Salary: £45,000 - 70,000 per year Requirements: Extensive professional software development experience. Strong proficiency in React.js, JavaScript/TypeScript, Redux/RTK, hooks, and modern UI patterns and architecture. Key experience with micro front-end architectures and creating a reusable component library. Experience with telemetry and observability of front-end applications. Expertise in C# .NET Core, REST APIs, and microservices-based development. Experience in transforming monolithic applications into composable microservices or modular monoliths. Some hands-on experience with Python (pyspark) for distributed data processing and data pipelines. Some experience developing dashboards and data models in Power BI, including DAX calculations and performance tuning. Strong understanding of microservices, API design, event-driven architectures, and distributed systems. Familiarity with Azure DevOps, Gitlab, GitHub Actions, or similar for CI/CD processes. Strong understanding of automated builds, testing, deployment, and monitoring. Responsibilities: Design, develop, and maintain full stack applications using React JS and C#.NET Core. Build high-performance backend services, RESTful APIs, and microservices with a focus on scalability and resilience. Develop responsive, modular, and accessible UI components using React JS and modern JS/TS patterns. Collaborate closely with business stakeholders and domain experts in risk, Regulatory Reporting, and Finance. Understand Power BI dashboards, data models, and analytical reports for business users. Work with DevSecOps to optimize CI/CD pipelines with automated testing and monitoring. Architect and contribute to event-driven and distributed system designs using technologies such as Kafka or Event Hub. Drive engineering best practices through code reviews, unit/integration testing, performance tuning, and documentation. Contribute to cloud migration and modernization initiatives, especially in Azure or AWS environments. Mentor junior developers and collaborate within a cross-functional agile team. Technologies: API AWS Architect Azure Backend C# CI/CD Cloud DAX DevSecOps DevOps GitHub GitLab JavaScript Kafka Power BI Python PySpark REST React Redux TypeScript microservices UX UI Design ASP.NET Security Web Fullstack More: Our banking client is looking for a Senior Full Stack Developer specializing in React and .NET Core for an initial 6-month engagement based in London. This role operates on a hybrid basis, requiring onsite presence three days a week. We offer a dynamic work environment with opportunities to work on scalable applications and cloud-native architectures within the financial sector, focusing on engineering excellence and best practices. last updated 18 week of 2026