Founding Software Engineer - AI (Python/Typescript)

Founding Software Engineer – AI (Python / Typescript)

£130,000 – £160,000 + meaningful equity

On-site in London (£10K relocation provided)

Join a deeply technical AI-native startup founded by PhDs and researchers from Cambridge, Imperial, and other top European and US institutions. This is an opportunity to work directly with a team who’ve published at leading AI conferences, built open-source tools used across the industry, and scaled high-performance systems from first principles.

Now, they’re hiring a Founding Software Engineer to help build the next generation of reasoning tools powered by large language models.

The product is already live with paying customers, and the company is well-funded with serious growth ambitions.

What you'll work on:

• Architecting and scaling LLM-powered applications
• Building efficient inference pipelines and backend infrastructure
• Working across the stack to ship production-grade code fast
• Collaborating directly with the founders and early technical hires

What they’re looking for:

• A degree from a world-leading university (e.g. Cambridge, Oxford, EPFL, ETH Zurich, ENS, TUM, etc.)
• Experience in AI-focused products, ideally within a high-growth or research-heavy environment
• Strong Python engineering skills; full-stack capability a bonus (Postgres, Typescript, React)
• A bias toward action, autonomy, and technical depth

This isn’t a typical startup job. It’s a chance to work alongside an elite team of engineers and scientists on hard technical problems — with equity and early ownership in a company building something truly original in the AI space.

If you’re ready to build fast, learn constantly, and work on meaningful AI challenges, we’d love to hear from you.