At a Glance
- Tasks: Build innovative AI-driven interfaces and product surfaces using modern tech.
- Company: Join Valyu, a pioneering startup transforming AI search infrastructure.
- Benefits: Competitive salary, equity options, and a vibrant work culture.
- Other info: Dynamic team environment with opportunities for rapid growth and learning.
- Why this job: Shape the future of AI with significant ownership in a groundbreaking project.
- Qualifications: 1-3 years of experience in software development, especially with TypeScript and React.
The predicted salary is between 55000 - 95000 £ per year.
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.
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.
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.
Full Stack Engineer (£55k–£95k + Equity) at Valyu in London employer: Jack & Jill
Valyu is an exceptional employer that fosters a dynamic and innovative work culture in the heart of London, where engineers are empowered to take ownership of their projects and contribute to groundbreaking AI solutions. With competitive salaries, equity options, and a focus on personal growth, employees are encouraged to develop their skills while working alongside top-tier talent in a fast-paced environment that values creativity and collaboration.
StudySmarter Expert Advice🤫
We think this is how you could land Full Stack Engineer (£55k–£95k + Equity) at Valyu in London
✨Join Local Tech Meetups
Get out there and mingle with fellow developers by joining local tech meetups. It’s a fantastic way to meet people who might be working at Jack & Jill or know someone who does. Plus, you can pick up some trendy tech skills and trends while you're at it!
✨Contribute to Open Source Projects
Show off your coding chops by jumping into open-source projects. Not only does this give you practical experience, but it also gets you noticed in the dev community. You'll create a killer portfolio that speaks volumes about your skills to Jack & Jill.
✨Tap into Online Developer Communities
Don’t underestimate the power of online developer communities like GitHub, Stack Overflow, and even Reddit. Participate in discussions, share your projects, and build your visibility. We can often find opportunities through these channels that can lead to a full-time gig at companies like Jack & Jill.
✨Explore Job Boards Specifically for Tech Roles
Keep your eyes peeled on job boards that focus on tech roles. Sites like TechCareers or Stack Overflow Jobs can often have listings for companies like Jack & Jill that might not show up on broader job sites. Make it a habit to check these regularly, and don’t hesitate to apply directly through our website!
We think you need these skills to ace Full Stack Engineer (£55k–£95k + Equity) at Valyu in London
Some tips for your application 🫡
Show off your coding skills:When applying for a software engineering role, it's super important to showcase your coding skills. Make sure your CV includes your tech stack, any relevant programming languages you’re comfortable with, and examples of projects you've worked on. If you have a GitHub profile, link it up! We love to see code in action.
Tailor your portfolio:For a full-time role, we’d expect to see some solid examples of your work in your portfolio. Make sure to include at least two or three projects that highlight your problem-solving skills and your ability to work with different technologies. Focus on the projects that are most relevant to the position at Jack & Jill.
Craft a killer cover letter:Your cover letter is your chance to stand out—make it personal! Explain why you want to work at Jack & Jill and how your skills align with the role. Show us your passion for software development. We dig enthusiastic candidates who understand the value of collaboration and continuous learning!
Be clear and concise:When it comes to writing your CV and cover letter, clarity is key. Avoid jargon that could confuse us and stick to simple, direct language. Highlight your achievements with quantifiable results where possible, and keep everything easy to read. A well-organised application goes a long way!
How to prepare for a job interview at Jack & Jill
✨Brush Up on Your Coding Skills
For a full-time software engineering role, it's crucial that we stay sharp with our coding abilities. Expect technical questions that might involve solving problems on the spot or discussing algorithms. Practise on platforms like LeetCode or HackerRank to get comfortable with the types of questions that often come up.
✨Know Your Tools and Frameworks
Make sure we’re well-acquainted with the tools and technologies listed in the job description. Familiarise ourselves with any specific frameworks or programming languages mentioned. If Jack & Jill uses React or Node.js, for instance, be ready to discuss how we’ve used them in previous projects or coursework.
✨Showcase Your Projects
Bring along a portfolio that highlights our best work. This could be code samples, GitHub repositories, or any side projects we’ve built. Make sure we can talk through our thought process for each project, especially the challenges we faced and how we solved them—this shows our problem-solving skills in action.
✨Prepare for Behavioural Questions
While technical skills are key, full-time positions also require cultural fit. Be ready to discuss our previous experiences and how we handle teamwork, conflict, and deadlines. Brush up on the STAR method—Situation, Task, Action, Result—to clearly articulate our past experiences when discussing how we've contributed to a team.
