.NET Developer

RITS Group is an IT company that offers top-quality software development services for both the Polish and international markets. We are proud to be among the fastest-growing technology companies. Our priority is the quality and innovativeness of the solutions we deliver, and our organizational culture is based on trust, cooperation, and continuous improvement. Location: hybrid / 2 meetings per month at the Client's office in Warsaw Rate: 145–170 PLN net/hour on B2B About the position We are looking for an experienced Back-end Developer to join a team working on an IT project for a large public sector institution. The project involves the development and maintenance of IT solutions supporting the implementation of key processes and handling a large number of users and data. We are looking for someone who will be responsible for the design, development, and optimization of back-end components, as well as cooperation with other members of the project team. Responsibilities * designing and developing software in accordance with project documentation, * designing, creating, and optimizing databases, * designing and building communication interfaces between the server and client (REST API), * testing and debugging software, * reporting on conducted work, * cooperating with the project team within Agile/Scrum methodologies. Requirements * higher education, * a minimum of 5 years of professional experience in IT projects, * a minimum of 3 years of experience gained in projects with a value of at least PLN 100,000 net, * very good knowledge of C#, * experience working with the .NET Core platform, both with web and desktop applications, * practical experience in designing and implementing REST APIs, * knowledge of design patterns and practical experience in implementing Clean Architecture and Domain-Driven Design (DDD) architectures, * knowledge of relational databases MS SQL and PostgreSQL, * ability to optimize SQL queries, create indexes, and stored procedures, * knowledge of ORM technologies: Entity Framework Core and Dapper, * knowledge of authentication, authorization, and data encryption mechanisms, especially JWT, OAuth2, and FIDO2, * ability to create unit and integration tests, * knowledge of Azure DevOps and version control systems, especially Git, * experience in teamwork within Agile/Scrum methodologies, * knowledge of English at a level that allows for free use of technical documentation. This role is not for you, but you have a friend who would be a good fit? Recommend them and get up to PLN 5000. Referral Program: Talent from your network Don't delay and apply now! 9/8/2026/r/3737