Senior Software Engineer – Build Scalable, Trusted Systems

CSL is seeking a Senior Software Engineer in Watford to own complex backlog tickets, deliver high-quality code, and uphold engineering standards. You will collaborate across the Signalling Engineering team, guiding design, testing and operations of software and tools.

You will mentor peers, participate in peer reviews, support roadmaps and ensure robust documentation and testing. The role emphasizes building scalable, maintainable solutions with measurable outcomes.

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