Flok builds and runs explainable AI (not LLM-based) physiotherapy clinics. We currently operate in the UK healthcare system.
We’re a real clinical service, built on software solving hard problems across expert systems and real-time video streaming, providing treatment for (chronic) back pain, and soon, other common conditions. Flok is both a "clinic" and a consumer product company, so we can make our patients' experience as good as possible.
Recent article about us on the BBC: https://www.bbc.co.uk/news/articles/cy4y9xm1eejo
We also recently gained class 2a medical device certification for our technology: https://www.digitalhealth.net/2025/10/ai-powered-physiothera...
Our core languages: Python, Typescript, Rust.
Read more and apply at https://www.flok.health/careers or find me online and DM me!
What you’ll do
AI Innovator: Prototype and ship production AI features fast; extend our multi-agent orchestration; design private/sovereign data pipelines and dynamic indexing; collaborate tightly with founders to turn research into product.
Principal SWE: Own core platform architecture; design and scale distributed backends/APIs; build great DX (SDKs/CLI); lead reviews/mentorship; drive 0→1 projects with strong reliability and observability.
You might be a fit if you have
A track record taking systems from concept to scale and to revenue.
Deep backend/systems skill (Go/Rust/Kotlin or similar); strong CI/CD/testing discipline.
Experience with distributed, real-time data infra; privacy/security minded.
Hands-on AI product chops (CV, NLP, LLMs/agents) and bias to build/iterate quickly.
Clear communication, product intuition, and comfort working directly with founders.
Apply via the role links above.
Our current stack is Ruby, Rails, MongoDB, and React.JS. We are looking for more Junior and Senior FullStack Engineers. We have an awesome work environment: We are a remote first company (before Covid!). We do continuous integration, continuous deployments, code reviews, code pairings, profit sharing, and most of communication is async via GitHub.
We value super strongly transparency, do open books, have a public roadmap, and contribute to the EFF.
Apply at: https://serpapi.com/careers
CEF AI builds an AI-first data automation platform for secure, decentralized orchestration of agents that compute directly on encrypted data streams. We’re shipping original systems (not wrappers), with multiple tuned models (CV, NLP, LLMs) and a next-gen multi-agent data infrastructure. Small team, high ownership, low bureaucracy.
What you’ll do
AI Innovator: Prototype and ship production AI features fast; extend our multi-agent orchestration; design private/sovereign data pipelines and dynamic indexing; collaborate tightly with founders to turn research into product.
Principal SWE: Own core platform architecture; design and scale distributed backends/APIs; build great DX (SDKs/CLI); lead reviews/mentorship; drive 0→1 projects with strong reliability and observability.
You might be a fit if you have
A track record taking systems from concept to scale and to revenue.
Deep backend/systems skill (Go/Rust/Kotlin or similar); strong CI/CD/testing discipline.
Experience with distributed, real-time data infra; privacy/security minded.
Hands-on AI product chops (CV, NLP, LLMs/agents) and bias to build/iterate quickly.
Clear communication, product intuition, and comfort working directly with founders.
Apply via the role links above.
Common Prefix is a science-first blockchain consulting company. Our vision is to make blockchains usable for mainstream users and everyday people – paying at the supermarket, remittances, moving money across borders, saving, investing – and solving the real problems of usability, scalability, and interoperability that come with it.
We're a 30-person team, half scientists (cryptographer PhDs, post-docs, and professors) from renowned universities, half engineers with long web2 experience. A lot of our field is broken and we're trying to make a small contribution in fixing it, by introducing provable security and proper engineering practices across the board.
What we're looking for: Software engineers who can solve problems, are smart, get things done, and enjoy working on the bleeding edge, learning about cryptography, and working from first-principles. Auditors who can write and read code, especially low-level cryptographic implementation code (zero knowledge verifiers, signature schemes, etc), consensus (PoW, PoS), or smart contracts (everything DeFi).
Tech stack: Doesn't matter, we'll teach you. But we work mostly with Rust.
Open roles:
* Software Engineer, https://commonprefix.notion.site/sw-folk
* Auditor, https://commonprefix.notion.site/auditing-folk
We offer:
- $80,000–$160,000 / year cash
- Local from Athens, Greece, or remote, preferably in Europe
- Conference participation in exciting scientific and engineering venues, 2-3 times per year
- The opportunity to work and learn from world-class scientists from major universities in the field of blockchains, cryptography, and consensus
If you're interested in joining our team, please reach out to careers<at>commonprefix<dot>com with the subject line "HN: <Job Title>".
