Posted by whoishiring 1/2/2026
Ask HN: Who is hiring? (January 2026)
Please only post if you personally are part of the hiring company—no recruiting firms or job boards. One post per company. If it isn't a household name, explain what your company does.
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Don't miss this other fine thread: Who wants to be hired? https://news.ycombinator.com/item?id=46466073
We’re building a general AI for humanoid robots using world-model-based reinforcement learning trained on large-scale real-world data.
This is a founding engineer role. You’ll work directly with the founders and own core parts of the training and data systems.
Work - Build data pipelines for large-scale multimodal robot datasets - Scale pre- and post-training runs to large GPU clusters - Improve inference efficiency on low-power embedded systems
Stack: Python, PyTorch, Kubernetes, Ray, Lance, dora-rs
Contact: alex [at] tau-robotics.com
ChainSecurity is a young and innovative cybersecurity company that operates in the blockchain and cryptocurrency space. Our mission is to make the blockchain space secure and trustworthy for people, companies, and governments alike. We are proud of our security experts from the renowned universities ETH Zurich, EPFL Lausanne and others. We are trusted by 100+ blockchain companies and established corporations with security audits and services. We have secured complex systems for top blockchain clients, such as decentralized finance (DeFi) projects, and multinational organizations, such as banks and industrial consortia.
A ChainSecurity Auditor will review the most complex blockchain projects to find vulnerabilities which no-one else can. By using state of the art tools, expert knowledge and a deep understanding of the fundamentals, we secure projects handling billions, often forming the foundation in the new paradigm of an open financial system.
Your Responsibilities:
* Work directly with the developers of the most successful teams in the blockchain industry to audit their code and secure their products
* Contribute to our security tools and create new ones in collaboration with our internal research team
* Conduct security research and publish your findings
Requirements:
* Strong background in software engineering, focused on security relevant areas and most importantly being able to reason about complex code
* Experience with penetration testing, vulnerability scanning, threat modeling or similar is a plus
* Good knowledge of cryptography
* Proficiency with Linux and Git
* Good written communication skills
* Fluent in OOP programming language
Bonus Points:
* Formal Verification, White Box, Vulnerability Scanning
* Solid Blockchain Knowledge
* Consensus Algorithms
Join us here: https://www.chainsecurity.com/jobs/blockchain-security-engin...
Questions about the role? Contact: jobs@chainsecurity.com
Senior iOS Engineer (Berkeley or Irvine): https://swing.vision/careers/52cda8ee-f6e8-433e-8b4b-5bbbce7....
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...
We are applying AI to organize corporate events.
We are looking for a senior engineer with at least ten years of full stack experience, a strong focus on product and UX, and optionally some experience building LLM based products. Currently we are focussed on building tooling that enables us to capture domain knowledge from experts to streamline prompt creation and evaluation. Our tech stack is Typescript, React, Next.js and Tailwind. On the backend we use Drizzle with Neon, deployed and monitored via Vercel. We have pre-seed funding from a major US VC and are experienced founders. You’ll be working alongside the founders (ex-Apple, ex-Airbnb, ex-Tulip, ex-Tourlane) and will have a chance to shape the company, product and of course the engineering culture.
Apply here: https://eventfirst.jobs.personio.com/job/1646275
Beacon AI builds intelligent systems that make aviation safer and more autonomous. We’ve completed multiple DoD programs and are expanding our team with exceptional technical leaders to push the boundaries of human-machine collaboration in the cockpit. At Beacon, you will lead by example, mentoring and growing a small team of talented engineers (typically 1–2 to start) while staying hands-on in design and execution. You’ll help shape critical systems that advance aviation safety and autonomy, working alongside a team that values effort, creativity, and accountability.
We’re hiring Lead Engineers with 5-9 YOE who love solving complex problems. At Beacon, you’ll own your work end-to-end, from prototype to deployment, and literally see your code take flight in real world aviation environments! Roles:
++ Lead iOS Engineer [Tech Stack: Swift, SwiftUI, UIKit, Mapbox]
++ Lead Infra/Backend Engineer [Tech Stack: AWS]
++ Lead WebApp/FrontEnd Engineer [Tech Stack: Python, Typescript, React]
++ Lead Autonomy/Robotics Engineer [Tech Stack: C++, Python, iOT]
++ Lead Security Software Engineer [Skills: Ability to perform hands-on security engineering tasks, CMMC Compliance Knowledge]
Join us at beaconai.co/careers. Mention in the application that you saw our post on HN.
Cosuno is a fast-growing tech startup reshaping the construction industry with a digital platform for procurement. We use AI to analyze millions of price points, helping construction companies create bids based on real market data. We're looking to expand our team with creative minds who want to solve real-world problems and impact a massive industry. We are an open-minded, collaborative, and international team.
Currently, we're hiring for two key senior roles:
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Senior Full Stack Developer (TypeScript)
Location: Remote (EU) / Berlin
Stack: TypeScript, React, Node.js, Cypress, Kubernetes, AWS
Mission: Take full ownership of features, shaping both the frontend and backend of our product. You'll have the responsibility to extend and build upon our platform to make it more valuable, reliable, and maintainable. We value a trunk-based development workflow with daily releases, comprehensive end-to-end testing, and a solid CI/CD pipeline.
You have: 5+ years of hands-on engineering experience, substantial expertise in JavaScript/TypeScript, and experience with Node.js (React is a plus).
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Senior AI Engineer – LLMs & Agents
Location: Remote (EU) / Berlin
Mission: You will build agentic workflows using state-of-the-art LLMs. Lead the technical development of an agent that helps construction professionals process, improve, and validate complex construction documents. A key part of your role will be establishing and enforcing MLOps and LLMops best practices.
You have: 5+ years of engineering experience, with at least one year working with LLMs. You possess strong Python skills, a proven track record of deploying containerized services (Docker, Kubernetes), and deep expertise in at least one of the following: deep learning (PyTorch, Transformers), ranking/matching algorithms, or LLMops (RAG, evals, fine-tuning).
Interested? To apply and for more detailed information, please see the full job descriptions on our careers page: https://www.cosuno.com/en/company