As a Founding Engineer, you will build deterministic AI infrastructure for the legal sector. Moving beyond prompt engineering, you will develop a provably correct system that compiles statutes and case law into fast, auditable engines. You will own core components of the technical architecture, shipping high-impact code that eliminates hallucinations by design.
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Founding Engineer at well-funded legal tech AI startup
Are you tired of AI hallucinations and 'vibes-based' engineering? Join a high-growth startup as a Founding Engineer and build the foundational infrastructure for deterministic legal AI. This isn't another LLM wrapper; you'll be developing a provably correct system that compiles statutes into auditable engines with sub-12ms latency. If you're a scrappy builder who wants to own a technical roadmap and solve one of the hardest problems in the legal industry alongside an elite team of ex-Palantir and VC-backed founders, this is the role for you. Based in London with visa sponsorship available.
Overview
Role overview
Company
About the company
Well-funded legal tech AI startup
Responsibilities
What you will do
- Design and implement the core compilation pipeline that ingests legal sources and converts them into deterministic logic.
- Build and maintain high-performance infrastructure using Python, FastAPI, and AWS to deliver verdicts in under 12ms.
- Work directly with the founders to translate complex legal requirements into provable, scalable technical specifications.
Candidate profile
Who this is a fit for
- A scrappy builder with 2+ years of software experience and a portfolio of personal projects or previous startup contributions.
- Deeply curious about mechanistic interpretability, symbolic reasoning, and creating systems where accuracy is provable.
- Comfortable with ambiguity and the fast-paced intensity of an early-stage company, thriving in an autonomous environment.
What makes it remarkable
Why this role is remarkable
- Opportunity to build a new software paradigm from the ground up where correctness is the product, not just a side effect.
- Backed by Y Combinator and top-tier VCs with overwhelming customer demand and a clear path to scale.
- Massive ownership and agency to define your own roadmap and influence the technical direction of a high-growth startup.
Jack & Jill
How Jack & Jill work together
I get to know what you’re great at, then find roles you’d never find yourself.Ok, I'll go first. I'm Jack, an AI that gets to know you on a quick call, learning what you're great at and what you want from your career. Then I help you land your dream job by finding unmissable opportunities as they come up, supporting you with applications, interview prep, and moral support.
I recruit from Jack’s network and make the intro when I spot a great match.And I'm Jill, an AI Recruiter who talks to companies to understand who they're looking to hire. Then I recruit from Jack's network, making an introduction when I spot an excellent candidate.
Meet Jack
Jack gets to know what you're great at and what you want next, then searches 14 million jobs daily and introduces you directly to hiring managers.
How does this work?
Jack's an AI agent for job searching and career coaching. He works for you.
Jill is the AI recruiter working for the company. She recruits from Jack's network.
If it's a match and the company wants to meet you, they'll make the intro. In the meantime, if you'd like, Jack will send you excellent alternatives.