Software Engineer (up to £300k)

The Role

This company is reinventing how businesses make their biggest decisions. They're starting by building the best AI add-in for complex financial modelling in Excel. Financial models underpin every critical business decision, yet the tooling for this form of programming is fundamentally broken. This is a chance to fix it. The long-term vision is an AI operating system for the entire strategic decision lifecycle, a new category with a massive market opportunity. The engineering team is small, but comprises top-tier talent from leading institutions.

You will join a small, high-calibre engineering team. This isn't a role for 'vibe coders'; you'll own features end-to-end, from Rust services to backend and frontend, with a mandate to ship high-quality code at speed using the latest AI tools. Expect deep technical problems, not just feature implementation. This role is 5 days a week in person in Hoxton, London.

What You'll Do

• Ship high-quality code at speed, leveraging the latest AI tools and models. This isn't optional.
• Own features end-to-end: from Rust services to backend logic and frontend implementation.
• Optimize for performance: eliminate allocations, tune queries, implement aggressive caching.
• Enhance our AI agent's intelligence by refining its harness, tools, and context optimization.
• Drive improvements across backend and infrastructure, from low-level bug fixes to CI optimization.

Who You Are

• Demonstrable track record as a top-tier engineer.
• Expertise in leveraging AI for coding, including advanced prompting and familiarity with various models (e.g., Claude Code, Cursor).
• Experience owning features end-to-end across the stack (Rust, TypeScript, React, backend, frontend).
• A deep understanding of performance optimization and infrastructure.
• Ability to work 5 days a week in our Hoxton, London office.

Why Apply Through Dex

This isn't a typical job board role. Top engineering seats like this are rarely advertised publicly and are often oversubscribed. Apply through Dex to get a direct introduction, skip the cold application process, and receive a full brief before you even interview.