.NET Developer

Cosinus is a company located in Łódź, Poland, offering employment based on a permanent contract. The company works on projects using modern Microsoft technologies and has an established market position.

• Commercial experience in C#/.NET
• Knowledge of C# and .NET platform (.NET 8+)
• Experience with DotNetNuke (DNN) platform including module creation, customization, and deployment
• Practical knowledge of SQL and relational databases, specifically Microsoft SQL Server (MSSQL)
• Familiarity with ASP.NET Core Web API
• Experience with GIT and working with Visual Studio / Visual Studio Code
• Understanding of clean code principles and good programming practices
• Knowledge of unit and integration testing
• Ability to read technical documentation in English
• Ability to work independently and in a team

Nice to have:

• Knowledge of PostgreSQL
• Experience using AI tools in daily programming
• Experience with Flyway or other database migration tools
• Participation in personal or open source projects
• Relevant education or ongoing studies in computer science

• Creating and maintaining APIs (ASP.NET Core Web API) and background jobs in C#/.NET
• