Senior FullStack Developer Full Time

City, London
Adecco

My Banking client is seeking to recruit a Senior Full Stack Developer (React & .NET Core) on an initial 6 month based in London. It is hybrid and will require 3x days onsite per week.

About the Role

We are seeking a highly experienced Senior Full Stack Developer with deep expertise in React JS on the front-end and C# .NET Core on the backend. The ideal candidate will have substantial hands-on experience developing scalable applications, strong exposure to cloud-native architectures, with experience in the financial sector. Experience with CI/CD, microservices, and event-driven architectures is essential, and knowledge of Python (pyspark) for data-driven workflows is advantageous

Key Responsibilities

• Design, develop, and maintain full stack applications using React JS, C#.NET Core, and supporting technologies.
• Build high-performance backend services, RESTful APIs, and microservices with focus on scalability, maintainability, and resilience.
• Develop responsive, modular, and accessible UI components using React JS and modern JS/TS patterns.
• Collaborate closely with business stakeholders and risk, Regulatory Reporting and Finance domain experts to deliver solutions in these domains.
• Have a strong understanding of Power BI dashboards, data models, and analytical reports for business users.
• Work with DevSecOps to implement and optimize CI/CD pipelines, ensuring robust automated testing, deployment, and monitoring.
• Architect and contribute to event-driven and distributed system designs using technologies such as Kafka, Event Hub, or similar.
• Drive engineering best practices: code reviews, unit/integration testing, performance tuning, documentation, security scanning
• Contribute to cloud migration and modernization initiatives, especially in Azure or AWS environments.
• Mentor junior developers and collaborate within a cross-functional agile team.

Required Skills & Experience:

Technical Skills

• Extensive professional software development experience.

• Front-end:
  • Strong proficiency in React.js, JavaScript/TypeScript, Redux/RTK, hooks, and modern UI patterns and architecture.
  • Micro front-end experience is key having delivered micro front-end architectures, and creating a reusable component library
  • Experience with Telemetry and observability of front-end applications
• Back-end:
  • Expertise in C# .NET Core, C#, REST APIs, Web APIs, and microservices-based development.
  • Experience in transforming monolithic applications into composable microservices, or modular monoliths is a plus.
• Python (pyspark):
  • Some hands-on experience with distributed data processing, data pipelines, and analytic transformations.
• Power BI:
  • Some experience developing dashboards, data models, DAX calculations, and enterprise-grade BI solutions.
  • Strong understanding of data modeling, performance tuning, and governance in Power BI.
• Architecture:
  • Strong knowledge of microservices, API design, event-driven architectures, and distributed systems.
• DevOps / CI/CD:
  • Experience with Azure DevOps, Gitlab, GitHub Actions, or similar.
  • Strong understanding of automated builds, testing, deployment, and monitoring.