Full Stack Engineer (£55k–£95k + Equity) at Stealth-mode AI infrastructure startup

Job Title

Full Stack Engineer

Salary

£55k–£95k + Equity

Company Description

Stealth‑mode AI infrastructure startup building the agentic knowledge layer for research

Job Description

You will build the search primitive for the AI era, developing a stack designed for how agents actually work. As a full‑stack owner, you will ship end‑to‑end product surfaces from customer dashboards to agent runtimes. This role combines first‑principles research with hard engineering to make massive knowledge accessible to LLM‑driven workflows.

Location

London, UK

Why this role is remarkable

• Ship at the frontier of information retrieval during a total industry renaissance where LLMs are changing the fundamental way software is built.
• Join a high‑velocity, engineering‑led environment where you have total ownership of product design, ML integration, and deployment cycles.
• Work in an “in‑office” culture that values being “cracked,” moving fast, and building magical user experiences that don’t exist anywhere else.

Responsibilities

• Own the full stack end‑to‑end, utilizing AWS, GCP, Next.js, Supabase, Clerk, and Vercel to ship high‑quality features rapidly.
• Build and integrate AI‑native interfaces and agent runtimes, making LLM-driven workflows a first‑class primitive of the product.
• Collaborate directly with customers in forward‑deployed settings to translate complex research and financial service needs into technical product reality.

Qualifications

• A product‑minded engineer with 1‑3 years of experience shipping real‑world applications using TypeScript and modern React.
• A resourceful generalist who can design APIs, model data, write migrations, and reach into ML as a first‑principles problem solver.
• Fluent with AI engineering tools like Claude Code and Codex to multiply output while maintaining an exceptional bar for UX and design taste.

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