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.