Steel is building open-source browser infrastructure for AI agents & apps. We make it easy for AI engineers to ship products that interact with the web using our Sessions API - An API that controls fleets of browser sessions in the cloud while we handle everything from scaling to antibot and more.
Our tech stack:
- Frontend: Vanilla React + TailwindCSS + Shadcn, built with Vite, deployed on Vercel
- Backend: Fastify, Node.js, Zod, NATs, Drizzle with Redis, PostgreSQL, and S3
- Infrastructure: Pulumi, Go, Firecracker VMs, Docker
- Languages: Mostly Typescript, Rust, Go
With over 6,000 GitHub stars, dozens of paying customers, and millions of sessions served, we grew our platform 50x in 2025 purely through word-of-mouth and our open-source community. Backed by world-class investors, we're building a small, talent-dense team that's shaping the future of how humans & agents interact with the internet.
Current roles (all roles include competitive comp + equity):
- Infrastructure Engineer: Design, optimize, and scale our browser VM infrastructure
- Applied AI Engineer: Build on agent frameworks, integrations, and real-world AI use cases
- Founding Growth Lead: Own the growth machine to turn insane organic traction into a category-defining brand
- Founding GTM Lead: Be our first sales hire, closing deals with AI startups transforming entire industries
To learn more & apply (Mention HN): https://jobs.ashbyhq.com/steel
P.S. If you're feeling spicy, try our optional hiring challenge and submit the flag with your application once you reach the final step → https://challenge.steel.dev
We're building an AI notetaker and task management tool for financial advisors. Startup is headquartered in NYC. If you're not in NYC, quarterly travel to the office is expected.
Front end: React DB: Postgres APIs: Golang, Elysia/Node Infra: AWS ala Terraform
Interview Process 1. 10-minute async coding challenge 2. Hiring manager chat and 20-minute coding challenge 3. 45-minute Coding Challenge w/ another Engineer from the AI team 4. System Design Interview 5. Chat w/ a Product Manager
Apply here: https://avantos.breezy.hr/p/4a707ef4f952-senior-software-eng...
We’re open-source, developer-first, and focused on making data movement radically simpler across both our Platform and Applications layers.
We’re hiring for:
Senior & Staff Backend Engineers (Integrations)
5+ years backend experience; Go required, Rust a plus. Own core systems powering real-time data pipelines. Build complex API/database integrations, improve connector frameworks, and tackle deep challenges in performance, reliability, and developer experience.
Backend Engineer (Integrations) – 2–4 years of backend experience. Help expand and maintain our catalog of real-time data connectors to SaaS tools using Python. You’ll work closely with experienced engineers to build and optimize integrations with third-party systems, while deepening your skills in infrastructure and stream processing.
Solutions Engineer - Work with the founding team to help customers use Estuary effectively. Collaborate closely with engineering and product, shape how users integrate real-time data, and feed insights back into product development.
What we’re looking for: Engineers who care about building reliable, maintainable systems and enjoy working with complex APIs and data flows. We value curiosity, clear communication, and a willingness to learn.
Bonus points for experience with CDC tools, open source contributions, or fast-paced startups.
To apply: Email your resume to careers@estuary.dev
Kinelo manages the new type of hybrid team that will emerge in the future: humans+AI working shoulder-to-“shoulder”.
Our first product helps human software engineering teams deliver more efficiently and more reliably by assisting in coordination and engineering management. But it’s built on a foundational layer that ingests data, knowledge, and process across communications and systems, exposing that to humans and AI alike.
Eventually, Kinelo will become a proper human+AI orchestration layer, managing entire companies, and our goal is to have Kinelo run Kinelo (we already dogfood it today).
We’re looking for high ownership individuals to join our small team and shape its direction. We also just opened a new SF office and new hires will have the ability to help shape company culture, engineering practices, architecture, and roadmap.
We’re well-funded (just raised another round), founded by a serial founder, anti-bureaucratic, and highly technical.
