deployments and proofs of value for customers. This role is a great fit for entrepreneurial, customer-facing technical professionals who want a front-row view into how modern companies adopt AI at scale, and who enjoy working across technical discovery, solution design, demos, deployment scoping, and hands-on customer implementations, in close partnerships with Sales and Engineering
2. AI Solutions Engineer/Forward Deployed Engineer: You will partner directly with customers to architect, build, and deploy high-scale production AI applications on Baseten’s platform. You’ll own the journey with customers from initial exploration to production deployment. To be clear, this is a technical engineering role with hands-on coding and software dev that also includes aspects of product management, technical customer success and pre-sales solutions engineering mixed in. We’re language agnostic but strong Python and ML experience is a big plus.
3. Customer Engineer: You'll partner closely with Solutions Architecture, SRE, Infra, Product, and Forward Deployed Engineering, but you own the customer outcome end-to-end: from first response to root-cause analysis to the follow-up that reinforces trust. This role blends deep infrastructure debugging, AI/ML performance expertise, incident command, and proactive account ownership. You'll triage and resolve issues across Kubernetes, GPUs, networking, and model serving, lead war rooms during P0 escalations, and translate recurring pain points into product improvements.
The Offer:
Compensation: Very competitive, we’re looking for folks with a breadth of experience
Equity: This is an opportunity to participate in the ownership of a fast-growing AI Infrastructure platform
Location: We are based out of San Francisco with offices in New York. We are also open to remote employees for these roles.
Process: If you’re interested, please apply here https://jobs.ashbyhq.com/baseten?utm_source=gkzEP29VD4 or email me direct at Jason.dupree@baseten.co
We let people embody machines from anywhere on the planet. Humanoids, drones, industrial arms -- if it moves, someone in a headset can be inside it, doing real work. You know how people remote into desktops? We do that, but for the physical world.
Team of 5 scaling to 10.
XR Engineer -- Build the interface between human input and robot movement. Hand/body tracking, gaze, controllers, spatial UI. Make teleoperation feel like teleportation, not a laggy video call. Experience with three.js, react-three/fiber and the pmndrs ecosystem is a big plus.
Full-Stack Engineer -- Product verticals end-to-end: data modeling, server routes, UI, real-time sync. Fleet management, operator scheduling, org tooling. TypeScript/React. Experience with sync engines or local-first architectures is a big plus.
Real-Time Engineer -- WebRTC internals, peer-to-peer data channels + video, connection lifecycle management in Go. Sub-frame latency with real consequences -- these are physical machines. If you've worked on real-time media infrastructure and want to apply it to something that actually moves, this is it.
We don't care about your title. We care that you can own a problem space end-to-end, move independently, and ship things that matter.
To apply: go to https://EvolveRobotics.com, find the contact form, and beat the game. If you can't get past Evo, this might not be the role.
- Product has caused customers to literally cry tears of joy
- Experienced eng team from Airbnb / Brex / LiveRamp
- Stack: TS, Postgres, React, GraphQL, and Next.js
Apply here: https://about.comulate.com/careers
Hiring:
- All Levels: AI Platform and Product Engineers
- Lead Product Designer
- Lead/Staff Product Managers
- Forward Deployed Engineers
- Software Engineer, AgentOps
- Lead Security Engineer
Apply here: https://www.fieldguide.io/careers?utm_source=HackerNews
We're building an AI platform for molecular discovery: think language models for protein and DNA design. Small founding team, moving fast, real ownership.
Looking for a lead platform engineer to own full-stack development across our Console, Builder, and Solutions apps. You'll ship agentic workflows for molecular design, build integrations with sequence/assay ordering providers, and help shape the technical direction of the platform.
Stack: Python, React, Node.js, AWS, Docker, REST/WebSockets. Bonus if you have experience with agentic systems or MCP. Interest in biology/bioinformatics a plus but not required. If you've shipped production systems end-to-end, have strong product instincts, and want to work on something at the intersection of AI and life sciences - we'd love to hear from you.
https://app.dover.com/apply/BioLM/12435b30-67f1-43c2-8c59-6d...
Apply here: https://jobs.ashbyhq.com/dimensional
Demos: https://x.com/stash_pomichter
--
Dimensional is the agentic operating system for generalist robotics.
The team is from MIT, CMU, Cornell, DJI, Figure, and has raised $200M+ for previous projects. Backed by the head of Apple Robotics, CEO of HuggingFace, cofounder of GoogleX, CTO of Windsurf, and more.
We launched recently and hit #3 trending on Github. Thousands of developers are now using Dimensional to program physical space.
We’re looking for relentless hackers across Software, Infra, Manipulation, Navigation, and LLM/Agents to join us in SF/Shenzhen to power the next generation of agentive robotics.
We’re building a healthier future for women and children. We combine clinical excellence, human connection, and proactive technology to ensure our patients get the care they deserve, from preconception through midlife.
Hiring: Staff Software Engineer, Patient Experience: https://grnh.se/ws5ijibc4us Staff Data Scientist, Growth: https://grnh.se/1tz2tcfw4us
See more opportunities at pomelocare.com/careers
30 cents of every behavioral health dollar in the U.S. is wasted — on ineffective care, administrative overhead, and outright fraud. Onos fixes this by ensuring every healthcare dollar goes toward high quality care.
Our AI platform helps health plans identify where care is going wrong, get members on the right clinical pathway, catch fraud and abuse, and automate reviews that clinical teams currently do by hand. We're well funded by top healthcare investors and live with some of the nation's largest health plans.
