Category Labs | https://www.category.xyz/ | Remote and NYC | Full Time | $200K USD+ Category Labs (formerly known as Monad Labs) is a team of systems engineers and researchers on a mission to design and build at the frontier of decentralized technology. We strive to design and build step-function improvements over existing blockchain solutions. After raising $225M in series A funding, led by Paradigm, we are growing our team.

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...

Continua AI | https://continua.ai | Multiple Roles | ONSITE (NYC/Seattle) | Full-time | Salary + Equity

At Continua (http://continua.ai/), we're on our way to solving Social AI, and we're expanding our team! We've built an AI agent that users can invite into group conversations to make planning, coordination, and information retrieval effortless. We're social creatures and it just seemed to us a huge opportunity to bring AI into group settings. We've seen strong retention over the last few months and want you to help us bring our product to the next level. Try adding our agent at http://continua.ai/ to group chats and kick the tires! https://techcrunch.com/2025/08/12/google-vet-raises-8m-for-c...

I’m David (https://www.linkedin.com/in/dpetrou/), the founder and CEO. Before starting Continua, I was a Distinguished Software Engineer at Google. We’re backed by top-tier VCs (like GV) and incredible angel investors (like Jeff Dean). Our team is a fantastic bunch (http://continua.ai/team) of accomplished engineers and researchers from Google, Disney, and several AI startups. We're pretty clued in on the technology side and have a strong vision of how the transformative technology of the last few years along with our own secret sauce (not just a ChatGPT wrapper) can help a huge number of people.

We’re hiring systems and ML engineers: https://jobs.ashbyhq.com/continua/

You'll work on building and improving the best LLM group chat experience there is, including fine-tuning models to boost conversational quality and improve scalability and identifying novel ways to build a "memory" which leads to a personalized and unique experience for our users. You understand what it means to work at a fast-moving startup.

Oh, and we maintain a vibrant blog, including items of technical interest, at http://blog.continua.ai/. Check it out! :)

David

Tandem Health | Senior/Staff Software Engineers | On-site in Stockholm, Sweden | Full time

At Tandem Health we're building a clinician copilot to allow clinicians to focus on care rather than administration. We’re building, launching and iterating quickly, and are already rolling out across some of the largest care chains across Europe, including most of the NHS.

Our core product listens in to the patient-clinician encounter to generate medical records, allowing clinicians to save 5-10 minutes per patient. No longer do clinicians have to catch up on administration after hours. Some even tell us that their partners notice they're much more relaxed after starting to use our product, and we couldn't be happier :)

We’re expanding our Stockholm team with exceptional engineers! We use Python (backend), TypeScript/React (frontend) and C# (Windows app) and our infrastructure runs on Kubernetes in Azure. We’re especially keen to talk to Staff Engineers (backend) and Senior AI Engineers (e.g. LLMs and the scaffolding around, computer-use agents)

Even if we don’t have a role out your specific skill set, we’d love to talk! Our tech team is small but growing and you’ll have an outsized impact on an important problem.

More info at https://www.tandemhealth.ai/recruitment

Feel free to reach out to john.moberg@tandemhealth.ai if you have any questions

Unto Labs | San Francisco, CA | ONSITE (Hybrid OK), REMOTE (US) | Full-Time Unto Labs is developing the Thru Layer-1 blockchain (https://thru.org)

We recently announced $14.4 million in funding to make blockchains & digital assets useful for the world. Founded by Jump Crypto alumni and core contributors to the Solana protocol and the Firedancer client (https://github.com/firedancer-io/firedancer), we’re tackling fundamental scalability, performance, and usability challenges in distributed ledgers.

Our runtime conforms to the RISC-V specification—moving away from domain-specific VMs, DSLs, and bespoke compiler toolchains that limit developer and institutional adoption. You can write smart contracts and programs in any LLVM compatible programming language and reason about a standard ISA in RISC-V. Components are developed in C for maximal control over performance and resource usage.

We believe there is a unique window of opportunity to developer fairer, more accessible, and more global financial products on resilient public blockchains.

You can check out our docs and open-source developer tooling at docs.thru.org and https://github.com/Unto-Labs/thru/

We are hiring for the following role(s):

- Systems Engineer: https://jobs.ashbyhq.com/unto-labs/13df6bea-b253-4c80-ae05-5...

MaFi Games | Senior SWE/Game dev | Contract preferred | Remote | C#

Hi, I’m the co-founder of MaFi Games – an indie studio behind the game Captain of Industry. We are a small but passionate team who gave up their jobs at Google and Nvidia to pursue building the best factory simulation game possible, and we need more hands!

