Summary
✨ AI‑Generated
A global organization is hiring a Senior C# Developer to take hands-on ownership within a core cloud-based platform team. You will shape technical direction, make architectural decisions, manage technical debt, develop secure .NET services and integrations, and own substantial areas of the platform from initial design through release and ongoing support.
Highlights
Strong technical ownership of major platform components, influence over architecture and technical priorities, substantial responsibility from design through production, and a generous benefits package including pension, bonus and extensive annual leave.
Description
Senior C# Developer / Senior Software Engineer
£70,000 to £75,000
Working pattern: Hybrid.
x3 days in Office
Location: London
Benefits: Pension up to 17%, Bonus, 34 days holiday + a heap of flexible benefits.
A global business is hiring a Senior C# Developer to take hands-on technical ownership inside one of its core platform teams.
The platform is cloud-based, .NET throughout, and carries real weight: secure services for end users, internal case management, client reporting, and live integrations out to third-party financial systems.
It is growing, and they want someone senior enough to shape how it grows rather than just add to it.
What you would be running:
Significant slices of the platform, yours from the first design conversation through to the release note and whatever comes back afterwards.The judgement call on technical debt in a mature C# codebase: what is genuinely holding the platform back, what is cosmetic, and what the team should spend its next quarter on.Larger refactoring and re-architecture work when the answer is that the current shape will not carry where the product is going.The data layer as the platform scales, including the integrations that reach outside it.Whether problems surface on your terms or the user's, through the monitoring, logging and alerting you put around what you build.How releases go out and what happens when one does not behave.The engineering standard around you, set through code review, mentoring and the example your own work sets.AI-assisted tooling used with your name still on the output, which they have been deliberate about wanting rather than quietly tolerating.
What they need from you:
Deep commercial C# on a .NET codebase you stayed with long enough to know its history.
.NET 8 or later ideally, though what you did with it matters more than the version number.Ownership of live software: releases you planned, incidents you investigated, production problems you fixed at 6pm on a Friday.Performance work with evidence behind it, across both the C# and the data layer, using Entity Framework or EF Core against SQL Server and Azure SQL.API and service design that survived contact with real load, built in ASP.NET or ASP.NET Core.Mentoring and code review you have already done, with a view on what makes feedback land rather than just get given.Azure in anger: Functions, WebJobs, Blob Storage, and Application Insights when something needs diagnosing.CI/CD and automated build and deployment as part of how you work, not something a platform team handles for you.Tests you wrote and then had to maintain, which is where most people find out what their testing habits are really worth.Secure development practice, in an environment where the data is sensitive and that is not a formality.
Useful but not essential: regulated environments, a major refactor or migration onto modern .NET, considered use of AI-assisted development tooling where you still own what ships.
Apply today for immediate consideration but please note, our customer is unable to sponsor at this time.
