Hotwash | Founding Engineer (→ CTO for the right person) | REMOTE (US), Boston a plus | Full-time
I'm a solo founder. I built the entire product myself, got 11 fire departments paying with zero churn, and now I need someone to own engineering so I can't be the only one who does. West Point, Ranger Regiment, Yale Law, still the only developer.
What we do: Hotwash is an after-action review platform for fire departments. After a serious call, crews record what happened, we transcribe and structure it, and the hard-won lessons become searchable institutional memory instead of retiring when the veterans who earned them do. Fire is the wedge; the long game is operational learning for any high-reliability organization.
Traction: $40K ARR, 11 paying fire departments, zero churn. Raising a $1M pre-seed.
The role: Employee #1 on engineering. You own the codebase, architecture, and UX end to end, and you lead the rebuild off the current stack. You work directly with me on what gets built and why, including sitting with fire chiefs to figure out what they actually need. For the right person this becomes the CTO seat.
Who I'm looking for: A full-stack engineer who ships simple, usable products and has a real eye for design. Our users are fire crews, not power users, so the bar is "obvious to someone who's never seen it." If you care about how software feels, not just whether it works, this is your seat.
Stack: Today it's FlutterFlow + Firebase, Node, with Groq/AssemblyAI for transcription and Gemini for summarization. The rebuild target is React Native (Expo), Cloudflare Workers, D1, R2. You'd own that migration, so this is real greenfield ownership, not maintenance.
Comp: Founding equity, scaled to scope.
We're pre-raise, so cash is lean right now and grows when we close.
Email hiring@hotwash.com with a resume, link to something you've built, and one line on why this interests you.
Zulip is building the world’s best collaboration platform, and we’re committed to keeping it 100% open source. Zulip is the only modern team chat app designed for both live and asynchronous conversations. Our product serves as the communication hub for businesses, open-source projects, educators and communities around the world.
We’re looking for a senior backend/infrastructure engineer to join our small core team and build, operate, and scale Zulip — both as we run it on Zulip Cloud, and as thousands of self-hosters run it themselves. The Senior Backend/Infrastructure Engineer will work across backend features, performance, and infrastructure; review code from both staff and open-source contributors; and share responsibility for keeping Zulip Cloud production healthy. You will also have the opportunity to provide technical direction and mentorship to the team.
Check out https://zulip.com/jobs/ to learn more about this and other opportunities at Zulip, and apply at jobs@zulip.com.
kimvandiver
Hatchet | Full-Stack Engineer | NYC or SF or REMOTE (US and EU) | https://hatchet.run
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.
Applying: email me at alexander@hatchet.run and tell me about something impressive you've built, along with your CV and why you're interested in Hatchet.
Note that we're fully open-source, which you can check out here: https://github.com/hatchet-dev/hatchet (and if you have thoughts / opinions / questions about the codebase, please include those in your note!)
abelanger
Adacore | Software Engineers | Full-time | Remote or On-Site
Adacore is the maintainer of GNAT, GCC's Ada frontend (but now with many more compiler backends: LLVM, Why3, JVM...) and of a lot of tools revolving around the Ada ecosystem (IDEs, Coverage tools, Fuzzers, Static Analyzers, Formal proof tooling...). Evertything we build is open-source and we make money by providing support, trainings, certifications...
Please apply through the website. I am in the Static Analysis team, so I can answer questions if you have any. Also, if you feel like you would be a strong candidate (e.g. you have working experience with abstract interpretation) but are missing some of the requirements (e.g. not in the right location or only three years of experience instead of five etc) and this is making you hesitate to apply, please contact me - I'm just a lowly engineer far removed from the hiring pipeline but I'd love to hear for you and try to convince HR that you could be a good fit :).
glacambre
PostHog | Full-Time | Product engineers, Technical CSMs, Forward deployed engineers | REMOTE (all remote) | Hiring GMT-8 to GMT+2 PostHog makes dev tools that help product engineers build successful products.
* we have a public handbook (posthog.com/handbook) if you want to learn how we work, pay and more in complete detail.
* we are growing through more autonomy and transparency not through process.
* we have a ton of scale and a bunch of super interesting technical problems to solve
* we're building 20 more products over the next couple of years, so you could end up building one of those
* public compensation calculator! see immediately what you'd get paid
UPDATE: This posting is now closed and not accepting further applications.
