C# Developer – React

Overview

In this role you will design and build high-performance front-office applications for Global Markets, partnering with sales and trading teams to deliver value-driven solutions. You will contribute across the full SDLC, developing scalable RESTful APIs and modern UIs with React. The role sits in a distributed agile setup, focusing on real-time systems and production support to ensure stable, impactful trading tools. You will shape front-office platforms and collaborate with cross-functional teams to drive execution and continuous improvement.

Responsibilities

• Design, develop and maintain front-office applications, components and utilities
• Contribute across the full software development lifecycle (analysis, design, development, testing, deployment, and support)
• Build and deliver high-performance, scalable applications
• Develop RESTful APIs and modern UI applications using React
• Engage directly with business stakeholders to understand requirements and deliver value-driven solutions
• Collaborate with production support teams to ensure smooth releases and system stability
• Provide third-line support and assist with troubleshooting production incidents
• Contribute to code reviews and continuous improvement initiatives

Key requirements

• Strong development experience in C# & REACT
• Experience building web-based applications and RESTful APIs
• Solid experience with relational databases and SQL
• Experience with modern JavaScript frameworks, particularly React
• Strong understanding of application performance and optimisation
• Excellent communication skills, both written and verbal
• Experience working in agile, collaborative environments
• Experience within investment banking or capital markets environments
• Knowledge of front office systems (FX, Rates, Credit, or derivatives)
• Experience with multi-threaded or distributed systems
• Familiarity with CI/CD tools (e.g. Jenkins, TeamCity) and deployment tools (e.g. Ansible)
• Strong analytical and problem-solving skills

• excellent communication
• collaboration
• analytical thinking
• C#
• React
• RESTful APIs

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