Clearspace  Is Hiring a Founding Network Engineer (VPN and Proxy)

Keystone  is hiring engineer #1 to automate coding

Uplane  Is Hiring Founding Engineers (Full-Stack and AI)

Depot  Is Hiring an Enterprise Support Engineer (Remote/US)

Raycaster (raycaster.ai) (YC F24) builds a document IDE for high-stakes, regulated work in life sciences (CMC &#x2F; quality &#x2F; regulatory). The product turns messy, versioned documents (PDFs, Word redlines, tables) into a structured workspace where agents can search, cite, reconcile changes, and help draft.We’re hiring a Research Engineer who can both (1) ship production systems and (2) help define the research direction for the company. There’s room to publish technical deep dives, benchmarks, and papers from day 0.What you’ll do:
- Build and ship core agent workflows: orchestration, retrieval, tool use, guardrails, evals
- Work on document pipelines + versioning + reliability&#x2F;observability
- Turn research ideas into production features (and sometimes the other direction)
- Help design benchmarks&#x2F;datasets for high-stakes document tasks; potentially publishWhat we’re looking for:
- Strong engineering fundamentals (distributed systems &#x2F; performance &#x2F; reliability)
- Comfortable implementing and iterating on evaluation (not just demos)
- Product taste: you notice UX details and can build end-to-end
- Able to learn a domain quickly and ask sharp questionsNice to have:
- Prior publications, open-source, or technical writingLogistics:
- NYC (Hudson Yards), in-person 5 days&#x2F;week
- Compensation: base + founder-level equity (details in process)To apply, email: founders [at] raycaster.ai
Include: a link to work you’ve shipped (GitHub&#x2F;projects) and 1–2 examples of research&#x2F;evals you’ve built (can be informal).

Raycaster  Is Hiring a Research Engineer (NYC, In-Person)

Delty  Is Hiring an ML Engineer

Hightouch  Is Hiring

Flick  Is Hiring Founding Engineer to Build Figma for AI Filmmaking

Subsets  is hiring engineers in Copenhagen, Denmark

Sei AI  is hiring an LLM Engineer (India, in-office, Chennai, Gurgaon)

Artie  Is Hiring Senior Enterprise AES

Cekura  Is Hiring

Rollstack  is hiring multiple software engineers (TypeScript) US/Canada

Optery  Hiring CISO, Release Manager, Tech Lead (Node), Full Stack Eng

EasyPost  Is Hiring

Motion  Is Hiring Senior Staff Front End Engineers

Almond  Is Hiring SWEs and MechEs

9 Mothers  Is Hiring

Clearspace  Is Hiring a Founding Designer

Legion Health (YC S21) operates a psychiatric practice and is building the AI-native operations layer for mental health care. We focus on the operational backend: scheduling, intake, documentation, billing, and care coordination. These workflows—not diagnostics—are the main bottlenecks in mental health delivery.We run our own clinic, so the systems you build ship directly into real patient care. Our agent infrastructure currently supports more than 2,000 patients with one human support lead.We’re hiring a Founding Engineer (in-person, San Francisco). You’d work directly with the founders on:event-driven backend systems (Node.js, TypeScript, Postgres&#x2F;Supabase, AWS)LLM agent tooling (tool use, retries, memory, context management)internal operations tools for both humans and agentsstate&#x2F;coordination logic that represents a patient’s journeyHIPAA-compliant data and audit pipelinesWe’re open to backend or full-stack&#x2F;product engineers who think in systems and have owned real workflows end-to-end. Prior experience with LLMs is optional; interest is required.Details: full-time, in-person SF, salary $130k–$180k, equity 0.1–0.6%.Apply here:
<a href="https:&#x2F;&#x2F;www.ycombinator.com&#x2F;companies&#x2F;legion-health&#x2F;jobs&#x2F;oc6nPUu-founding-engineer-ai-native-ops-infrastructure-yc-s21-2m-arr-6-3m-raised">https:&#x2F;&#x2F;www.ycombinator.com&#x2F;companies&#x2F;legion-health&#x2F;jobs&#x2F;oc6...</a>

Legion Health  is hiring a founding engineer (SF, in-person)

Nango  is hiring back-end engineers and dev-rels (remote)

