Senior .NET Developer — WinForms Modernisation (Remote)

Avanti Recruitment is seeking a senior developer to own and modernise a Windows desktop WinForms platform migrated to .NET 8. You will stay hands-on with C#/.NET, influence architecture and testing, and collaborate with leadership to shape API- and cloud-driven evolution.

The role is based near Heathrow, Colnbrook, with initial 1–2 weeks onsite onboarding, then mostly remote work with occasional office visits. Salary up to £75,000, 25 days holiday, pension and benefits included.

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