Senior FullStack Developer

London, City And County Of the City Of London, United Kingdom
Last week
£600 – £650 pd

Salary

£600 – £650 pd

Seniority
Senior
Posted
23 Apr 2026 (Last week)

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

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