We’re looking for:
- Those who want to go 0 to 1 with high ownership: moving features and products from idea on a napkin, to prototype, to engineering UI, to shipped and polished product
- ~8 years professional experience, including the pre-LLM days with strong CS fundamentals
- A balance of wisdom from experience and optimism about the future
- Strong TypeScript and Postgres (or other RDBMS) experience at scale and with high reliability (SaaS apps, APIs, etc)
- Experience with a variety of technologies, including containerization, distributed systems, and at least one strongly typed programming language (Go, C++, Java, etc)
- Ideally experience with ML and AI systems (though expertise in ML, data science, etc is not needed for this role)
We can’t sponsor visas but relocation assistance to SF is possible.
Please apply here: https://job-boards.greenhouse.io/kinelo/jobs/4088659009 and also email jobs@kinelo.com, mentioning this post.
We're hiring 10-12 summer interns (June-August) to work on real client projects and research alongside our security engineers in NYC. You'll contribute to software security assessments, tool development, and research that gets published. What we're looking for:
Strong technical skills: C/C++, Rust, Go, Python, Solidity, etc. Experience in reverse engineering, appsec, program analysis, smart contracts, or cryptography
NYC interns get the full experience: Summercon, team events, Broadway shows, and more.
Remote available for strong candidates.
Actively reviewing applications and interviewing now.
Kato is building a compliance-first AI servicing platform for the $24B lending market. While others treat regulatory guardrails as an afterthought, we’ve built a regulatory rules system with an AI decision engine on top. Our first product is a Voice AI agent currently handling loan servicing calls for major fintechs like Bilt Rewards and Parafin.
We are backed by Pear VC and angels from Brex, Bridge, and Square. You’ll be our second engineering hire, working directly with our CTO (ex-Google/Brex EM) and CEO (ex-Goldman/Brex).
The Role: As an early hire, you’ll own mission-critical projects across the entire stack. You’ll lead the architecture of our real-time voice processing system, optimize LLM integrations for compliance-aware conversations, and build out our customer-facing dashboards.
Tech Stack:
Backend: Golang, PostgreSQL
Frontend: Next.js, TypeScript, React, Tailwind
Infra: AWS, Terraform, Kubernetes, Docker
AI/ML: LLMs, Speech-to-Text, Text-to-Speech
Requirements:
2-5 years of production software experience.
Strong API design and architectural thinking.
An "owner's mindset"—we are a small, high-intensity team where everyone drives product direction.
Experience with WebRTC, real-time audio, or FinTech is a plus but not required.
Location: San Francisco (4 days/week in-person).
To apply: https://jobs.ashbyhq.com/Pear-VC/214dc247-0778-485b-8a3d-067...
I'm Alex McHale, Lead Developer at GreenArrow Email. We're looking to add an additional developer to our team. The right candidate will have solid Go skills and can "hit the ground running" (so sorry for the cliché). Bonus if you're a polyglot who might have skills in Ruby on Rails and JavaScript.
We've put a lot of thought into our job post. Please give it a read. If you think you're a fit, there's a link at the bottom of the post with a form to fill out.
We're Hiring at Adalat AI: Join Us in Building the Future of Justice
Adalat AI is on a mission to transform India’s judicial system with cutting-edge AI — reimagining courtroom workflows from transcription to summarization, just as UPI transformed payments and Aadhaar revolutionized identity verification. Deployed across 10 states and recently launched at the Delhi High Court, our platform is backed by global foundations and built by a team with roots at Harvard, Oxford, MIT, and IIIT-Hyderabad.
Roles:
- 2 X Fullstack Engineer (5+ YOE) – Own end-to-end feature delivery across React/Next.js, Go services, with Postgres as your database: https://www.adalat.ai/careers/full-stack-engineer
- Full stack Lead Engineer (10+ YOE) - Own technical leadership, mentor engineers, set technical roadmap of several of our products: https://www.adalat.ai/careers/lead-engineer-full-stack
Why Adalat AI?
