Senior .NET Backend Engineer: API & Integrations (Remote)

Avendra International – Europe is seeking a Senior Backend Developer to scale our eProcurement SaaS platform. You will design, build and maintain high-performance backend services in C# and .NET, and implement secure REST APIs.

This role is remote-first in the UK with occasional London offices for meetings and workshops. You will own integrations with ERP, procurement and finance systems, handle OAuth/OpenID security, and drive reliability.

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