Truemetrics  Is Hiring

Infisical  Is Hiring Engineers to Build the Modern OSS Security Stack

Infracost  is hiring Sr Node Eng to make $600B/yr cloud spend proactive

Hey HN! I&#x27;m Daniel, building Onlook, the Cursor for Designers. We built an open-source collaborative canvas for code that lets designers and developers craft incredible web experiences together.Since launching, Onlook hit #1 on Hacker News, was the #1 trending repo on GitHub—above DeepSeek + Anthropic—and has earned over 23,000 GitHub stars. We’re looking to bring on Onlook’s first Founding Engineers.This role requires autonomy - you’ll be setting standards for one of the fastest-growing open source projects backed by YC ever. You’ll help design and build an uncompromising visual IDE loved by tens of thousands of designers and engineers around the world, and you&#x27;ll have a heavy influence on the direction of where we take the company.You’re a full-stack engineer based in the U.S. who is ultra comfortable in Typescript, NextJS, React, and Tailwind, and ready to jump-in and build.The most important things we look for:• Olympic-level dedication – you want to be the best in the world at what you do.• Ownership – you like autonomy and control over the destiny of the company.• Speed – you’re comfortable shipping and iterating quickly with feedback.• Craft – you’re opinionated and are willing to defend your opinions.Ideally, you:• Are looking for a fast-paced, early startup environment.• Are willing to put in long hours and go the extra mile.• Are comfortable with any part of the stack, front-end, back-end, or database.• Believe in open source and are ok with your work being very public.The comp range for this role is $130k-200k, 1-5% equity, great healthcare + other perks, and an awesome office if you happen to be in SF. We&#x27;re open to remote &#x2F; hybrid candidates.If you’d like to stand out, please share a project or piece of work that you’re most proud of. We love seeing people’s work. If you have a personal website, please include that as well.If you&#x27;re interested, email daniel@onlook.com with your Github &#x2F; LinkedIn &#x2F; Website or work samples and why you&#x27;d be a great addition to the team, or apply here: <a href="https:&#x2F;&#x2F;www.ycombinator.com&#x2F;companies&#x2F;onlook&#x2F;jobs&#x2F;e4gHv1n-founding-engineer-fullstack">https:&#x2F;&#x2F;www.ycombinator.com&#x2F;companies&#x2F;onlook&#x2F;jobs&#x2F;e4gHv1n-fo...</a>Excited to meet, and build alongside you!

posted by	title	time	batch	link
anteloper	Clearspace Is Hiring a Founding Network Engineer (VPN and Proxy)	Clearspace Is Hiring a Founding Network Engineer (VPN and Proxy)	2 days ago	W23
pablo24602	Keystone is hiring engineer #1 to automate coding	Keystone is hiring engineer #1 to automate coding	3 days ago	S25
MarvinStarter	Uplane Is Hiring Founding Engineers (Full-Stack and AI)	Uplane Is Hiring Founding Engineers (Full-Stack and AI)	5 days ago	F25
jacobwg	Depot Is Hiring an Enterprise Support Engineer (Remote/US)	Depot Is Hiring an Enterprise Support Engineer (Remote/US)	7 days ago	W23
levilian	Raycaster Is Hiring a Research Engineer (NYC, In-Person)	Raycaster Is Hiring a Research Engineer (NYC, In-Person)	8 days ago	F24
lalitkundu	Delty Is Hiring an ML Engineer	Delty Is Hiring an ML Engineer	9 days ago	X25
joshwget	Hightouch Is Hiring	Hightouch Is Hiring	10 days ago	S19
rayruiwang	Flick Is Hiring Founding Engineer to Build Figma for AI Filmmaking	Flick Is Hiring Founding Engineer to Build Figma for AI Filmmaking	10 days ago	F25
Oliverbrandt	Subsets is hiring engineers in Copenhagen, Denmark	Subsets is hiring engineers in Copenhagen, Denmark	11 days ago	S23
ramkumarvenkat	Sei AI is hiring an LLM Engineer (India, in-office, Chennai, Gurgaon)	Sei AI is hiring an LLM Engineer (India, in-office, Chennai, Gurgaon)	11 days ago	W22

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