Stack: Python/Django, Next.js/TypeScript, PostgreSQL, AWS (Bedrock, ECS, Glue, S3). We ship with Claude Code and CodeRabbitAI.
Hiring:
- Staff Software Engineer (AI) — LLM pipelines for clinical note extraction, level-of-care classification, eval frameworks - Lead Engineer (Backend) — clinical workflow engine, AI/ML pipeline integration, multi-tenant architecture - Lead Engineer (Data/Integrations) — payer data pipelines, EDI X12/FHIR/HL7, claims feed infrastructure
All roles: https://onoshealth.com/career Email: [joinus@onoshealth.com](mailto:joinus@onoshealth.com) (mention HN)
Eagle is building Pixar for the built environment.
Backed by Lightspeed Venture Partners, we acquire and transform civil, structural, and MEP engineering firms with applied AI.
We believe that the world needs more engineers to work on problems in the physical world, and that's why we're going on this journey. We exist so that our people can express creativity and joy in serving the built world.
In 10 years, our ambition is to be the most valuable, talent-dense engineering firm in the U.S.
Apply here: https://jobs.ashbyhq.com/eagle/ef7cb145-536a-4ace-b6de-c8928...
Contact me if you're interested - alex@northstar.security
Weave Bio has developed an AI-native platform to help research and discovery scientists get through the FDA regulatory submission process faster.
- Senior Backend Engineer (python/django)
- Senior Frontend Engineer (react.js)
- Staff Backend Engineer (python/django)
- Staff Frontend Engineer (react.js)
- Senior Product Designer (storybook, figma)
- Senior Technical Product Manager (biotech, B2B SaaS)
- Operations Specialist, Customer Experience (CX)
Please apply here: https://job-boards.greenhouse.io/weave
San Francisco (SF), Hybrid/Onsite 3 days/week (Tues/Wed/Thurs)
We are building the next generation of infrastructure for AI without Docker containers, but with a better container technology based on WebAssembly!
We are hiring for:
* Rust Engineer (Remote, EU timezone) * Rust Distributed Engineer (Remote, EU timezone) * Developer Education Engineer (Office, San Francisco) https://www.workatastartup.com/companies/wasmerAdaptive is building an agentic identity and access management platform. We are fast growing and lean team.
We are currently looking for multiple people:
* Product Research and Engineer (NL) * GTM Engineer (SF) * Technical Account Manager (IN) * Customer Engineer (IN) * Account Executive (IN) * Product Marketing (US) For more information, please see - https://adaptive.live/careersWe're a hard-working team of 10. We have an office in Jackson Square with a great view that we're looking to fill with other high-performance people!
Tech-wise, it's React/Typescript + Julia, if that's interesting (no worries if you haven't used it). We've also built our own graph and vector DB to cope with the scale, and the foundations of a neuro-symbolic AI agent that learns more about the world on every search!
Job posting and more information here → https://onton.com/careers
We read and respond to every application.
Thunder Compute is a GPU cloud for developers built on a proprietary software stack of C++ and GoLang. You will solve hard systems problems in production.
Quant dev / HFT SWE experience preferred, team from CitSec, Aquatic, Old Mission, AWS.
Email me: carl@thundercompute.com
Promptless builds AI agents that automatically update customer-facing documentation. Startups, CNCF projects, and Fortune 500 companies use us. YC-backed with a seed round from top VCs and angels.
This is a one-of-one role. You'll own the documentation practice at Promptless: onboarding customers onto the platform, building the methodology for AI-assisted documentation, and growing our reputation as the company that makes docs teams more effective. Think practice lead at a top consulting firm, except the domain is docs and the leverage is AI.
You should have deep experience in technical documentation (developer docs, API references, support content), be comfortable reading code, and be excited about pushing the boundaries of LLM-assisted writing. You'll be building this function from scratch, so an entrepreneurial mindset is key.
Read more: https://promptless.ai/jobs#founding-docs-practice-lead
Email us directly: founders@promptless.ai (mention HN!)
--- ALSO ---
Promptless (YC) | Founding Engineer | San Francisco (Onsite) | Full-time | $140k–$200k + equity
As a Founding Engineer, you'll build the core product—AI agents, integrations, and infrastructure that powers automatic documentation updates.
Read more: https://promptless.ai/jobs#founding-engineer
Same deal. Email us directly: founders@promptless.ai (mention HN!)
Hi HN! We’re a YC-backed, Series-A startup building robots that build large-scale solar farms.
Check out a video of our first system here! https://youtu.be/ZZ2fP1Y5Z2E
It turns out that construction companies literally can't build solar fast enough, so what we're doing is a crucial part of switching the grid over to renewable generation.
You’ll be a key contributor, helping bring our next generation of mobile solar factory to life.
Come work with us if you love:
* Fast-paced prototype development with software and hardware components
* Making a positive climate impact through your work
* Hacking on massive construction equipment!
Senior Robotics Software Engineer: https://jobs.ashbyhq.com/charge-robotics/b2aa347c-4738-4065-...
Senior Mechanical Engineer: https://jobs.ashbyhq.com/charge-robotics/19133a2e-f262-4f3d-...
Lots more: https://jobs.ashbyhq.com/charge-robotics
Hi all, I’m Yuriy, founder of Puma.tech. Prev. worked at Cloudant (YC S08), Meteor (YC S11), Parse (YC S11, Facebook/Meta), and explored AI/ML (computer vision for self-driving cars).
