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Full Stack Engineer | Global Trading Firm | London, Hybrid
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Full Stack Engineer | Global Trading Firm | London, Hybrid
Full Stack Engineer | Global Trading Firm | London, Hybrid
Tech Stack: C#/.NET, React – Mathematical/Quant Background
Our client, a global, privately held firm in fast-moving, data-intensive markets, relies heavily on technology to build content-driven systems used by front-office, fiscal, commercial, and operational teams. The high-performance, low-bureaucracy environment values accuracy, speed, clarity, and commercial impact in solving complex problems.
We are seeking a Full Stack Developer with expertise in C#/.NET + React and a strong mathematical/quantitative background to help make and scale platforms supporting modeling, forecasting, optimisation, and decision-making workflows.
About the Role
This role is ideal for someone who:
- Thrives on combining deep problem-solving with modern software engineering
- Works across C#/.NET backend services and React frontends
- Handles complex data, models, business logic, constraints, and numerical accuracy
- Is comfortable in environments where mathematical rigor meets real-world business impact (You don’t need to be a quant developer, but you should enjoy working alongside math-heavy problems.)
📍 Location: London City (hybrid) ⏰ Employment Type: Permanent 💰 Remuneration: Highly competitive base + variable bonus + benefits
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Key Responsibilities
- Develop and refine end-to-end analytics and decision-support applications using C#/.NET and React
- Design high-performance, data-heavy backend services and APIs
- Build clear, intuitive React UIs for presenting complex datasets, workflows, modelling outputs
- Collaborate with traders, analysts, fiscal, finance, commercial, and operations teams to convert requirements into production-ready systems
- Contribute to optimisation-focused tooling (constraints, scenarios, forecasting, decision-support logic)
- Apply strong engineering principles ensuring correctness, performance, and clarity
- Participate in system design, architecture discussions, code reviews, and technical decision-making
Essential Requirements
- Degree in Mathematics, Applied Mathematics, Computer Science, Engineering, Physics, Operations Research, or a related quantitative discipline
- 5+ years of commercial experience with C# and .NET, including ASP.NET Core and Web APIs
- 4+ years of strong React/JS experience (modern frameworks, data-driven interfaces)
- Strong math-analytical problem-solving skills (numerical data, models, constraints, edge cases)
- Exposure to linear programming, mathematical optimisation, OR, modelling, forecasting, or decision-support systems
- Deep understanding of data structures, algorithms, and computational problem-solving
- Experience with relational databases (SQL Server, PostgreSQL, or Oracle)
- Ability to bridge technical/non-technical stakeholders (business, finance, trading, analysts, operations)
- Pragmatic engineer mindset with effective communication skills
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Nice-to-Have Experience
- Background in trading, commodities, financial services, analytics platforms, or commercial optimisation
- Hands-on with optimisation libraries, solvers, or modelling tools
- Experience with event-driven systems, async workflows, or concurrent systems
- Tools built for fiscal/finance, trading, or commercial teams
- Interest in linear programming, constraint optimisation, scenario analysis, or decision-support
How to Apply
📧 Interested? Apply directly via [advert link] and submit your updated CV/Resume to: chantelle.smith@sourcegroupinternational.com
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