Full Stack Engineer Equity at Valyu

Job Title

Full Stack Engineer

£55k–£95k + Equity

Valyu is building the foundational search infrastructure for the next decade of AI agents, creating a specialized knowledge layer designed for deep research and reasoning. Based in London, Valyu combines first-principles research with high‑scale engineering to transform how LLMs access and process complex information across thousands of sources.

Valyu is seeking a Junior to Mid‑level Full Stack Engineer to build the agentic knowledge layer for AI. You will own product surfaces end‑to‑end, from customer dashboards to internal tools, using a modern stack including Next.js and Supabase. You'll integrate LLM‑driven workflows and create AI‑native interfaces that define how agents interact with structured knowledge.

London, UK

• Build the core primitive for the agentic era, creating the specialized search infrastructure that high‑performance AI systems require to function.
• Join a high‑velocity team where "cracked" engineers are the standard, working at the intersection of first‑principles ML research and hard software engineering.
• Gain significant ownership and equity in a London‑based startup tackling one of the most foundational questions in the future of software development.

• Ship end‑to‑end product surfaces using Next.js, Supabase, and Vercel, maintaining a high bar for design quality and user experience.
• Build and iterate on AI‑native interfaces and infrastructure for tool calls, agent runtimes, and deep research workflows.
• Work directly with customers in forward‑deployed settings to translate complex technical needs into functional product features.

• Has 1‑3 years of experience shipping real‑world products with a strong mastery of Type Script, React, and full‑stack data modeling.
• Demonstrates exceptional product instinct and design taste, caring deeply about the feel and UX of the tools they build.
• Is relentlessly resourceful and proficient with AI engineering tools like Claude Code to multiply output and master new skills rapidly.