We have 3 products:
1. https://PumaBrowser.com – iOS & Android mobile browser with built in LLMs & Wallets. Private by design. 1m+ downloads.
2. https://PumaAI.com – privacy layer between you and LLM providers.
3. https://PumaClaw.com – (just starting to build) easier way to run and manage your Claws from the phone.
Help building either or all is much appreciated.
Open Roles: Eng (iOS/MacOS, Android, Ai/ML, Browser Extensions), Based Social Media Intern; Internships: Eng, Design, Growth
We’ve raised a few rounds from some of the best builders in crypto and ai:
Protocol Labs (YC S14), Chris Larsen (Ripple), Anatoly Yakovenko (Solana), Illia Polosukhin (NEAR Protocol), Sridhar Ramaswamy (Snowflake CEO), Jason Warner (poolside.ai, ex-GitHub CTO), Don Ho (Orange DAO, Quantstamp W18), Evil Rabbit (Vercel), John Phamous (SF Compute) and other amazing builders.
How to Apply: email careers+hn [at] puma.tech with your GitHub, a note on what you're most proud of building and what you'd like to build next.
Thank you!
Ando provides flexibility for hourly workers starting in restaurants, changing the lives of 80M+ people. Backed by Zero Capital, Slow Ventures and Blitzscaling.
- algorithms/AI, ideally with production experience in scheduling and assignment and also reasoning LLMs.
- product mgmt, ideally with early stage startup experience in enterprise SaaS and restaurant IT systems e.g. 7shifts, toast, etc.
https://www.ando.work/careers or DM me
DM me for intro with resume/linkedin. I'm #proudinvestor and experienced with OR algorithms.
Foxglove is the leading data infrastructure & observability platform for robotics & physical AI.
Prior experience in the autonomous vehicle or robotics industry is a bonus, but not required.
Many open roles:
- Software Engineers (Visualization Engineer, Frontend Engineer, Backend Engineer)
- ML Engineers
- Forward Deployed Engineer (FDE)
- Product Design, Visual Design
- Go To Market
Email in profile.
MintMCP helps enterprises safely do more with Agents (e.g, governance around MCP tools and agents like Claude Code / Cowork, and others). We're building an MCP gateway as the foundation with the proper abstractions that enterprises need to allow long running agents to be safely deployed across an entire organization; organizations can easily and clearly limit the blast radius of what an agent can do, while giving it the right combination of tools to be useful.
We're a small team of humans with dozens of agents: our company operates on the infrastructure we build for enterprises. We're looking for agent-forward engineers and GTM folks to help solve scaling problems, maintain the highest standards for security, make agents and MCPs usable and useful.
Problems we're solving right now: Agent Identity, ReBaC for tool resources, scalable hosting of private MCP servers, and our agent platform that vertically integrates with the foundational MCP gateway layer.
If you have experience in infra, security, and agents, and MCPs, you might find the problems we're working on exciting!
You can see more here: https://www.mintmcp.com/hiring. Your agent might find the page interesting!
Scorecard builds simulation environments and reward models that frontier AI labs and enterprises use to train and evaluate their agents. Same discipline that made self-driving cars work, applied to LLM-based agents.
Our founding team built simulation infrastructure at Waymo, SpaceX, and Uber ATG. I'm Dare, the CEO and scaled Waymo's simulation org to 200+ engineers. We're ~7 people, 7-figure revenue, $3.75M seed led by Kindred Ventures with angels from OpenAI, Apple, Waymo, Uber, Perplexity, and Meta.
Founding Engineer ($175K-$280K + strong equity). Primarily backend. You'll own technical domains end-to-end. We use agentic tooling (Claude Code) heavily. Moving fast and working customers matters more than deep expertise in any one language.
Stack: TypeScript, Node.js, Next.js, PostgreSQL, ClickHouse, Temporal, GCP.
jobs@scorecard.io
I'm Manu, founder of Hyperspell. 14 Years ago I found my first job in tech through Who's Hiring. I take this job board seriously :)
Hyperspell is building Context & Memory for AI agents. We're at the intersection of "future of AI and agentic computing" and "this actually works". We're not just changing how our customers use AI in their products, but are constantly iterating on how we use AI to build Hyperspell, and what it means to be a software company in the decades to come.
We're hiring Forward-deployed (customer success), AI, and Platform Engineers: https://jobs.ashbyhq.com/hyperspell
Comment or reach out to founders@hyperspell.com with any questions!
Uncountable accelerates R&D for industrial scientists across leading materials, chemicals, and life sciences organizations. With our SaaS solution, our customers get better products to the market in half the time. Uncountable was founded by MIT and Stanford engineers and has been profitable since 2016. Our team has grown from 50 to 150 over the last two years.
Full-Stack Engineers | $130k - $220k + Equity
---> Uncountable is looking for engineers who can spearhead the development of the Uncountable Web Platform. The position is heavily product-driven and comes with challenges across the stack.
LLM Applications Engineers | $130k - $220k + Equity
---> Uncountable is looking for LLM applications engineers who can push the Uncountable data model forward through LLM-native UI's and application extensions.
--> Summer internships and working student positions are also available.
Learn more: https://www.uncountable.com/hiring/hn
Uncountable is hiring in New York City, San Francisco, London, and Munich.
