Senior Software Engineer (.NET/C#) - Logistics team @ Grupa Allegro Sp. z o. o.

We are looking for people who have: Core Technical Stack & Architecture: Extensive experience architecting high-throughput, low-latency backend systems using C# and .NET Core / ASP.NET Core ; mastery of resilient RESTful APIs , modular monoliths, and microservices; deep expertise in relational database optimization using PostgreSQL and Entity Framework Core under high-concurrency workloads; pragmatic experience with legacy protocols ( SOAP/WCF ). Infrastructure & Distributed Systems: Hands-on p…