Principal Software Engineer – C#/.NET, AWS | FinTech AI

Client Server Limited is seeking a Principal Software Engineer in London/Hybrid to architect and deliver scalable C#/.NET services on AWS, with optional Python work. You will influence product direction, champion best practices, and guide cross-functional teams in fast-paced sprints.

The role offers hybrid work with two days in the London office and two days remote. The ideal candidate has deep C#/.NET experience, AWS knowledge, and a track record delivering scalable fintech-style systems, with

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