Contact our CTO directly at jason@uncountable.com
Modal builds the serverless cloud used by many of the most popular AI companies you've heard of. People use Modal for inference, training, batch operations and also, sandboxes. A good example is the Ramp Inspect tool, that was built on Modal sandboxes. https://engineering.ramp.com/post/why-we-built-our-backgroun... — We also recently passed over a billion sandboxes created and on our way to 2B soon.
I am one of the hiring managers here, hiring for the Product Engineering team that builds the observability tooling for our developers. Modal is the cloud for many of our customers and we help them reason about what's happening in their systems, help them expand their use and generally have a good experience.
If you are interested in a product engineering role, please feel free to reach out directly via email at can@modal.com with a recent resume. This role is NYC based and is on-site, so please mention your current location to be considered. I am especially looking for folks with deep ClickHouse, Postgres, Redis, and Python experience.
Product Engineering Role: https://jobs.ashbyhq.com/modal/a4b8b2b6-5d0c-4ba6-9256-b84be...
For all other roles, please apply from our website.
All roles: https://modal.jobs
We’re a team of experienced generalist SWEs and AI enthusiasts who are building custom AI agents for enterprise clients. No AI experience required: we are actively trying to be the best place in the world to learn applied AI.
I’m Frank, an engineer here. This is the first services-style company I’ve worked at, so for those of you in a similar boat, this is what I’ve really liked so far:
* The learning rate is super fast. 3-4 client projects a year, each with different tech stacks, products, industries, and architectures. Lots of learning resources including a full AI engineering bootcamp when you onboard.
* Our projects are typically high priority and sponsored by prominent executives. The path here for projects to have real impact on usage or bottom line is much shorter.
* We’re “selling pickaxes during the gold rush”. When AI finds its next killer app, we’ll be the first to know about it.
We’re hiring staff+ SWEs onsite with offices in San Francisco, New York, Durham NC, and Dubai. Feel free to reach out to me directly (frank@fractional.ai) or take a look at the full job posting:
https://jobs.ashbyhq.com/fractional-ai/1db16198-e91e-425d-83...
I'm Alex, founder and CEO of River. I also wrote the first line of code and still ship PRs.
River is a client-first Bitcoin-only financial institution building the financial app people use every day to save in bitcoin and spend in dollars. We custody over 25,000 BTC, serve individuals and businesses across the U.S., and are profitable. We publish cryptographic proof of reserves monthly and our company financials annually.
Here's what our engineering team is working on:
- Real-time Bitcoin and USD payments, trading, and settlement on an Elixir monolith with a unified GraphQL API - Next-generation Bitcoin custody with quorum signing, key ceremonies, and geo-redundant infrastructure - Scaling our ML/AI systems (Python, PyTorch, XGBoost, LLMs) to automate operations and tackle fraud/risk - A ground-up React and React Native rewrite of our consumer app - Porting our Lightning Network infrastructure from Go into Elixir We're hiring: - Senior Software Engineer (React, Full-stack) | $150K-$220K - Staff Software Engineer (Elixir) | $200K-$250K - Staff Software Engineer (ML/AI) | $200K-$250K Apply at https://jobs.ashbyhq.com/river?utm_source=Zp9nJyqvd4I'm the cofounder of Krea (https://www.krea.ai/), a company building creative tooling and large-scale infrastructure for multimedia teams. Users range from hobbyists to world-renowned creatives: architects behind the World Trade Center or creative teams at Apple.
We treat research, engineering, and creativity as first-class citizens. We're looking for engineers to join our research, product, and infra teams.
What we value (staff & company writings):
- AGI: https://www.matthewnewton.com/blog/arc-challenge-diffusion
- Diffusion research: https://re-n-y.github.io/devlog/rambling/steering/
- Pragmatic LLM reflections: https://maxemitchell.com/writings/i-read-all-of-cloudflares-...
- Low-level computing: https://gab-menezes.github.io/2025/01/13/using-the-most-unhi...
- Open-sourcing AI research: https://www.krea.ai/blog/flux-krea-open-source-release
Current projects:
- WebGL2/WebGPU for node-based tools & CRDTs for collaboration
- Large-scale multimodal model training
- Cross-service metrics, tracing, and observability
- LLM-driven JS bundle optimization
---
Please apply via `ssh apply@krea.engineering`
You can also apply via https://krea.ai/careers but that's no fun.
Fractional AI operates at the forefront of applied AI, and we measure our success by the business outcomes we deliver in production — not by checking boxes on a SOW. We build production-grade AI systems that optimize core operations, automate internal workflows, and improve customer experiences. Every system is designed explicitly against clear business goals and North Star metrics (revenue growth, cost take-out or avoidance, churn reduction, etc.). Our role is to enable our customers to get past POCs and experiments into robust, real-world systems that reliably create value.
See all open positions here: https://jobs.ashbyhq.com/fractional-ai
New Lantern is building an AI radiology resident—think Cursor for radiologists. Our application integrates the three software tools radiologists use all day [1], together with AI, to create a platform that saves radiologists toil and lets them focus on reading images and finding disease.
We are a series A startup with ~15 engineers (~30 total staff), have live customers generating revenue, several years of runway, and are backed by Benchmark, Anthropic, and other great investors.
We're hiring for several engineering roles. You'll work directly with our founder/CEO, our staff radiologists, and our end users to build a product that radiologists rely on daily. You'll have real ownership and autonomy, and ship meaningful work frequently.
I'm Steve, New Lantern's Head of Engineering. If you're interested or want to learn more, shoot me a note at (my HN username)@newlantern.ai. I've already hired one engineer from HN this year and interviewed many more!