- Mission-driven: Your work has real-world impact—helping untangle India’s court backlog, improving access to justice for millions.
- Remote-first: Work from anywhere.
- Unlimited PTO: Yes, seriously.
- Unique environment: Co-design with judges, legal experts, and researchers. Publish, learn, grow. We value tech, law, and impact equally.
Viam (founded by former co-founder/long-time CTO of MongodDB) is an open source robotics + AI developer platform. It is a single platform that brings software engineering maturity to robotics and automation.
Why this could be interesting to you: Impact: ~100 people (~70 engineers) with only a handful at Staff level → huge room for influence.
Proven, technical founder (MongoDB): → scaling with traction and real customers.
Tech: Backend-focused teams (Core Services, Infrastructure, Motion Planning, Platform/Server) using Golang, MongoDB, Linux, GCP.
Timing: Early enough to shape core architecture, late enough to see meaningful usage and scale.
Contact amanda@viam.com or apply here: https://grnh.se/p755pzqr4us
Rainbow is a tech-enabled small-business insurer. We built software that underwrites small businesses (starting with restaurants) and evaluates them against various risks to provide them with insurance policies. We've been live for only 2.5 years but already one of the top insurers of restaurants in the US. We are looking for an experienced software engineer to join our team and help us grow and innovate. We've raised around $20m to date with a series A around end of 2024. We've grown massively over the past year. Most of our problems we're currently working on are about building tech as we expand out to other categories of insurance and insuring other types of businesses.
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
RunReveal is the Security Data Platform that's building tools to help companies detect and respond to threats in their network. We're a team that values speed, quality and curiosity. Our stack is Go, NextJS (TS), Postgres and ClickHouse. We believe that companies should be able to own their security data and get value out of it too and so we've built a platform that can be deployed anywhere. SIEM sucks, so we're here to fix it.
If you're into self hosting or running a homelab, or you're using LLMs to enhance your development workflow and extend your knowledge and not just regurgitate slop, or you're always looking for opportunities for self improvement, you're in good company at RunReveal.
We've got phenomenal customers like Cursor, Harvey, Temporal, Linear, DigitalOcean, ClickHouse and AngelList among many others that we work with on a daily basis to improve the product.
We're especially interested in folks that have experience working with petabyte scale databases. We use ClickHouse, but experience with other similar large scale data technologies like Iceberg, Flink, Spark, ScyllaDB, Cassandra, InfluxDB, TimescaleDB, BadgerDB etc would also be valuable.
Reach out to me via alan at the company domain and mention hn who's hiring January '26 in the subject line.
Common Prefix is a blockchain research & development company. Blockchain technologies enable large-scale economic coordination through shared, programmable ledgers. Our mission is to solve the foundational scientific and engineering challenges standing in the way of mainstream adoption, particularly around interoperability, scalability, and usability. We combine formal scientific research with production-grade engineering. Our team publishes in top-tier peer-reviewed venues and builds open-source infrastructure used across major blockchain ecosystems. We have contributed to advanced systems including Axelar, XRPL, Sui, and Flashbots, and are trusted partners to protocols building critical infrastructure.
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.
Tech stack: Doesn't matter, we'll teach you. But we work mostly with Rust, Go, and TypeScript.
Open roles:
- Software Engineer (mid): https://www.notion.so/commonprefix/Opening-Software-Engineer...
- Senior Software Engineer: https://www.notion.so/commonprefix/Opening-Senior-Software-E...
- DevOps: https://www.notion.so/commonprefix/Opening-DevOps-Engineer-2...
We offer:
- $50,000–$160,000 / year cash + stock grant + performance bonus (depends on level but not location)
- Local from Athens, Greece, or remote
- 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
Apply here:
https://commonprefix.notion.site/2b7bf672de828051b53cdd37811...
Chroma is the open-source search and retrieval database for AI applications. It supports dense vector, sparse vector, regex, and full-text search. We support local, single-node, and cloud hosting.
We're a team of 14, all engineers today. We work in Rust, Python, Typescript, and Go.
