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Senior .Net Engineer

N-iX | barcelona, Spain | Posted June 02, 2026

Position Overview

N-iX is looking for a Senior .Net Engineer for one of our clients.

As a .NET Engineer you will drive the technical modernization of a large‑scale system from .NET Framework 4.8 to .NET 8. Your work will span the full backend stack — replacing Windows‑only dependencies, refactoring legacy patterns, migrating data access to EF Core, and ensuring every service is portable, containerisable, and ready for AWS cloud deployment. You will collaborate closely with DevOps and database engineers as part of a cross‑functional Agile team delivering a phased, production‑safe migration.

Responsibilities

  • Migrate a .NET Framework 4.8 application to .NET 8.
  • Migrate a large database‑first Entity Framework 6 model to EF Core 8 across multiple bounded contexts, one domain at a time.
  • Identify and replace Windows‑only libraries and assembly references that prevent building and running on Linux.
  • Establish unit test coverage measuremen...

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