[1] a radiology image archive & viewer, a medical report dictation system, and work management system
We are hiring two Product Engineers to join us in our newly opened office in SF. We're small and early and you'll help shape team culture.
Kinelo solves "context myopia": autonomous and semi-autonomous AI agents don't know what they don't know, so they can't search or find the background information required to accomplish tasks accurately and effectively. The result looks like slop but it's not due to model performance, more due to workflow integration. From there, we're rapidly moving into organizing humans together with autonomous "AI coworkers" into workflows that span both. Our goal is to change how organizations are run and structured.
Our #1 hiring criteria for this position is immense software wisdom, the kind not yet encoded in the weights of an LLM. We are not looking for artisans to meticulously craft single lines of code. We're looking for software engineers excited to use the leverage that AI offers for code production to permit focus on higher order technical architecture, product requirements, and user needs.
We're looking for enough experience that indicates accumulated wisdom in shipping and maintaining reliable, scalable software, solid CS fundamentals, experience taking products from 0 to 1, and versatility.
Our current tech stack includes TypeScript, a managed container service, Postgres, and Redis. But we are adaptive and you should be too. We highly value software engineering and computer science fundamentals and experience with other languages like Go, C++, Python is valued.
Competitive salary, meaningful (~first batch of hires) equity, founder previously exited to Apple, strong fundraising history (~$10m).
Please email us at jobs@kinelo.com. If you want to stand out, tell us how you think the job of a software engineer is changing. There's also a full JD here: https://job-boards.greenhouse.io/kinelo/jobs/4205846009
We build environments that frontier AI labs use to train their models to do real-world software engineering. Team of ~25. We have more demand than we can keep up with, so we're hiring fast. Backed by Nat Friedman, Daniel Gross, and Patrick Collison.
At AllSpice, we're building the future of hardware development and collaboration, applying modern software design principles to the hardware industry with design review, automated test, and AI (think GitHub + copilot for hardware). AllSpice is unlocking the next generation of smart vehicles, IOT devices, rockets, medical devices, robotics, and much more.
Read more about our latest Series A announcement in TechCrunch (https://techcrunch.com/2025/06/23/allspices-platform-is-the-...)!
We have a highly capable, tight-knit, remote-first team with a flex office in Somerville, MA and SF. We strongly value continuous communication and personal development. See more on our careers page https://allspice.io/careers
We’re hiring primarily for:
Director of Software (Go, typescript, rust) - Hands-on leadership role (60/40% management to IC) spanning our Go, Rust, and Vue/TypeScript stack, where you'll own the technical roadmap, help make key architectural decisions, and build the team shaping the future of hardware development. https://www.allspice.io/careers?ashby_jid=7b9852d3-9aaf-4344...
Director of Infrastructure (Linux, Terraform, Docker, SOC 2) - Own our infrastructure stack, security posture, and compliance programs while building and leading a small, high-impact team. This is a hands-on leadership role (60/40 management to IC) requiring deep AWS and security expertise, experience working with legal counsel and enterprise customers, and the ability to hire and mentor as the team grows. https://www.allspice.io/careers?ashby_jid=88cf1665-04ab-4043...
LLM Platform Engineer (python, Typescript) - Build and own the internal tooling, analytics platforms, and customer-facing applications that power our Generative AI team, spanning evaluation dashboards, data pipelines, and lightweight web apps that surface AI-driven design review insights. This cross-functional role blends Python, TypeScript, and SQL across our LLM stack (Langchain, Pydantic AI, Langfuse) to give both internal teams and customers deep visibility into model performance and outcomes. https://www.allspice.io/careers?ashby_jid=6d5963b2-5c5e-4dec...
Head of Growth - Own and scale one AllSpice's enterprise demand & pipeline generation. https://www.allspice.io/careers?ashby_jid=b1ac9d68-2229-4005...
Tech Stack: Docker, Terraform, GoLang, Rust, Python, Vue, Typescript, Python
Please include any relevant open-source projects or portfolio in your application.
Cloudflare is building across the entire AI stack. Here are some exciting things that we have launched recently:
- Release Cog v0.17: https://github.com/replicate/cog/releases/tag/v0.17.0
- Dynamic Worker Sandboxes: https://blog.cloudflare.com/dynamic-workers/
- Kimi K2.5: https://blog.cloudflare.com/workers-ai-large-models/
- Code Mode MCP Servers: https://blog.cloudflare.com/code-mode/
- Agents SDK: https://blog.cloudflare.com/building-agents-with-openai-and-...
We are looking for systems and ML engineers to help build our edge inference platform:
- Senior Systems Engineer, Workers AI - https://job-boards.greenhouse.io/cloudflare/jobs/7764827?gh_...
- Senior / Principal Machine Learning Engineer, Workers AI- https://job-boards.greenhouse.io/cloudflare/jobs/6297179?gh_...
Arcol (arcol.io) is a small, high talent density team building the future of building design - a future that's collaborative, fast, and intuitive. We're a web-native, fully collaborative 3d design tool modernizing the experience of architectural design for teams of all sizes.
We're looking for senior engineers with experience in modern web technologies - some of our key technical building blocks are Typescript, Rust, wasm, WebGL - and a strong ownership mindset. Experience with computational geometry, computer graphics, or similar a strong plus. This role sits at the intersection of solving deep technical foundational challenges with shipping a product that solves real problems for real people.
