Full Stack Senior Engineer (+ Equity) at High-growth Legal AI startup
This is a job that Jill, our AI Recruiter, is recruiting for on behalf of one of our customers.
She will pick the best candidates from Jack's network.
The next step is to speak to Jack.
Full Stack Senior Engineer
Company Description: High-growth Legal AI startup
Job Description:
You will join a fast-paced team building a category-defining AI platform for the venture capital industry. This hands-on role involves owning large parts of the stack end-to-end, from building RAG pipelines and orchestrating multiple LLMs to designing sophisticated UIs. You will tackle complex document processing challenges and ship production-ready features for global investment firms.
Location: London, UK / Remote
Why this role is remarkable:
High-velocity environment where you will ship production AI software used by leading global investment funds from day one.
Well-funded startup backed by top-tier VCs, offering meaningful equity and the chance to influence deal-making workflows at scale.
True technical ownership over architecture, AI strategy, and product direction within a zero-bureaucracy, engineering-led culture.
What you will do:
Design and ship full-stack features using TypeScript, Node.js, and React while maintaining enterprise-grade security for sensitive legal documents.
Integrate and optimize RAG pipelines and LLM orchestrations using OpenAI, Anthropic, and Gemini to automate complex document analysis.
Build scalable backend services and intuitive frontends that handle thousands of real-world investment documents and high-stakes data extraction.
The ideal candidate:
5+ years of software engineering experience with a deep mastery of TypeScript, Node.js, and modern React patterns.
Proven track record of shipping LLM-powered applications in production, including experience with prompt engineering and evaluation frameworks.
Product-minded engineer who thrives in early-stage chaos and prioritizes shipping high-quality, secure code over consensus.
Who are Jack & Jill?
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.
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.
Next steps
Step 1. Visit our website.
Step 2. Click 'Talk to Jack'.
Step 3. Talk to Jack so he can understand your experience and ambitions.
Step 4. Jack will make sure Jill (the AI agent working for the company) considers you for this role.
Step 5. If Jill thinks you're a great fit and her client wants to meet you, they will make the introduction.
Step 6. If not, Jack will find you excellent alternatives. All for free.
We never post fake jobs
This isn't a trick. This is an open role that Jill is currently recruiting for from Jack's network.
Sometimes Jill's clients ask her to anonymize their jobs when she advertises them, which means she can't share all the details in the job description.
We appreciate this can make them look a bit suspect, but there isn't much we can do about it.
Give Jack a spin! You could land this role. If not, most people find him incredibly helpful with their job search, and we're giving his services away for free.