Senior Full-Stack Engineer

About HFBAC

We help startups build engineering teams with great chemistry - not just impressive CVs. We test for team fit before credentials which is why our placements have 90% retention at 12 months versus the industry average of 67%.

Were partnering with a fast-growing AI compliance platform to find their next Senior Full-Stack Engineer.

The Opportunity

This Y Combinator-backed company just closed a $32M Series A at a $300M valuation. Theyve grown from 100 to 500 customers in six months including AI unicorns youve heard of. The founding team are AI researchers from MIT Stanford and Berkeley who dropped out to build this.

You wont be a cog in a machine. Youll lead system design ship high-impact features and help mentor a growing engineering team. The founders started by solving their own compliance pain - they know the problem deeply and move fast.

What Youll Do

• Lead system design and architecture for core features and infrastructure

• Ship full-stack product features across React TypeScript and Postgres

• Mentor junior and mid-level engineers - foster a culture of technical excellence

• Translate high-level product goals into scalable backend and frontend implementations

• Own major product areas and be accountable for reliability performance and extensibility

• Touch every part of the stack: React Postgres Tailwind CSS

What Were Looking For

Must-Have

• 5-7 years building production-grade products

• Strong technical breadth across React TypeScript TailwindCSS Postgres

• Deep experience with system design and architecture in fast-moving environments

• Track record of end-to-end ownership - youve led complex features or systems

• Passion for mentoring and sharing knowledge

• Excellent product sense - you know what good UX looks like

Who Thrives Here

This is a high-intensity environment with founders who move fast and expect the same from their team. If you need a lot of structure and hand-holding this isnt for you. But if you thrive in ambiguity unblock yourself and others and bring strong judgment to the table - youll love it.

The team values high agency low ego and people who lift others up. Weekend availability is expected during crunch periods but theres flexibility for exceptional candidates who demonstrate value.

How HFBAC Works

We dont just match keywords on a resume.

We run a Chemistry Assessment to understand how you work what motivates you and whether youll genuinely thrive in this environment.

Its a two-way street - well tell you honestly if we dont think its the right fit.

Interested

Reply to this post or send me a message. No resume required for an initial chat - just tell me what youre looking for and well take it from there.