Reach out to me directly at thomas@arcol.io or peruse our careers page (https://www.arcol.io/careers) - we'd love to hear from you!
I'm an EM at WorkWhile. We're an ML-powered labor marketplace on a mission to help 80M+ hourly workers find better-paying, more predictable work. Our platform uses demand forecasting, realtime skill based worker shift matching, dynamic pricing and many other features to solve problems in a $650B staffing industry that still runs on spreadsheets, phone calls and legacy systems.
Demand for our services is increasing and we have a lot planned. We're growing and hiring across the product engineering org at senior and staff levels:
* Senior Software Engineer, Full Stack
* Senior Software Engineer, Backend
* Staff Software Engineer, Full Stack
* Staff Software Engineer, Backend
We are a small engineering team with a lot of surface area, real ownership and impact. See link below for more details about the company and the roles.
Apply here: https://jobs.ashbyhq.com/workwhilejobs?departmentId=065f00c2...
Let me know if you have any questions (email in profile).
We're reimagining mortgage underwriting for a world where engineers and operators are supercharged by modern AI. We work with 8 of the top 20 mortgage lenders in the country and we're just getting started.
AI transforming knowledge work isn't inevitable. It takes smart, resourceful people who can go beyond pure engineering to understand real problems and build product experiences that bridge the gap between cutting-edge tools and the workflows people actually use.
We're specifically looking for a strong frontend engineer who thrives at the intersection of product, design, and customer feedback, someone who can move fast, iterate independently, and make the right tradeoffs between different competing needs.
https://jobs.ashbyhq.com/homevision/6b54e34c-0f42-42dc-817e-...
What we're looking for:
- Strong problem solvers who can work independently in a remote environment
- Security-minded professionals passionate about building robust, scalable systems
- Comfortable working during Eastern Time
Tech stack: Go, TypeScript, React, Kubernetes Open roles
* Application Software Engineer, Endpoint Security (macOS experience preferred)
* Fullstack Engineer, AI Implementation
* Senior Product Designer
* GTM Engineer
* Customer Support Specialist
We offer: - Competitive salary
- Equity in a fast growing cybersecurity startup
- 100% remote work
- Company offsites yearly (past offsites have been in The Netherlands, Portugal and Italy)
If you're interested in joining our team, please reach out to join<at>oneleet<dot>com with the subject line "HN: <Job Title>" and your resume attached. Alternatively, you can also apply at https://jobs.ashbyhq.com/oneleet
Additional Note: We are also building out a 'forward deployed' sales team based in San Fransisco - if interested, please reach out to join<at>oneleet<dot>com with the subject line of `HN: SF Sales`
Baton (baton.io) is Ryder's in-house product development group focused on harnessing emerging technologies to redefine transportation and logistics. With $10B in freight under management, our technology reaches every part of the U.S. economy.
We design and ship category-defining software that enables Ryder and its 50,000+ customers—including some of the world's most well-known brands—to plan and execute freight intelligently, efficiently, and cost-effectively. Our work includes everything from customer-facing software to the data platform that will power the next era of innovation at Ryder.
Baton's mission: enable supply chain on autopilot.
Ryder acquired Baton in 2022 to power its next wave of digital products. We operate at startup speed, with Fortune 500 reach. If you have a passion for solving complex problems and creating impact for the engine of the American economy, you'll love it here.
Current openings at Baton:
* Senior Software Engineer - Full Stack, Technical Lead ($200,000 - $250,000): https://grnh.se/wkmk2d0e7us
* Software Engineer - Infrastructure, Data Platform ($162,000 - $216,000): https://grnh.se/d6s6od6w7us
Remote: Yes
Willing to relocate: No
Technologies: Distributed systems, database architecture, F1/Spanner, infrastructure scaling, technical debt triage
Résumé/CV: https://www.linkedin.com/in/joebar/
Email: joe@barrera.org
Distributed systems architect. 30 years building infrastructure at CMU, Microsoft Research, Google. I help startups (10-100 people, Series A-C) avoid catastrophic scaling mistakes. I'd rather prevent your outage than debug it.
What I've built: Mach kernel at CMU under Rick Rashid. Research systems at Microsoft BARC (Gordon Bell, Jim Gray). 9 years on F1/Spanner at Google. 4 USPTO patents in distributed systems.
What I'm good at: "Your database architecture will fail at 10x scale, here's why and here's the fix." Technical debt triage with limited resources. Pattern recognition from decades of catastrophic failures. Currently thinking about LLM verification architectures and why static alignment is the VLIW of AI safety.
What I'm looking for: Fractional CTO or senior advisory role (20-30 hrs/week). Series A-C, 10-100 people, real infrastructure problems.
Roles:
- Software Engineer, 3D Modeling
- Senior Software Engineer, 3D Modeling
The TL;DR: We are writing software that generates 3D models of buildings. Homeowners, contractors, and insurance professionals use those models to derive metrics, estimate cost and visualize changes (think kitchen remodel). Our long term ambition is to have an accurate and up to date 3D model (digital twin) of every building on the planet.
Hover is expanding the team on many fronts. The 3D Modeling team in particular is looking for talented & experienced software engineers that have proven experience designing and implementing systems for 3D modeling, reconstruction, or CAD-related software and that bring a solid foundation in geometry and 3D math. As part of that team, you will be responsible for further enhancing, scaling, tuning and battle hardening our pipeline that turns photos of buildings into 3D models.
If you're interested in working with us, please apply online at https://hover.to/careers/#open-roles. Mention you're from HN and let us know what you've been working on lately.