We’re a VC-backed startup of 35 people, with engineering and product based in Sydney. The founding team previously built and exited companies in the fraud and security space (including billion-dollar outcomes).
The role: We’re looking for a senior fullstack engineer who enjoys working across boundaries from TypeScript frontends and backend services to data pipelines and distributed systems. You’ll work closely with our platform and product teams to build the tools that power customer fraud detection and orchestration. Someone who has built vscode extensions or has worked closely in the fraud or security space would be a bonus
Our stack: Rust for the engine, ClickHouse for persistence, TypeScript (React + Node) for frontend and ancillary services, deployed globally at the edge.
Interested? decodeRot13(oqnirl@qnejvavhz.pbz)
Ditto is building an edge-first, peer2peer database and streaming APIs that solve challenging data synchronization problems. Our core is built on CRDTs and Rust.
If you know networking, ATAK, p2p, ROS2 or wireless MANETs please apply. I’m building out a team to apply the technology to life saving markets and need a hand. You’ll own some greenfield development, get out in the field with firefighters, work with UAVs, and ride multicast over cutting edge mesh radios.
Compensation 130-210k + equity and benefits.
Interested then apply at this link https://job-boards.greenhouse.io/dittoliveincorporated and mention HackerNews. There are other opportunities listed as well!
We've raised $42M to support our ultimate vision, a new way to collaborate on software, where conversations about code remain connected to the code itself, instead of being tied to aging snapshots or scattered across different tools. The first step was creating a high-quality editor to serve as the user interface. Now this new investment lets us expand to tackle the next phase of our plan. We're developing a new kind of operation-based version control that incrementally tracks the evolution of your code with edit-level granularity, and we're integrating it into Zed to make collaboration, both with agents and teammates, a first-class part of the coding experience.
Backend Rust Engineer - https://zed.dev/jobs/backend-engineer
Rust Engineer - https://zed.dev/jobs/rust-engineer
AI Rust Engineer - https://zed.dev/jobs/ai-engineer
Product Manager - https://zed.dev/jobs/pm
Product Designer - https://zed.dev/jobs/product-designer
We're digitizing pokemon cards and creating unprecedented financialization of card assets. We're a small bootstrapped team. Interested in those able to wield Claude Code effectively, and take a test-driven approach. Bonus points if you have any interest in tokenization of RWAs. Our stack is written in Rust, with a vanilla JS and templated HTML frontend.
Novig is rebuilding sports betting from first principles as a prediction market exchange. Legacy sportsbooks are extractive middlemen with misaligned incentives, dark patterns, and predatory mechanics. We're creating the alternative: a transparent exchange where users trade against each other at fair odds.
We're building core infrastructure around order routing, risk management, data pipelines, low-latency networking, and market integrity at scale. We write Rust extensively. We believe correctness, performance, and expressive code are necessities rather than luxuries. Ideal candidates care deeply about infrastructure, security, and performance. It certainly won't hurt to also care about prediction markets, traditional markets, or well-designed distributed systems.
Tech stack: Rust, Node, PostgreSQL, Kafka, Linux, distributed systems.
jobs@novig.co | https://job-boards.greenhouse.io/novig/jobs/4588745006
We're building the platform for engineers who spend most of their time planning and reviewing code written by AI. We’re hiring for two senior roles:
Frontend (TypeScript, React): https://jobs.polymer.co/vibe-kanban/36855?source=hn
Backend (Rust): https://jobs.polymer.co/vibe-kanban/36873?source=hn
The project is open source — check it out here: https://github.com/BloopAI/vibe-kanban
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 AI and Data Architecture - You'll own and improve our data architecture for our AI product for circuit design. You should have proven experience owning major components of an agentic production software architecture. This is a "player/coach" role, in charge of the architecture and supporting roadmap with our PM, but also mentoring, reviewing and at times implementing new AI solutions. https://jobs.ashbyhq.com/allspice/c1dc606d-88d3-4662-985b-70...