We're hiring for these areas:
- Product design
- Production engineering
- Platform engineering (Rust)
Apply here: https://jobs.ashbyhq.com/trychroma/9ed3aee8-07dd-44e3-9ca1-d...
More details at: https://careers.trychroma.com
We’re building an AI-first bioinformatics platform to empower life science researchers with agentic AI and LLMs. Backed by pre-seed funding, a government grant, and real demand from biotech and seed companies, we’re looking for versatile engineers to help us shape the future of AI in genomics.
What you’ll do:
• Architect and build AI workflows, agentic interfaces, and data pipelines
• Work across the stack: Go, Python, TypeScript
• Contribute to system design, infrastructure (AWS, Docker, Terraform), and devops
• Collaborate closely with scientists and iterate from prototype to product
• Help define our technical culture and roadmap as a core founding member
Nice-to-haves (not all required): LLM integration, RAG systems, HPC infra, ML, cloud/on-prem hybrid systems
About us: We’re an early team of engineers and scientists with strong academic and industry backgrounds (ex-BCG, PhD in Plant Biotech, M.Sc. AI). We’re committed to building something impactful, technical, and genuinely useful for life science.
Apply: hello@ploid.ai
More about us: https://ploid.ai
We also consider internship requests from strong student candidates.
IMPORTANT: We are now seeking for expertise in frontend / full-stack and PhDs with AI applied to life science bioinformatics (multiomics and/or chem)
Thanks everyone for all the support in our August and September posts! HN really helped finding amazing engineers.
We are MiLaboratories, the team behind Platforma.bio & MiXCR. We are building the "OS for Biology"—a platform that processes terabytes of genomic data to accelerate antibody discovery and drug development.
We are a deep-tech research lab, not a typical SaaS. We work fully on-site in Bilbao because the complexity of our problems (high-performance computing + biological nuances) requires high-bandwidth, in-person collaboration.
We are hiring for two core roles:
1. Senior Go Engineer: You will build distributed systems for high-load genomic data processing. This is not CRUD. We need someone who understands memory management, concurrency, and algorithmic efficiency at scale.
2. Bioinformatics Developer (Antibody Discovery): You will work on the scientific core, developing blocks for NGS data analysis and antibody structure prediction. You should be fluent in both code and biology.
The Offer:
Comp: Top-tier EU salaries (~€90k - €120k).
Tax Advantage: Bizkaia has independent tax autonomy. You qualify for the "Special Impatriate Regime" (30% salary tax exemption + expense deductions).
The Reality: Your effective tax rate drops to ~15-20%, yielding a significantly higher net income than London or Berlin.
Stock: We grant ESOP and treat equity as a life-changing wealth vehicle, not a "nice to have."
Relocation: Comprehensive "Soft Landing" package (Visa, temporary housing, school search).
Location: Bilbao is a hidden gem—ocean, mountains, and high quality of life with a low cost of living.
Process: No HR screening. You will talk directly to the engineering team.
Email me (I am the CEO): stanp@milaboratories.com. Please mention "HN" in the subject and include your GitHub.
Hey HN! I'm Alexander, one of the founders of Hatchet. Hatchet is an open-source platform for running background jobs at scale.
We're hiring engineers who are excited to build the next class of engineering primitives, starting with queues, background tasks and durable execution. We started in early 2024 after launching our distributed task queue (https://news.ycombinator.com/item?id=39643136).
Hatchet is currently used by thousands of engineers for all kinds of workloads: log ingestion pipelines, code review agents, video encoding, GPU scheduling, etc. Our target customer is fast-growing startups who have a strong need for background jobs system. These days, that tends to be AI companies, though we're general-purpose and not exclusively targeted for AI workloads.
Stack: Postgres, Go, Typescript, React, Kubernetes
Apply here: https://www.ycombinator.com/companies/hatchet-run/jobs/SNpCm...
