.NET Backend Developer with SQL Server

Emagine is looking for a strong backend developer with experience in .Net and SQL Server to build and upgrade API backends.Basic information:Full Remote RoleLong Term B2B ContractRate: 160 pln/h + VATMain Responsibilities:Take ownership of API backend development using .NET / C#.Read and understand existing legacy application logic and translate it into modern, well-structured API endpoints.Lead and support the upgrade of SQL Server (from 2007 to 2025) within the project.Design, optimize, and maintain complex SQL queries, stored procedures, and database structures.Ensure high performance and scalability of the backend and database layer.Work independently on backend, automation, and database-related tasks (no dedicated DBA in the team).Contribute to backend architecture decisions and system improvements.Key Requirements:Strong experience with .NET / C# (backend/API development).Strong hands-on experience with Microsoft SQL Server.Proven experience in:Performance tuningWriting complex queriesStored proceduresDatabase optimizationExperience working on modernization of legacy systems.Strong background in automation.Ability to work independently and take full ownership of backend and database responsibilities.Minimum experience:Mid-level: 5+ yearsSenior: 10+ yearsNice to Have:Experience with legacy technologies (e.g., Classic ASP / VBScript).Experience with large-scale database upgrades or migrations.