Branch3D | Senior Developer (Full-stack), 3D Design engineer, Growth lead | Vancouver (REMOTE, North America / South America) | Full-time
Branch is taking on real-time structural design and analysis. Design software for Architecture, Engineering, and Construction (AEC) has been archaic for too long, and we're building a novel 3d structural modeling and design tool with real-time design feedback and performance as a focus. We're taking ambitious technical swings! Our team is less than 10, we're incubated within a larger structural engineering firm and leveraging real project expertise. We're in pilot programs with key customers right now, and hiring to scale out to a larger audience. Your ideas will help shape the future of how our product evolves, regardless of role.
We're looking for folks with deep technical experience for developer roles (AEC background not required), or deep industry experience for the GTM side of things. In particular, our design engineer role focuses on a mix of 3d design & front-end experience, with a focus on quality.
If Branch sounds like your jam, apply via email - dcascaval@branch3d.com, HN in the subject line. Include a resume, any open source or portfolio projects if applicable, and a couple sentences of relevant experience.
Runway is building AI to simulate the world — merging art and science. We're a team of researchers, engineers, artists, and designers shipping the models and infrastructure behind a new generation of creative tools.
We're hiring across a lot of teams right now (engineering, research, product, design — see the full list below), but a few we'd especially love to talk to you about:
- Engineering Manager, API — https://jobs.ashbyhq.com/runway-ml/b5d136bb-4143-400b-914a-0ae7377ad8ed
- MTS, Backend Engineer, API — https://jobs.ashbyhq.com/runway-ml/8489a08a-f0cf-4418-968c-c7c803d538bc
- MTS, Research Engineer — https://jobs.ashbyhq.com/runway-ml/98e4b160-3bbe-4acd-b106-ad75ccc49675
Remote-friendly globally, with offices in NYC, SF, Seattle, London, Tel Aviv, and Tokyo. Full benefits (100% medical/dental/vision for US employees, unlimited PTO, parental leave, learning stipend).
DrSwarm | Founding Engineer (Full-Stack) | REMOTE (US or LATAM; must overlap with US Pacific hours) | Full-time or Contract to Full-time
DrSwarm is building AI-driven workflow automation for healthcare clinics / health systems (scheduling, RCM/billing workflows, patient ops). This is a true 0→1 role: ship fast, talk to customers, own systems end-to-end.
Looking for: Strong full-stack builder. Good to work with. Can talk to customers / users / salespeople. Uses AI to generate 90%+ of their code, interested in AI + Healthcare.
Comp: Market with mix of base + bonus + meaningful equity
Process: 30m intro → 60m technical/product deep dive → short paid work trial → references. I (founder) read every email and reply.
FusionAuth | Principal Software Engineer, Senior Java Engineer - Cloud, Account Executive, Solutions Engineer | Varies between REMOTE (in USA, also in Europe but only for the account exec/solutions engineer positions) and ONSITE in Denver, CO, USA, details in each job desc | Salary ranges for the Principal Software Engineer it is 225k-270k, but the Euro positions don't have them :(
At FusionAuth, our mission is to make authentication and authorization simple and secure for every developer building web and mobile applications. We want devs to stop worrying about auth and focus on building something awesome.
There are a lot of companies in the auth space, but we feel like we have something special:
* a relatively unique deployment model (self-host on-prem, run in your cloud or let us operate it for you in ours)
* A well designed API first approach; one customer compared our APIs to petrichor
* a mature product (the code base is nine+ years old and we've found and fixed a lot of the sharp edges around core login use cases; but don't worry, there are plenty more features to add)
* a full featured free-as-in-beer version which makes the sales cycle easier; prospects often come in having prototyped an integration
Our core software is commercial. We open source much of our supporting infrastructure. Technologies and standards that you will work with: modern Java, PostgreSQL, Docker, Kubernetes, MySQL, OAuth, SAML, OIDC.
Learn more, including benefits and salaries, and apply here: https://fusionauth.io/careers/ ( Click/tap the 'View open positions' orange button. )
Cambridge, MA, USA (metro Boston) | ONSITE strongly preferred; REMOTE (US east coast) possible for exceptional candidates
SecureBio is a nonprofit working to protect the world from catastrophic pandemics. We operate the world’s largest metagenomic biosurveillance network, which performs daily sequencing of wastewater samples and nasal swabs to screen for emerging pathogens. Our computational team develops detection pipelines responsible for rapid processing of deep sequencing data in order to flag potential threats.
