Quant Developer | C# & React | Financial Services | London, Hybrid

Quant Developer | C# & React | Financial Services | London, Hybrid

One of our global clients is looking for a Developer with strong C# engineering skills, solid React experience, and a genuinely mathematical mindset, to join a high-performing financial services technology team in London.

This is a hands-on role building analytics, pricing, risk, and decision-support tools used directly by front-office and business-facing teams. You’ll be working across robust C#/.NET backend services, modern React frontends, and data-heavy applications where accuracy, performance, and usability really matter.

The ideal profile is someone who enjoys the crossover between quantitative problem-solving and modern software engineering; not just building screens, and not just writing models in isolation, but creating end-to-end tools that make complex financial data clear, usable, and actionable.

📍 London, Hybrid 🪙 Competitive base + bonus + benefits 📆 Permanent role

What you’ll do Build and enhance front-office analytics and decision-support platforms using C#/.NET and React. Develop backend services and APIs supporting pricing, risk, analytics, modelling, and complex business logic. Build intuitive React-based UIs that allow users to interact with complex datasets, calculations, and workflows. Work closely with front-office, quant, risk, and engineering teams to turn complex requirements into reliable software. Contribute to tools involving pricing, scenario analysis, risk views, reporting, and data visualisation. Design scalable, maintainable systems that can handle data-intensive and computation-heavy use cases. Improve performance, accuracy, and usability across existing analytics platforms. Work with legacy systems where needed, while helping modernise and improve the overall engineering landscape. Apply strong mathematical and analytical thinking to solve complex real-world financial problems.

Requirements: Degree in a numerical or technical discipline such as Mathematics, Physics, Engineering, Computer Science, Quantitative Finance, or similar. A minimum of 5 years of strong hands-on experience with C#/.NET in a financial services, trading, investment, or analytics-driven environment. Good commercial experience with React and modern frontend development. Strong experience working with SQL databases and data-heavy applications. A strong mathematical, quantitative, or analytical background. Exposure to linear programming, optimisation techniques, or mathematical modelling would be highly relevant. Experience building tools around risk, analytics, modelling, reporting, or complex data workflows. Comfortable working across the full stack, with the ability to move between backend logic and frontend delivery. Strong understanding of software engineering best practice, clean code, testing, performance, and maintainability. Experience working with complex datasets, business logic, calculations, or financial models. Strong communication skills and the ability to work closely with technical and non-technical stakeholders.

📧If you're interested in this role, please apply directly to this advert with your updated CV.