Full Stack Engineer

Junior AI · Londonmid

In short

▸Ingeniero full stack que construye productos de IA para investigación financiera con entregas semanales.
▸Trabajas end-to-end en frontend, backend y datos, usando TypeScript, Next.js y PostgreSQL, con impacto inmediato en clientes pagadores.
▸Destaca el ritmo acelerado: proyectar nuevos productos de IA en semanas, con interfaces innovadoras y contacto directo con clientes.

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What they ask for

✓3+ años de experiencia en ingeniería, demostrada en proyectos reales.
✓Fortaleza comprobada en TypeScript, Next.js y PostgreSQL.
✓Capacidad para construir interfaces React/Next.js y resolver problemas de TypeScript en tiempo real sin Copilot.
✓Habilidades sólidas en estructuras de datos, diseño de sistemas y bases de datos PostgreSQL.
✓Actitud proactiva, orientada al producto y capacidad para definir qué construir, no solo cómo.
✓Ubicación en Londres o compromiso de reubicarse, con disponibilidad para trabajar presencialmente en Farringdon.

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TypeScriptNext.jsPostgreSQLReactNode.jsREST APIsGraphQLTailwind CSSPostmanGit

Who should you write to at Junior AI?

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👶 About Junior 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. js and PostgreSQL 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. 💡 The role You’ll own features end to end - across the frontend, backend and data layer - and ship on a weekly cadence, not a quarterly one. 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 🧭 Interview process The process moves in days, not months: Introductory call : background, motivation and mutual fit Live technical screen (30-mins ): solving a TypeScript problem live in an IDE with one of our engineers. Benefits 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 Cancún If you’re excited to drive innovation at Junior, we’d love to hear from you! Compensation: £90K – £110K • Offers Equity Junior/Mid • Estimated Base Salary £90K – £110K • Offers Equity Find Jobs in United Kingdom on Arbeitnow

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