Software Developer C# Freelancer

Project Overview We are looking for an experienced Freelance C# Developer to support an API integration project within a distributed system landscape. The project focuses on the development, extension, and stabilization of backend services and system interfaces. You will work closely with architects, DevOps engineers, and product stakeholders in an agile environment. Your Responsibilities Design and development of RESTful APIs using C# / .NET (Core or .NET 6+) Integration of internal and external systems via APIs Implementation of business logic and backend services Optimization of existing interfaces and performance improvements Error analysis, debugging, and stabilization of data flows Writing unit and integration tests Collaboration in an agile (Scrum/Kanban) team Supporting CI/CD and deployment processes Required Skills Strong experience in C# and .NET (Core / .NET 6+) Proven experience with REST API development and integration Experience with Entity Framework or similar ORM Solid understanding of microservices architecture Experience with SQL databases (e.g., MS SQL Server, PostgreSQL) Familiarity with Git and CI/CD pipelines Experience working in agile teams Strong communication skills in English