Andrzej Spurgiasz

C# / .NET | ASP.NET Core | REST APIs | SQL Server | Angular | Azure | CI/CD | Docker | Enterprise Applications

Full-Stack .NET Developer with around 4 years of commercial experience developing, modernizing, and maintaining enterprise applications across logistics, order management, and ERP-integrated environments.

My primary focus is backend development with C#, ASP.NET Core, REST APIs, and SQL Server, complemented by hands-on experience with Angular and TypeScript.

I specialize in integrating enterprise systems, optimizing SQL queries and stored procedures, developing secure APIs, and modernizing legacy .NET applications while maintaining business continuity.

Core Expertise:
• Backend: C#, .NET, ASP.NET Core, Web API, REST/SOAP Services, Asynchronous Programming
• Databases: SQL Server, T-SQL, Stored Procedures, Query Optimization
• Integrations & Security: DHL, FedEx, SAP, OAuth 2.0, JWT, mTLS
• Frontend: Angular, TypeScript, RxJS, Angular Material
• Enterprise Systems: Logistics, Order Management, ERP Integrations, Legacy Modernization

Selected Contributions:
• Developed secure REST APIs to automate enterprise data exchange, replacing manual spreadsheet-based workflows.
• Delivered integrations with major logistics providers, including DHL, FedEx, and Dachser, supporting automated shipment processing.
• Modernized legacy .NET and Angular applications and optimized SQL Server queries and stored procedures to improve maintainability and performance.

I enjoy solving complex technical challenges, improving application reliability, and building maintainable solutions that support real business processes.

📍 Warsaw, Poland | Open to Remote and Hybrid opportunities across Poland and the EU
💼 Open to Employment Contracts (UoP) and B2B cooperation
🗣️ English (B2) | Polish (professional working proficiency)
✉️ spurgiaszandrzej@gmail.com