Sr/Principal SW (Go, TS) - You'll take a major ownership stake in our full-stack web application, which includes collaborating closely with Product Management to architect & implement complex data rendering, user management, and novel features for hardware engineering teams. https://jobs.ashbyhq.com/allspice/3a80d480-ee07-481d-b5c3-10...
Sr/Principal SW (Python) - You'll take a major ownership stake in our actions automation feature. This includes working closely with Product Management to implement a baseline of automation scripts for ECAD data (see some examples here: https://hub.allspice.io/Actions/), developing better integrations into AllSpice platform, and supporting our AllSpice AI agents. https://allspice.io/careers?ashby_jid=09d0e89e-cff9-462b-a37...
Product / Growth Lead - Define how we position, launch, and grow AllSpice’s products. You'll shape our brand voice, craft compelling narratives, and create content that inspires electrical engineering leaders and the broader hardware community. https://jobs.ashbyhq.com/allspice/7ffd19c6-1e80-41f5-bcea-29...
Tech Stack: Docker, Terraform, GoLang, Rust, Python, Vue, Typescript, Python
Please include any relevant open-source projects or portfolio in your application.
Spruce lets users control their data across the web. Instead of users logging into platforms, we believe platforms should request to access data vaults controlled by users.
The demand for trusted digital ID is accelerating as AI deepfakes begin to destroy most of the ways we use to verify identity today. How private or secure is it to hold your driver's license or passport up to a webcam to get a bank account? Was it ever private or secure? Stable diffusion can break so much of this already. Society will need trusted digital IDs and credentials. Our mission is to allow them to be controlled by individuals, with safeguards to prevent descents into surveillance states and checkpoint societies.
We are the main implementers of category-defining initiatives such as the digital ID program for the California DMV, and the verifiable digital credentials program in Utah. We are private sector participants in NIST's National Cyber Security of Excellence initiative for privacy-preserving digital ID.
Today, we are hiring highly capable engineers who care about making a real impact in improving public services, digital autonomy, and user privacy for the world. We work closely with public sector agencies, and everyone on our team has a high regard for those in the public service. We have a strong engineering culture. We are not a SaaS product or AI wrapper, and our roles are not for the faint of heart. You will be expected to work hard and learn a lot in this role.
Our engineers are incredibly ambitious. On any given day, they may write great Rust/C#/TypeScript, deal with mainframe dumps, read policy documents, respond to technical RFIs/RFPs, manage on-prem environments, implement new NFC + Bluetooth protocols in Swift/Kotlin, create CI/CD processes that enforce W3C accessibility guidelines and i18n requirements, rewrite lost specs from disassembled binaries, figure out stablecoin payments, and design new protections for public key infrastructure. It is a team effort, and people with T-shirt shaped skills are able to collaborate and learn a ton from each other every day.
The potential impact of this work cannot be understated, and this is not the right job for you if you want to "join a cool new AI startup" and make a fast exit. However, if you care about our mission, then you will have the opportunity to make meaningful outcomes for society that will make you feel proud.
See our roles here: https://jobs.lever.co/sprucesystems/
If you're interested in this topic, we recently proposed new models for identity in the financial sector:
https://blog.spruceid.com/modernizing-bsa-and-aml-cft-compli...
If you feel very strongly about what we do, please email me directly with your reasons and resume at wayne AT spruceid.com.
- Doing 1B+ API calls per day
- Our main languages are Rust and TypeScript, we also use mobile and offline pipeline languages (Python, Scala, and Terraform).
- We're based in NYC with our HQ in Union Square and remote friendly (US)
Interesting things we're working on:
- HorizonDB, our Geospatial database written in Rust
- Precise indoor location more accurate than iOS and Android leveraging Ultra-Wideband, other mobile sensors and ML.
- Extracting raw map data from satellite maps and the web leveraging ML and AI
- Anomaly detection to identify spoofed locations
- Mobile infrastructure that automatically configures itself optimizing battery-life and location accuracy for different use-cases over time
- Multi-Region AWS K8s deployment, 99.99%+ availability
- Frontend tools to visualize and debug location data at scale
Check out our jobs page here: https://radar.com/jobs#jobs If you have any questions, feel free to reply here or you can e-mail me at tim@radar.com
We are building a new programming language (BAML) to build AI agents -- the "typescript" for LLMs. We are open source: https://github.com/BoundaryML/baml
A big part of this language is all the tooling around visualizing non-deterministic code, visualizing code, and getting great observability (e.g. our language has type information at runtime unlike TS).
