Ask HN: Who is hiring? (July 2026)

airCFO (https://aircfo.com) | Founding Engineer | Remote, UTC -8 - UTC +2 | Full-time, part-time possible for the right candidate

airCFO is an AI-powered accounting & finance services partner to 300+ startups (current/former clients include Anthropic, Replit, Harmonic), and we are building a platform to supercharge our service's capabilities. We're hiring a founding engineer to build the systems behind it: a retrieval/RAG context layer over all our tools, and the internal apps (TypeScript, Node, Python/FastAPI, React, Postgres, Claude + MCP) our teams use daily. We want someone senior who drives coding agents hard but refuses to lose the plot — clean architecture and a real mental model of the whole system. Production RAG/agents a plus, not a requirement. You'd report to a hands-on fractional CTO; small team, high autonomy.

filled

Weave Bio | Full time | https://weave.bio/careers | Series A Weave Bio has developed an AI-native platform to help research and discovery scientists get through the FDA regulatory submissions process 97% faster!

- Staff Frontend Engineer (react.js)

- Senior AI Engineer (LLMs in production, python, RAG)

- Senior Customer Success Manager (B2B SaaS)

- Director of Sales (player-coach for 4+ Account Executives)

Please apply here: https://job-boards.greenhouse.io/weave

San Francisco (SF), Hybrid/Onsite 3 days/week (Tues/Wed/Thurs)

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Cascade Space (YC P25) | San Francisco, CA - ONSITE | Full-time | Senior Mechanical Engineer | $150k - $190k base salary + equity | https://cascadespace.com/careers/mech-e/

Cascade Space is building ground-based physical infrastructure and software tools to support customer spacecraft exploring the moon and beyond. We're hiring our first Mechanical Engineer to design and integrate RF hardware packaging for our satellite dish arrays. You'll own everything from mechanical and thermal engineering through on-site deployment. Great fit for someone who's as handy with a wrench as they are a keyboard.

Tax Rails | Ruby on Rails Engineer | Full-Time | REMOTE (UTC−8 to UTC+2) | $85k – $125k + Equity + benefits | https://taxrails.com

Tax Rails is building TurboTax for payroll taxes — we simplify the payroll tax processes like e-filing and election filings into clean APIs. We're hiring a senior Rails engineer (4–10 yrs) to own features end-to-end: modeling gnarly tax workflows, document generation, e-file pipelines. Care about correctness — in tax, "mostly right" isn't right. No tax background needed.

Email griffin [at] taxrails [dot] com with a short note, resume, and something you've built.