Hike Medical is reinventing musculoskeletal care, starting with feet. Our proprietary AI-vision platform turns a 30 second web based (yes, no sensors) foot scan into precision engineered, 3D-printed insoles that prevent pain before it starts. We're already protecting on-their-feet workforces at Fortune 50 leaders, major health systems, and middle America manufacturers. Fresh off a stealthy round with top tier VCs, we run a fast, no BS, execution first culture out of Boston’s Seaport as we sprint toward $100M ARR and standing with 10M Americans as they step into their shoes daily. As a Senior Software Engineer, you’ll build and ship the core systems behind Hike’s AI healthcare platform. As the backbone of Hike's high-growth, mission-driven platform, you’ll design scalable services, implement production AI, and deliver user experiences that improve patient outcomes. From day one, you’ll have real autonomy and clear impact on transforming the US healthcare system.
What You'll Work On:
* Architect, build, and optimize high-performance, scalable systems that power AI-driven solutions.
* Design resilient, serverless architectures in a TypeScript and AWS environment.
* Develop developer-friendly APIs and SDKs that enable seamless integration across platforms.
* Build and refine high-speed data processing pipelines that drive clinical-grade AI insights.
Ideal Candidate Profile: Technical Skills
* AWS & TypeScript Expert – Comfortable making infrastructure decisions, optimizing cloud deployments, and managing scalable architectures.
* Experience designing, building, and maintaining backend systems that power real-time, AI-driven applications.
* Strong experience in building and optimizing developer-facing SDKs and APIs. Skilled in real-time data processing pipelines and optimizing system performance at scale.
* A thoughtful approach to building secure, resilient, and fault-tolerant systems. Helpful Characteristics
* Product-Minded Engineer – You think about how your work impacts real users.
* Strong Communicator – You clearly explain your ideas, challenge assumptions, and collaborate across engineering, AI, and product teams.
* Thrives in Collaboration – You push back, ask tough questions, and elevate the team.
* Driven to Ship – You want full control over your work, from architecture to deployment, and you’re eager to move fast.
* Mission-Focused – You’re not here to optimize ad clicks. You want to build technology that changes lives.
$150K – $225K • Offers Equity • $15k relocation bonus (if necessary)
Apply: https://jobs.ashbyhq.com/hike-medical/c5a39cb5-fdaa-457d-86d...
We are building products that help improve governance and trust in AI systems. If you want a better steer, guard, and build new forms of trust for long-running & business critical agents, please reach out.
Aside from product, we encourage a lot of exploration https://github.com/eqtylab/ and will soon be productizing concepts such as verifiable intent/specification/planning (I build https://plannotator.ai/ for fun and we think the concepts scale).
Competitive salary and equity.
ramos[at]eqtylab[.]io
- Senior Backend Engineer | SF, Remote (North America) | Full-time | $170-225k + equity - Product Manager | SF | Full-time | $121-177k + equity - Account Exec | SF | Full-time | $120-350k + equity - Growth Specialist | SF | Full-time | $105-$137k + equity
We’re mission-driven capitalists: making life-saving drugs more accessible, and building a $200B+ company on the scale of Palantir or ServiceNow.
Traction: profitable and growing fast. Landing 7+ figure contracts to enterprise healthcare customers.
Team: built by exited founders, YC & MIT alum, ex-Tesla, ex-Google engineers.
Top investors: funded by elite Silicon Valley VCs who've backed unicorns like DoorDash, Lyft, and Mammoth Biosciences. And strategic healthcare investors with deep industry connections.
Outsized impact & opportunity: work at the intersection of agentic AI, healthcare transformation, and life-changing patient outcomes.
If you want to work on a team of A-player athletes, doing the best work of your career, and helping get life-saving drugs to the people who need them, apply here:
https://neonhealth.com/careers (and make sure to mention HN!)
Rinse provides dry cleaning and laundry delivery services to customers in twelve metropolitan areas in the US and Canada. We have sophisticated logistics optimization software, a polished consumer product, and firm business fundamentals. We're now over a decade old - this is a stable, yet consistently growing and innovating, company.
Our engineering team is distributed across the United States and internationally, and has been entirely remote for years now, but a desk can be provided in the above cities if you'd prefer.
We're open to both newly-graduated engineers or more senior engineers, provided they meet our bar. We're particularly interested in true full-stack engineers, with strong React / Typescript / CSS skills to complement comfort in a Python / Django environment. We're also seeking engineers with experience leveraging AI to automate complex operational processes.
This season, we're particularly interested in new grads or junior engineers, to round out the team.
You will join a high-caliber team where collaboration, honesty, and open communication are at the core of everything we do.
Search term bingo: Logistics, Django, Python, Optimization, React, React Native, Postgres, Mobile Engineer, Automation, Delivery, OR-tools, Forecasting
[Leadership] Engineering Manager (SF) https://grnh.se/s7yxefzs5us
8+ yrs - Staff SWE, AI (SF) https://grnh.se/cq0caps45us
8+ yrs - Staff SWE, Product Security (SF / NYC) https://grnh.se/b2kbmt3j5us
Senior Infrastructure Engineer (UK) https://grnh.se/6c1kjk525us
SWE, AI (SF, NYC, DC) https://grnh.se/yl9kuqrg5us
Sr Software Engineer (SF, NYC, DC) https://grnh.se/gwf63pot5us
Sr Product Designer (SF / NYC) https://grnh.se/s96svypy5us
Sr Design Engineer (SF) https://grnh.se/z8ev1cgu5us
Product Manager (SF) https://grnh.se/kyvpq2ww5us
Tech Recruiter (SF/NYC/ DC) https://grnh.se/rtj4fv3h5us
We're using LLMs to build neural optimizers, neural scheduling systems, and neural workload tuners. (If you're ex-Google, you can think of it like Borg powered by LLMs.)
