Senior Backend Developer to work on Register of Voters (ROVER) upgrade from ASP.NET MVC 5 /.NET Framework 4.x to the latest.NET.

S.i. Systems · Calgary, Alberta, Canada

Location

Calgary

Job Type

Contract

Posted

March 23, 2026

Job Description

Our public client is looking for a Senior Backend Developer to work on Register of Voters (ROVER) upgrade from ASP.NET MVC 5 / .NET Framework 4.x to the latest .NET.
Must-haves:
5+ years backend development with C#/.NET, including production experience on ASP.NET MVC 5 / .NET Framework 4.x and ASP.NET Core.
Hands‑on migration/modernization experience: upgrading .NET Framework apps to latest .NET with minimal disruption.
Strong EF6 → EF Core migration experience (LINQ/API differences, lazy/eager loading strategies, performance tuning).
Proven experience designing RESTful APIs (versioning, validation, error contracts, auth, rate/perf considerations).
Deep SQL and performance tuning skills on Microsoft SQL Server (indexes, query plans, batching, partitioning where applicable).
Experience building batch data processing and exception handling frameworks...
        

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