We are looking for an experienced software engineer to grow the team and accelerate our progress. We strongly prefer candidates with a background in game development, experience with 3D graphics, and performance optimizations.

Some reasons you’d enjoy working with us:

* A multicultural, collaborative, and innovative work environment where your voice is heard.

* Fully remote job with flexible working hours and vacation schedule.

* Long-term full-time collaboration (not a fixed-term contract).

* High quality C# code base, code reviews, tests.

* High work satisfaction, work on a popular video game with a wonderful community.

* No bureaucracy, 1 regular meeting per week.

As an example of our technical work see https://www.captain-of-industry.com/post/cd-31. We also have a unique signal-free train system: https://www.captain-of-industry.com/post/cd-46

If interested, please see the detailed info,requirements, and application instructions at https://www.captain-of-industry.com/jobs, thanks!

Note: We are also looking for a 2D game UI/UX designer and a SFX artist.

Trinsic | Software Engineer | REMOTE (North America) | Full‑time

We’re building the first Identity Acceptance Network—the “Visa for ID.” Humanity is editing genes, starting space tourism and working on artificial intelligence. Meanwhile, identity verification is still done by taking pictures of plastic cards . We’re bringing identity into this new age, where trust is essential and becoming more so every day with AI. We enable accepting digital IDs that users already have (mDLs, BankIDs, reusable IDs) and verify users ~10x faster across 40+ networks covering 500M+ people.

Role

- Software Engineer (#5 on the team; ~20% of eng capacity). High ownership, product-minded, backend and systems leaning.

- You’ll ship fast, prune scope, and help shape our engineering culture.

- You’ve thrived in early-stage environments, can tackle fires independently, and care as much about product as code.

- Strong backend experience; generalist who enjoys moving up/down the stack.

- You care deeply about user privacy and data security.

Stack & ways of working

- .NET (C#) backend, React + TypeScript frontend, Azure, GitHub CI/CD.

- Remote‑first in North America; strong async work habits; <5 hrs/week of recurring meetings; frequent pairing/huddles.

- We’re keen but responsible adopters of AI tooling to hit our high bar of excellence.

Comp & benefits

- Salary set by a transparent formula (we target ~60th percentile cash for our stage) + meaningful equity, usually 90th+ percentile for a startup of our stage.

- Premium US healthcare (75% of premiums covered for you & dependents), at least 15 days PTO, $900/yr fitness stipend, $350/mo coworking or $200/mo home office, first week is “Think Week” to help you transition into your new role, paid family leave, top‑tier laptop, twice‑yearly in‑person offsites.

Learn more / apply

- JD: https://trinsic.notion.site/Software-Engineer-163b6be993cd80...

- Comp philosophy: https://trinsic.notion.site/Compensation-Philosophy-bf9b66a5...

- Working at Trinsic: https://trinsic.notion.site/Work-at-Trinsic-0faef9dbfbd84627...

How to get in touch

Reply with your GitHub/LinkedIn + a few lines on what you’ve built, or email jp@trinsic.id.

If you’re North America‑based and excited about identity, I’d love to talk.

JP, CTO @ Trinsic

Beacon AI | San Carlos, CA | Hybrid (On-Site) | Full-Time | www.beaconai.co

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.

Tosoo | https://tosoo.ch | Zurich (Switzerland)

We are looking for a motivated Junior Generalist Software Engineer to join the Tosoo team. In this role, you will contribute across the entire technology stack; designing, developing, validating, and operating software components that power our products and infrastructure. Our stack includes a C++ embedded system, a Python-based data analysis framework, several Python and Go cloud services, and PostgreSQL databases. Strong competence in at least one of these areas is required, along with a curious, hands-on attitude and an eagerness to learn and work across the rest of the stack. At Tosoo, you’ll be part of a small, fast-paced team that values initiative, technical curiosity, and collaboration. We aim to make a meaningful difference in the world by maximizing the impact of each team member. We would love to hear from you! Please send us your CV along with a short cover letter describing (or just linking to) two projects: one that represents your most ambitious technical achievement (something challenging or complex, even if the code isn’t perfect), and another that showcases your most refined or professional work (something where code quality and craftsmanship were your focus).

hiring@tosoo.ch

DN Institute | Software Engineer | Full Remote (World)

Distributed Networks Institute’s mission is to achieve sustainable technological growth and resilience by leveraging scientific, engineering, and organizational principles of distributed networks. We are a part of a 501(c)3 non-profit incubator in Washington DC called BlockShop.

We just released a paid Software Development challenge with a monetary bounty and a chance to become part of our team. It involves improving a Telegram Connector, deployed on Cloudflare Workers (JS + Python). You can find the full description and more information about challenge program in the Github issue here: https://github.com/1712n/dn-institute/issues/491