Senior Software Engineer (C# / SQL Server)

Company: JSS
Apply for the Senior Software Engineer (C# / SQL Server)
Location: London
Job Description:

Senior Software Engineer – Perm£85,000 base + Benefits package3 days in London based office required

We are working with a well established exciting client that are interested in candidates who have solid experience in working on full-stack (frontend and backend), and who cover the following skills and experience.

Strong experience designing and building scalable full-stack web applications using TypeScript/React and C#/.NET (or equivalent technologies). Deep understanding of core software engineering principles, including design patterns, modular architecture, and maintainable, testable code. Proven ability to design, build, and evolve RESTful APIs and microservices, with a focus on performance, scalability, and reliability. Experience leading the architecture of end-to-end systems, spanning frontend, backend, and data layers, with clear separation of concerns. Strong experience working with distributed systems, managing complex data flows, integrations, and service-to-service communication. Hands-on experience with cloud platforms (Azure preferred; AWS or GCP acceptable), including compute, serverless, messaging, storage, and identity/access management. Familiarity with containerisation (Docker, Kubernetes) and modern deployment patterns, including microservices and serverless architectures. Experience implementing CI/CD pipelines, automated testing (unit and integration), and Infrastructure as Code (e.g., Terraform or equivalent). Strong understanding of database design and data access patterns, across both relational and NoSQL technologies. Proven experience working in Agile environments, contributing to engineering best practices, code reviews, and mentoring engineers. Experience leveraging AI-assisted development tools to enhance delivery while maintaining high standards of quality and engineering discipline. A degree in Computer Science, Software Engineering, or equivalent practical experience

If you have these skills & experience then please pass your cv to me today, shane.hickmott@thejssgroup.com…

Posted: June 2nd, 2026