Software Engineer

In this role you will help build a cutting-edge AI-backed product for financial modelling, starting with an Excel add-in and expanding toward a comprehensive AI operating system. You will own features end-to-end across the stack, from Rust services to frontend, collaborating with a small, elite team. Expect high performance workloads, tight feedback loops with design, and significant technical ownership as the product scales. This is a rare opportunity to shape a new category at the intersection of AI and strategic decision-making.

• salary up to 250k DOE + equity
• onsite London office 5 days a week
• relocation sponsorship
• opportunity to become a technical leader
• small elite engineering team
• build from ground up in ambitious environment

• Own features end-to-end across the stack (Rust services, backend, frontend)
• Leverage modern AI tools and models to ship high-quality software quickly
• Develop and improve AI agents, includes harness, tools and context optimization
• Write performant code, optimise queries, and reduce allocations
• Maintain and enhance backend infrastructure and CI pipelines
• Debug low-level issues and optimize system performance
• Collaborate with design to ensure polished, consistent user experiences
• Take increasing technical ownership as the product scales

• Top-centile engineering capability
• Exceptional problem-solving and strong software fundamentals
• High agency, determination, and ownership
• Ability to move quickly, learn new technologies and wear multiple hats
• Strong interest in AI and experience with modern AI coding tools
• Ability to work across the stack
• Genuine passion for building great products, not just writing code

• High agency
• Curiosity
• Product-mindedness
• Rust (preferred) or other low-level language (e.g., C++)
• TypeScript
• React