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2 senior c engineer jobs found in London

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Outside Spy
Jul 02, 2026
Duration not stated
Senior C# Engineer – .NET 8/9, AWS Lambda, SQS, SNS – Outside IR35 at Smart Sourcer Limited, City of London, £Contract Rate
Outside Spy City of London, London, UK
Senior C# Engineer – .NET 8/9, AWS Lambda, SQS, SNS – OUTSIDE IR35 £700–£800/day • 100% Remote • 11-month rolling contract Takeaway: Lead the architecture and build of a greenfield SaaS platform as a deeply senior, hands-on C# engineer, with heavy emphasis on deep .NET engineering , high-performance distributed systems , and real-world AWS serverless delivery . You’ll also have the opportunity to develop hands-on skills with Claude Code , one of the most advanced AI-assisted development tools in the industry. Role Overview: You’ll operate as the technical spearhead for a greenfield product build, reporting to the Director of Engineering. Expect deep backend engineering, distributed system design, and high-quality serverless delivery, plus the chance to adopt modern AI-assisted development practices as part of your workflow. What You’ll Bring: Senior/Staff-level backend mastery in C# and .NET 8/9 , with the ability to architect and lead...
Outside Spy
Jun 30, 2026
Duration not stated
Senior C# Engineer - AI Native & Agentic Engineering, AWS, Lambda, SQS at Smart Sourcer Limited, City of London, £Contract Rate
Outside Spy City of London, London, UK
Senior C# Engineer (AI-Native & Agentic Engineering) .NET 8/9 • AWS Lambda/SQS • OUTSIDE IR35  £700–£800/day • 100% Remote (UK) • 11-months rolling If you’re a deeply senior C# engineer who wants to actually build something new, not maintain legacy, not refactor someone else’s mess, this is one of the few roles in the market worth stopping for. You’ll be the technical spearhead for a greenfield SaaS platform, reporting directly to the Director of Engineering and shaping everything from architecture to AI-native delivery patterns. This is high-autonomy, high-impact work for someone who thrives in ambiguity and loves solving hard problems at pace. Why this role stands out: You set the engineering bar, not follow it. You get to embed agentic AI workflows into real production systems. You own outcomes end-to-end, not just “tickets”. You influence product direction without layers of process or ceremony. What You’ll Bring:...
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