We are looking for engineers with experience with Rust, programming languages, and/or compilers. Any amount of experience is fine.
To apply: send an email to aaron@boundaryml.com with your resume and mention you came from HN
Imagine a piloted air taxi that takes off vertically, then quietly carries you and your fellow passengers over the congested city streets below, enabling you to spend more time with the people and places that matter most.
We are looking for an experienced and motivated Mobile/Full stack Senior Software to join our Air Taxi Systems team.
Most of our apps are built with SwiftUI, TCA, and GraphQL. Our backend is a mix of Java, Rust, and Swift using Federated GraphQL.
https://careers-jobyaviation.icims.com/jobs/4324/senior-soft...
We are also hiring a variety of engineers, technicians, and corporate roles: https://www.jobyaviation.com/careers/
We're a team of 17, all engineers today. We work in Rust, Python, Typescript, and Go.
We're hiring for these areas:
- Database Storage
- Distributed Systems
- Product Engineering
- Platform
- Product Design
What we’ve recently done:
- We built and launched a new search API with hybrid search and sparse vectors
- We built a new sync API that lets us handle ingesting, chunking, and embedding data from sources (we currently support Github repos)
Apply here: https://jobs.ashbyhq.com/trychroma/9ed3aee8-07dd-44e3-9ca1-d...
More details at: https://careers.trychroma.com
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!
MixRank processes petabytes of data every month from web crawling. We have hundreds of customers using our data products including Google, Amazon, Facebook, Intel, and Adobe, across industries including Finance, Recruiting, Sales, Marketing, and Security.
We’re a fully-remote company with a global footprint in over 20 countries. We're growing, profitable, employee-owned, no dependence on outside funding. Applicants from all geographies and backgrounds are welcome.
We are looking for passionate individuals for whom programming is not just a job but it’s something they love to do. We're obsessed with computers, programming, big data, databases, compilers, hardware, math, data science, and the internet. Does this sound like you? Please apply to join our team.
Our code base is very friendly to new contributors. You'll have a fully-functional development environment within hours (fully automated) and be pushing commits on your first day. Deployments to production happen multiple times per day and finish in less than 2 minutes. Effectively all of our codebase is written in Python, Rust, SQL, Javascript/TypeScript, and Nix. The core technologies you'll need familiarity with to be productive are Python, PostgreSQL, Linux, and Git.
We operate at a larger scale than typical startups. We operate two datacenters with high performance servers we've built that are capable of dealing with the volumes of data we process. We've implemented our own distributed file system. We do full-scale web crawls. We download and perform static analysis on the entire universe of Android APKs and iOS IPAs that are published. Unlike a typical startup where you'll spend half of your time in meetings, and the other half fixing bugs from Jira tickets— at MixRank you'll get to challenge yourself with difficult technical problems that will help you to grow as an individual.
We're hiring continuously for the positions below— they aren't singular positions that will close once filled. Our philosophy on hiring is that the candidate is more important than the position. For each new member of the team, we design a custom role and responsibilities that are specialized to their interests. Other companies will come up with a long list of specific requirements for a position with the expectation that you'll exactly replace someone from the team, or that you'll be the perfect tetris piece that satisfies the job requirements decided by a committee. MixRank is more pragmatic: we'll first get excited about having a unique individual on the team, then we'll figure out the best way to accommodate their specific talents.
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Junior Software Engineer - Remote (Global), Full-Time
We're looking for remote junior engineers that have 0-3 years of professional experience in software, and 5+ years of curiosity exploring computers, programming, and technical hobby projects. This is an open-ended entry role with mentorship and diverse opportunities to work on all areas of our product: databases, distributed systems, infrastructure and tooling, data analysis, machine learning, frontend/backend web development, APIs, data mining, data modeling, and more. To stand out, please highlight what makes you unique: passion for computing, curiosity and side projects, work ethic, niche research, etc.
