C# Backend Developer

Quick Facts

• Role: C# Developer (Backend)

• Focus: Backend APIs, AWS cloud services, microservices, event-driven architecture

Description

Develop and maintain backend applications and APIs using C#/.NET 8 and ASP.NET Core Minimal APIs. Build cloud-based solutions on AWS (S3, SQS, Lambda, DynamoDB, Cognito), design data access with Entity Framework Core and PostgreSQL, and contribute to microservices and event-driven architectures using Clean Architecture. Write and maintain unit tests and collaborate with the team through code reviews and troubleshooting.

Responsibilities

• Develop and maintain backend applications and APIs using C#/.NET 8 and ASP.NET Core Minimal APIs

• Build cloud-based solutions using AWS services (S3, SQS, Lambda, DynamoDB, Cognito)

• Design and implement data access layers with Entity Framework Core and PostgreSQL

• Contribute to microservices and event-driven architectures following Clean Architecture principles

• Write and maintain unit tests to ensure code quality and application reliability

• Collaborate with team members in code reviews, troubleshooting, and continuous improvement

Requirements

• Around 2 years of commercial experience in software development with C# and .NET

• Hands-on experience with ASP.NET Core

• Hands-on experience with Entity Framework Core and PostgreSQL

• Practical knowledge of AWS cloud services and containerization using Docker

• Understanding of Clean Architecture, REST APIs, and software design principles

• Experience with unit testing frameworks such as NUnit, Moq, and FluentAssertions

• Good English and Polish communication skills and willingness to learn modern cloud-native technologies

Benefits

• Develop yourself and the digital future

• Opportunity to work on modern cloud-native technologies