Senior Full Stack Engineer
Role Summary
Join Junior AI as a Senior Full Stack Engineer in London, shaping AI-driven solutions for investment research. Immediate impact with a fast-paced engineering team.
About the Organisation
Junior is building the AI operating system for investment research. Our software helps private equity firms, consultants and financial institutions complete high-stakes research workflows dramatically faster - from diligence and memo writing to market mapping, research synthesis and strategic analysis.
We’re trusted by several of the world’s top private equity firms, Big Four consultancies and leading financial institutions.
You’d be joining early enough to shape the product, engineering culture and company, but with enough traction that everything you build lands immediately in front of demanding, paying customers.
- Bootstrapped and profitable
- ~ÂŁ20M+ in revenue, after growing 10x last year
- 60+ people across the company
- 20-person engineering team, doubling to 40 this year
- Core stack: TypeScript, Next.js and PostgreSQL
- You have 5+ years of engineering experience - we care about demonstrated competence, not pedigree
- You’re genuinely strong in TypeScript, Next.js and PostgreSQL, not merely familiar with them
- You can build a polished React/Next.js interface or work through a difficult TypeScript problem live and quickly, without relying on Copilot
- You have solid foundations in data structures, system design and PostgreSQL
- You’re high-agency and product-minded
- You’ve owned projects end to end, argued for what should be built - not only how - and shipped without being handed a detailed specification
- You communicate clearly and want a client-facing role
- You’re based in London, or already committed to relocating, and excited to work with the team in person in Farringdon
- You feel like you’re never building fast enough
- Bonus: you’ve built and designed AI-powered products
Working Conditions
If you’re excited to drive innovation at Junior, we’d love to hear from you!
Compensation: £130K – £150K • Offers Equity
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- Private health insurance
- Third Space gym membership
- Dinner provided when working late
- Team lunch provided every day at the office
- Frequent international off-sites, recently including Crete and CancĂşn
- Senior • Base Salary £130K – £150K • Offers Equity
Requirements
Eligibility Criteria
Qualified applicants should have significant experience in engineering with a focus on TypeScript, Next.js, and PostgreSQL. Relocation to London is necessary.
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