Today we use ML to make data warehouses and spark jobs more efficient. We're hiring staff ML engineers to train models that can understand how much compute a job needs, how it scales to larger machines, whether a machine can run more jobs, and so on; and staff infra engineers to take those models and deploy them on real-world production systems.
If this sounds cool, please email me: ben [at] espresso [dot] ai
Veritus is reinventing loan servicing and debt collection with AI. Our platform enables lenders, servicers, and collections agencies to spin up, personalize, and A/B test AI agents across voice, email, SMS, and chat, while we ensure compliance.
$180k-$250k + equity + benefits
Apply: https://www.ycombinator.com/companies/veritus/jobs/pfkev5c-f...
Tech stack: Rust | ScyllaDB | k8s | Python | Postgres | Elasticsearch | Terraform
Role: Build and operate distributed database systems and data platform services that store all of the data for Discord's 200M+ users.
We're solving interesting problems around performance, reliability, and scalability at one of the largest communication platforms. Looking for strong infrastructure and distributed systems experience, familiarity with databases like Cassandra/ScyllaDB/Postgres, and comfort working in Rust or similar systems languages.
Locket is the fastest-growing social app among Gen Alpha and Gen Z.
What if social media actually made you happier? Unlike other platforms focused on entertainment and endless scrolling, Locket helps you connect with the people who really matter: your best friends.
- 10M DAU, 100M downloads, $10M+ annual run rate
- Help define how AI fits into social media
- Ship to 10s of millions of active users from day one
- Scale the defining social app for the next generation
We’re hiring:
- Backend engineers
- Social media manager
Learn more and apply here: https://locket.camera/jobs
Conductor is an app that lets you run a team of coding agents on your Mac. We've grown 10x since January, and just yesterday we announced our $22m Series A. We're a small team (four people) and we're looking for exceptional software engineers and designers to work with us in SF!
What makes Squint special?
- Our customers include some of the most iconic manufacturing brands across Food and Beverage, Automotive, and Consumer Package Goods. Work here literally transforms how the world around you is made.
- We're not replacing people with AI, we're up-leveling them; capturing insights, turbocharging workflows on the factory floor, and making every operator an expert.
- We're bringing consumer-grade quality to enterprise software, combining cutting-edge tech with deep customer empathy to build a product that's powerful, magical, and deeply loved by our users.
High Priority Open Roles:
- Applied AI Engineer (Mid-level to Staff+)
- Software Engineer, Backend
- Product Manager
- Senior Sales Engineer
View full list of roles and apply here: https://jobs.ashbyhq.com/squint.ai?utm_source=Hackernews
At Shepherd, we're pursuing the most ambitious technical vision in commercial insurance: fully autonomous underwriting. Shepherd is an AI-native commercial insurance platform transforming how high-hazard industries get covered.
The infrastructure behind the AI boom (data centers, semiconductor fabs, renewable energy assets) has to be built and insured, but traditional carriers weren't built for this speed. We built Shepherd to solve that.
We just announced our $42M Series B last week! That brings our total funding to over $60M — led by Intact Private Capital, the investment arm of one of the largest insurers in the world. Intact is not only our lead investor but also a carrier partner, a testament to the confidence the incumbent industry has in what we're building.
(Hear from our CEO here: https://www.shepherdinsurance.com/blog/behind-our-42m-series...)
(Hear from our CTO here: https://www.shepherdinsurance.com/blog/the-road-to-autonomou...)
This year, we’re doubling our engineering team from 20 to 40. We’re looking for product-minded engineers to join us as we continue to scale! We’re looking for someone who thrives on ownership, drives results, and cares deeply about both technical excellence and customer impact.
We’re hiring various mid-level, senior-level and staff-level engineers. See some of our openings below:
* Full Stack - Job Posting: https://jobs.ashbyhq.com/shepherd/c4081c3d-a79b-4ac9-aa19-78...
* Backend - Job Posting: https://jobs.ashbyhq.com/shepherd/395f4b75-cf05-4581-8408-8f...
* Machine Learning Engineer - Job Posting: https://jobs.ashbyhq.com/shepherd/797316b4-bdcc-4c0c-8bc2-46...
* Applied AI Engineer - Job Posting: https://jobs.ashbyhq.com/shepherd/26959124-aab2-446e-aa4d-72...
* Design Engineer - Job Posting: https://jobs.ashbyhq.com/shepherd/aa254ca8-6721-4770-9a9b-e0...
* Product Design - Job Posting: https://jobs.ashbyhq.com/shepherd/386f87c9-4315-4fc7-aad7-ec...
* Senior Technical Recruiter - Job Posting: https://jobs.ashbyhq.com/shepherd/ccab3e26-4fc8-4bc2-ada3-71...
Our stack includes: Typescript, React, Next.js, GraphQL w/ Apollo, Node.js, Postgres & Redis
Apply here: https://shepherdinsurance.com/careers
* In the form, be sure to mention that you heard about this opportunity via Hacker News.
If you want to read more about our team and culture, check out our blog: https://shepherdinsurance.com/blog