Ideally you've already graduated, but if you still have one or more years left of school, please feel free to apply anyway, and if you're the right fit for the team we'll figure out a way to accommodate your schedule.
https://www.ycombinator.com/companies/mixrank/jobs/Fnwsojk-j... --
Software Engineer - Remote (Global), Full-Time
We're hiring generalist software engineers to work on web applications, data mining, machine learning/data science, data transformation/ETL, data modeling, database scaling, infrastructure, devops, and more. We'll cater the role to whatever subset of these areas match your interests.
Beneficial experience includes PostgreSQL, Python, Rust, Linux, TypeScript, Nix, frontend/backend web development, and data mining.
https://www.ycombinator.com/companies/mixrank/jobs/RXQspen-s...
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I’m Kiran, Chief of Staff (CoS) at MixRank, a fully remote data startup building go-to-market intelligence. We’re US-incorporated but hire globally, and we’re bringing on new teammates to join a fast-moving team with real ownership and impact.
Hey HN, I'm hiring engineers for the new Cloudflare Data Platform (https://blog.cloudflare.com/cloudflare-data-platform). We do streaming ingest and processing, managed Iceberg catalogs, and a distributed query engine—all built on R2 and the Cloudflare Edge. We're making it ridiculously easy for Cloudflare customers to build data lakes.
I'm looking for Rust engineers with experience or interest in databases, stream processing engines, and query engines. You'll get to work on incredibly cool tech on a huge scale.
Note: we are hiring for hybrid in one of our engineering hubs (SF/AUS/SEA/NYC/LON/LIS).
If you're interested, shoot me an email (in profile) with subject HN and a brief description of your background.
Foxglove is the leading observability & data platform for robotics and physical AI. Our software supports the full data lifecycle, from collection, upload, and storage, to analysis and visualization. We're assembling the most talented team in the industry to build a platform for all types of robots. Sound interesting? Join us!
* San Francisco, CA (open to remote for candidates with AV/robotics experience) *
- Rust & Data Engineers
- Visualization Engineers
- Product & Visual Design
- Account Executive, Defense
* Seattle, WA (remote) *
- Forward-Deployed Engineer
* UK & Europe (remote) *
- Visualization Engineer
- Solutions Engineer
* Australia/NZ (remote) *
- Senior/Staff Rust Engineer
Technical Project Manager: https://jobs.ashbyhq.com/category-labs/bdfe89a6-83f6-4ab3-b6...
Senior SWE (Rust, C/C++): https://jobs.ashbyhq.com/category-labs/45f674b2-d904-482e-a5...
Smart Contract Engineer (Solidity): https://jobs.ashbyhq.com/category-labs/776ce314-aa12-471b-92...
Senior Researcher, Systems: https://jobs.ashbyhq.com/category-labs/015934c5-66e5-4042-94...
Early Career SWE, 2026 Grads (Rust, C/C++): https://jobs.ashbyhq.com/category-labs/0dfdffdf-cefb-48fb-bb...
Research Intern (Summer 2026): https://jobs.ashbyhq.com/category-labs/62558e75-42bb-4c9e-b8...
We are currently looking for Rust and Python software developers to join us in Berlin.
Our homepage: https://www.frequenz.com
Apply here for Rust: https://www.frequenz.com/jobs/senior-rust-engineer and here for Python: https://www.frequenz.com/careers/senior-python-developer
Feel free to attach links to your code examples from github, gitlab, or the like to your application.
These roles are not fully-remote. These are based in Berlin, with a possibility for hybrid-model, which can be discussed during the course of the interview.
(PS: If you choose to apply, we would appreciate if you could mention that you have come from HN :) )
Role: Develop and implement infrastructure upgrades, database tuning, Kubernetes and Helm orchestration, monitoring, and security. Help maintain and improve our large-scale Rails monolith, including CI/CD. Participate in on-call rotation and help automate daily DevOps tasks.
Stack: MySQL/PostgreSQL, ScyllaDB, Redis, ElasticSearch, Terraform, Google Cloud, DataDog and more.
Applications: Rails, Vue.js/Typescript, Rust
Perks: Paid time off (2 weeks vacation, 5 statutory holidays, 2 weeks at Christmas, 4-day summer workweeks), annual company retreat, anniversary gift ($200/year), monthly music subscription reimbursement, fully paid maternity & paternity leave.
How to apply: Email jointheteam+do@fetlife.com with a brief introduction, 2–3 favorite projects, GitHub/GitLab link, and LinkedIn profile or resume (PDF).
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