.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 Role • Long Term B2B Contract • Rate: 160 pln/h + VAT Main 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 tuning • Writing complex queries • Stored procedures • Database optimization • Experience 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+ years • Senior: 10+ years Nice to Have: • Experience with legacy technologies (e.g., Classic ASP / VBScript). • Experience with large-scale database upgrades or migrations.