As the first Principal Engineer, you will own the architectural evolution of a platform automating complex legal workflows for global VC funds. You'll orchestrate multi-model LLM pipelines, build document-processing engines for sensitive investment data, and drive technical standards. This is a hands-on founding role designed for engineers who thrive on shipping production-ready AI solutions.
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London, United Kingdom$50k – $80k + Equity
Principal Engineer at High-velocity Legal AI startup
Are you ready to redefine how venture capital operates? This high-velocity Legal AI startup is seeking a Principal Engineer to architect a platform that cuts legal busywork by 10x for the world's top investment funds. You'll lead the charge in orchestrating multi-model LLM pipelines and building secure document-processing engines that influence real deal outcomes. With 0.5-1.0% equity and a culture that prioritizes shipping over talking, this is a rare opportunity to join a well-funded founding team and own core systems from day one. If you have 8+ years of full-stack experience and a bias for action, help us build the category-defining platform for VC legal teams.
Overview
Role overview
Company
Perry
High-velocity Legal AI startup for venture capital funds
Responsibilities
What you will do
- AI Orchestration: Design and deploy production-grade LLM workflows for document analysis, risk flagging, and automated redlining of legal files.
- End-to-End Ownership: Ship full-stack features using TypeScript, Node.js, and React, moving from architectural design to production code within a single day.
- Secure Scaling: Build robust document plumbing and email ingestion pipelines capable of handling highly sensitive data with enterprise-grade security and observability.
Candidate profile
Who this is a fit for
- Technical Mastery: At least 8 years of software engineering experience with deep expertise in TypeScript, Node.js, Express, and MongoDB.
- Production AI Experience: Proven track record of integrating LLMs into real-world products, managing context, costs, and model performance tradeoffs.
- Principal Maturity: Experience setting technical standards and making high-level architectural calls while remaining 100% hands-on and obsessed with shipping quality code.
What makes it remarkable
Why this role is remarkable
- Direct Market Impact: Build software used by leading global funds to process thousands of real investment documents and influence high-stakes deal outcomes.
- Founding Influence: Join as a true founding team member with significant equity (0.5% – 1.0%) and zero bureaucracy in a high-trust, shipping-focused culture.
- Cutting-Edge Stack: Architect sophisticated Agentic AI pipelines using OpenAI, Anthropic, and Gemini to automate the manual work that currently slows down venture capital.
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.
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