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Software Engineer
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Do you have a track record of building exceptional software and want to work on a genuinely ambitious AI product?
Are you excited by high ownership, cutting-edge AI tooling, deep technical challenges, and the opportunity to become a technical leader within a small, elite engineering team?
🚀 Software Engineer – AI x Financial Modelling 🚀
💰 Salary: Up to £250k DOE + equity
📍 Location: London - onsite 5 days per week
🌍 Will relocate and sponsor
🧠 Experience: Exceptional engineers – high agency and strong technical fundamentals
I’m excited to be working with a very ambitious AI startup reinventing how businesses make some of their biggest decisions. They’re starting by building the best AI add-in for complex financial modelling in Excel – essentially Cursor for financial modelling.
Financial models sit underneath huge decisions across M&A, private equity, investment, corporate strategy and consulting, yet the tooling behind them remains incredibly manual and outdated. They’re building something fundamentally different.
Long-term, their ambition is to create an AI operating system for the entire strategic decision lifecycle – spanning Excel, PowerPoint, email and meetings. They’re tackling a potentially enormous new category at the intersection of AI, software engineering and financial decision-making.
They’re now looking for exceptional Software Engineers to join a small, extremely high-calibre engineering team and help build the product from the ground up.
💡 You’ll work directly on:
- Owning features end-to-end – from Rust services and backend infrastructure through to the frontend
- Using the latest AI tools and models to ship high-quality software at exceptional speed
- Building and improving AI agents, including their harness, tools and context optimisation
- Writing highly performant software – removing allocations, optimising queries and caching aggressively
- Owning and improving backend infrastructure and CI pipelines
- Debugging low-level issues and continuously optimising system performance
- Working closely with design to ensure every feature feels polished, beautiful and consistent
- Taking increasing technical ownership as the company and product scale
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✅ They’re particularly interested in engineers who have:
- Evidence of being a top-centile engineer
- Exceptional problem-solving ability and strong software engineering fundamentals
- High agency, determination and a genuine desire to take ownership
- The ability to move quickly, learn new technologies and wear multiple hats
- A strong interest in AI and experience using modern AI coding tools effectively
- The ability to work across the stack rather than being restricted to one area
- A genuine passion for building great products, not simply writing code
💻 Tech stack:
- Rust (but they are open to any low-level language e.g. C++)
- TypeScript
- React
- AI / LLM tooling
- Backend infrastructure & DevOps
🎯 Bonus points for:
- Competitive programming experience e.g. Olympiads or Programming Contests
- Trading or financial technology background
- AI Tech experience
- Experience building AI agents
🔎 What they’re looking for:
- High agency – you see a problem and take ownership of solving it
- Technical excellence – you care about performance, architecture and writing exceptional software
- AI-native mindset – you understand that AI is now an essential part of the engineering workflow
- Speed + quality – you can leverage AI to move incredibly quickly without becoming a “vibe coder”
- Curiosity – you enjoy getting into unfamiliar areas and figuring things out
- Product mindset – you care about how the software feels, not just whether it works
- Leadership potential – over time, you’ll have the opportunity to own significant parts of the product
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🚀 Why join?
- Join a small, exceptionally strong engineering team with backgrounds including Cambridge and UCL, Jane Street and Bloomberg
- Work on a genuinely ambitious AI product tackling a huge, under-served problem
- Own features across the entire stack rather than being confined to one area
- Work at the cutting edge of AI-native software development
- Have significant influence over the technical direction and product
- Opportunity to become a technical leader and own major parts of the product as the company scales
- Build something from the ground up in a highly ambitious environment
- Work closely with an exceptional designer and engineering team to create a product that is both technically excellent and beautiful
If you’re an exceptional engineer who wants to work at the intersection of AI, financial modelling and high-performance software, with the opportunity to have genuine ownership and impact from day one, this is a seriously exciting opportunity.
Interested? Apply now 🚀
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