Or email me at alexander [at] hatchet [dot] run
Media platform for businesses. Music, TV, digital signage, ads. Runs in restaurants, bars, retail chains across the country. ~20 engineers, real ownership, backed by Google and UMG.
Stack: Go, Vue, GCP, Kubernetes, NATS (future) for device comms.
Fullstack: Own features end to end. 5+ yrs backend, 2+ yrs frontend, cloud infra. https://grnh.se/kf32f5fk4us Ads: Ad serving, targeting, measurement, data pipelines. Ad tech background helpful (VAST, IMA SDK, SSAI). Distributed systems, SQL. https://grnh.se/f8msf4aw4us
$150K-$210K + equity + benefits.
Questions welcome, or email ryan dot sheppard @ rockbot dot com
We're building business-in-a-box software for landscaping companies, with mobile applications and an offline-capable web app. We're also doing custom AI (_not_ LLMs) to produce measurements from satellite imagery.
Our frontend is in React and React.Native, backend is in Go and Python. We're looking for someone who can lead the backend development and help us manage the data processing pipelines for AI training.
Job posting: https://jobs.lever.co/getduranta/50af551a-9a5c-498c-9729-6f2...
Contact: alex@getduranta.com (please put "HN" in the subject)
Kyber is an open-source SDK and platform to control remote machines, from Remote Desktop to Robots Teleoperation/Teleobservation.
Kyber is a multi-stream and multi-actuator transport in extremely-low latency, over Quic; it encloses the server, the client and the protocol.
One could use Kyber to control robots, drones, desktop, servers in the cloud or just remote rendering of interactive 3D programs. Kyber is done for Remote RealTime, where every millisecond matters.
Kyber is developed by engineers from the VLC and FFmpeg community, and we code in Rust, in C and in assembly. We have some development in Go too.
We're a quite technical team, but cool to work with.
Contact: jobs -- at -- kyber.media (subject: “HN job”)
We're a VC-funded startup (recently raised $51M Series C) building an infrastructure orchestrator and collaborative management platform for Infrastructure-as-Code – from OpenTofu, Terraform, Terragrunt, CloudFormation, Pulumi, Kubernetes, to Ansible.
On the backend we're using 100% Go with AWS primitives. We're looking for backend developers who like doing DevOps'y stuff sometimes (because in a way it's the spirit of our company), or have experience with the cloud native ecosystem. Ideally you'd have experience working with an IaC tool, i.e. Terraform, Pulumi, Ansible, CloudFormation, Kubernetes, or SaltStack.
Overall we have a deeply technical product, trying to build something customers love to use, and have a lot of happy and satisfied customers. We promise interesting work, the ability to open source parts of the project which don't give us a business advantage, as well as healthy working hours.
If that sounds like fun to you, please apply at https://careers.spacelift.io/jobs/3006934-software-engineer-...
You can find out more about the product we're building at https://spacelift.io and also see our engineering blog for a few technical blog posts of ours: https://spacelift.io/blog/engineering
Additionally, we're hiring for a new product we're building, Flows. Mostly the same requirements and tech stack, without the devops bits. You can see a demo of Flows and apply for it here: https://careers.spacelift.io/jobs/6438380-product-software-e...
1. Technical Liaison :
Requirements:
2+ Years of Working in Tech Experience | Good Communication Skills | Bachelors or Equivalent Degree
2. Infrastructure Engineer :
Requirements:
3+ Years of Experience as Infra Engineer | Stack - Python, Go, Kubernetes, GCP/AWS/Azure , Cloudflare
3. Project Lead (UI/UX) :
3 + Years of Project Development Experience | Good understanding of market requirements | A/B Testing | Engineer or similar degree
4. Customer Support Executives [English OR Hindi]
2 Years of Customer Support Experience | Speaking Skills | Ability to follow tasks at hand
5. Marketing Posts (3 Positions)
Experience with Marketing and Advertisement | Out-of-the-box Thinking Ability | Led or Organised Events
Note: Keep the position you're applying for in the title.
Apply via Mail : careers@doshare.me