Prior experience with biology or bioinformatics is not required. If you're interested, please apply via the relevant job posting. Feel free to drop me a line with questions; email is in my profile.
comments (10)
I'm a solo founder. I built the entire product myself, got 11 fire departments paying with zero churn, and now I need someone to own engineering so I can't be the only one who does. West Point, Ranger Regiment, Yale Law, still the only developer.
What we do: Hotwash is an after-action review platform for fire departments. After a serious call, crews record what happened, we transcribe and structure it, and the hard-won lessons become searchable institutional memory instead of retiring when the veterans who earned them do. Fire is the wedge; the long game is operational learning for any high-reliability organization.
Traction: $40K ARR, 11 paying fire departments, zero churn. Raising a $1M pre-seed.
The role: Employee #1 on engineering. You own the codebase, architecture, and UX end to end, and you lead the rebuild off the current stack. You work directly with me on what gets built and why, including sitting with fire chiefs to figure out what they actually need. For the right person this becomes the CTO seat.
Who I'm looking for: A full-stack engineer who ships simple, usable products and has a real eye for design. Our users are fire crews, not power users, so the bar is "obvious to someone who's never seen it." If you care about how software feels, not just whether it works, this is your seat.
Stack: Today it's FlutterFlow + Firebase, Node, with Groq/AssemblyAI for transcription and Gemini for summarization. The rebuild target is React Native (Expo), Cloudflare Workers, D1, R2. You'd own that migration, so this is real greenfield ownership, not maintenance.
Comp: Founding equity, scaled to scope.
We're pre-raise, so cash is lean right now and grows when we close.
Email hiring@hotwash.com with a resume, link to something you've built, and one line on why this interests you.
rpuritty
Zulip is building the world’s best collaboration platform, and we’re committed to keeping it 100% open source. Zulip is the only modern team chat app designed for both live and asynchronous conversations. Our product serves as the communication hub for businesses, open-source projects, educators and communities around the world.
We’re looking for a senior backend/infrastructure engineer to join our small core team and build, operate, and scale Zulip — both as we run it on Zulip Cloud, and as thousands of self-hosters run it themselves. The Senior Backend/Infrastructure Engineer will work across backend features, performance, and infrastructure; review code from both staff and open-source contributors; and share responsibility for keeping Zulip Cloud production healthy. You will also have the opportunity to provide technical direction and mentorship to the team.
Check out https://zulip.com/jobs/ to learn more about this and other opportunities at Zulip, and apply at jobs@zulip.com.
kimvandiver
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
Applying: email me at alexander@hatchet.run and tell me about something impressive you've built, along with your CV and why you're interested in Hatchet.
Note that we're fully open-source, which you can check out here: https://github.com/hatchet-dev/hatchet (and if you have thoughts / opinions / questions about the codebase, please include those in your note!)
abelanger
Adacore is the maintainer of GNAT, GCC's Ada frontend (but now with many more compiler backends: LLVM, Why3, JVM...) and of a lot of tools revolving around the Ada ecosystem (IDEs, Coverage tools, Fuzzers, Static Analyzers, Formal proof tooling...). Evertything we build is open-source and we make money by providing support, trainings, certifications...
We are looking for different profiles:
- GCC/GNU toolchain developpers ( https://app.hellotalent.com/vacancy/gnu-toolchain-developer-... )
- Senior Static Analysis Software Engineer ( https://app.hellotalent.com/vacancy/senior-static-analysis-s... )
Please apply through the website. I am in the Static Analysis team, so I can answer questions if you have any. Also, if you feel like you would be a strong candidate (e.g. you have working experience with abstract interpretation) but are missing some of the requirements (e.g. not in the right location or only three years of experience instead of five etc) and this is making you hesitate to apply, please contact me - I'm just a lowly engineer far removed from the hiring pipeline but I'd love to hear for you and try to convince HR that you could be a good fit :).
glacambre
* we have a public handbook (posthog.com/handbook) if you want to learn how we work, pay and more in complete detail.
* we are growing through more autonomy and transparency not through process.
* we have a ton of scale and a bunch of super interesting technical problems to solve
* we're building 20 more products over the next couple of years, so you could end up building one of those
* public compensation calculator! see immediately what you'd get paid
* we're hiring: product engineers, clickhouse operations engineer, backend engineers, technical customer success managers, technical account managers, developer marketers, forward deployed engineers and onboarding engineers.
https://posthog.com/careers
james_impliu
Branch3D | Senior Developer (Full-stack), 3D Design engineer, Growth lead | Vancouver (REMOTE, North America / South America) | Full-time
Branch is taking on real-time structural design and analysis. Design software for Architecture, Engineering, and Construction (AEC) has been archaic for too long, and we're building a novel 3d structural modeling and design tool with real-time design feedback and performance as a focus. We're taking ambitious technical swings! Our team is less than 10, we're incubated within a larger structural engineering firm and leveraging real project expertise. We're in pilot programs with key customers right now, and hiring to scale out to a larger audience. Your ideas will help shape the future of how our product evolves, regardless of role.
