Onyx-Conseil in Spalding, UK, is seeking a Senior Umbraco .NET Developer to own full‑stack projects, influence technical decisions, and deliver modern web applications using C#, .NET Core and Umbraco CMS.
The role includes work on greenfield and existing systems, designing REST APIs, integrating third‑party services, mentoring peers, and helping define development standards for enterprise CMS solutions in a hybrid setup (three days on-site).
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