Jack & Jill
Full Stack Engineer (£55k–£95k + Equity) at Valyu
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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.
Job Title
Full Stack Engineer
Salary
£55k–£95k + Equity
Company Description
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.
Job Description
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.
Location
London, UK
Why this role is remarkable
- 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.
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What You Will Do
- 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 magical, functional product features.
The ideal candidate
- Has 1-3 years of experience shipping real-world products with a strong mastery of TypeScript, 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.
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.
Get help with your application
Your very own career expert that helps elevate your application to the next level.
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.
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.
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.
“It took my CV and asked me questions relevant to understanding what kind of jobs to suggest for me. Suggestions were almost perfect. Jobs were exactly what I’ve been looking for.”
Jessica, London
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