We're looking for folks with deep technical experience for developer roles (AEC background not required), or deep industry experience for the GTM side of things. In particular, our design engineer role focuses on a mix of 3d design & front-end experience, with a focus on quality.
Postings with more details at https://www.branch3d.com/careers.
If Branch sounds like your jam, apply via email - dcascaval@branch3d.com, HN in the subject line. Include a resume, any open source or portfolio projects if applicable, and a couple sentences of relevant experience.
Syntheticate
Runway is building AI to simulate the world — merging art and science. We're a team of researchers, engineers, artists, and designers shipping the models and infrastructure behind a new generation of creative tools.
We're hiring across a lot of teams right now (engineering, research, product, design — see the full list below), but a few we'd especially love to talk to you about:
Remote-friendly globally, with offices in NYC, SF, Seattle, London, Tel Aviv, and Tokyo. Full benefits (100% medical/dental/vision for US employees, unlimited PTO, parental leave, learning stipend).Full list of open roles: https://runwayml.com/careers
codeviking
DrSwarm is building AI-driven workflow automation for healthcare clinics / health systems (scheduling, RCM/billing workflows, patient ops). This is a true 0→1 role: ship fast, talk to customers, own systems end-to-end.
You will: - Build product end-to-end (Next.js + Django) - Ship integrations + workflow automation (APIs, webhooks, background jobs, queues) - Own reliability (logs/metrics, retries, failure modes) and pragmatic security (HIPAA-aware)
Stack: Next.js, React/TypeScript, Django/Python, Postgres, Celery/Redis, Docker, AWS/DigitalOcean, LLM APIs.
Looking for: Strong full-stack builder. Good to work with. Can talk to customers / users / salespeople. Uses AI to generate 90%+ of their code, interested in AI + Healthcare.
Comp: Market with mix of base + bonus + meaningful equity Process: 30m intro → 60m technical/product deep dive → short paid work trial → references. I (founder) read every email and reply.
Contact: jobs@drswarm.com (include “HN Founding Engineer” in subject) + GitHub/LinkedIn + 2–3 projects you’re proud of.
Skeletor
At FusionAuth, our mission is to make authentication and authorization simple and secure for every developer building web and mobile applications. We want devs to stop worrying about auth and focus on building something awesome.
There are a lot of companies in the auth space, but we feel like we have something special:
* a relatively unique deployment model (self-host on-prem, run in your cloud or let us operate it for you in ours)
* A well designed API first approach; one customer compared our APIs to petrichor
* a mature product (the code base is nine+ years old and we've found and fixed a lot of the sharp edges around core login use cases; but don't worry, there are plenty more features to add)
* a full featured free-as-in-beer version which makes the sales cycle easier; prospects often come in having prototyped an integration
Our core software is commercial. We open source much of our supporting infrastructure. Technologies and standards that you will work with: modern Java, PostgreSQL, Docker, Kubernetes, MySQL, OAuth, SAML, OIDC.
Learn more, including benefits and salaries, and apply here: https://fusionauth.io/careers/ ( Click/tap the 'View open positions' orange button. )
mooreds
Cambridge, MA, USA (metro Boston) | ONSITE strongly preferred; REMOTE (US east coast) possible for exceptional candidates
SecureBio is a nonprofit working to protect the world from catastrophic pandemics. We operate the world’s largest metagenomic biosurveillance network, which performs daily sequencing of wastewater samples and nasal swabs to screen for emerging pathogens. Our computational team develops detection pipelines responsible for rapid processing of deep sequencing data in order to flag potential threats.
I'm the hiring manager for two roles:
- Senior infrastructure engineer, to own cloud infra, devops, CI/CD, AWS security, etc. https://securebio.org/careers/2026-cloud-infra-engineer/
- [Senior] software engineer focused on high performance data pipelines. https://securebio.org/careers/2026-software-engineer-pipelin...
Prior experience with biology or bioinformatics is not required. If you're interested, please apply via the relevant job posting. Feel free to drop me a line with questions; email is in my profile.
https://securebio.org/careers/
Tarrosion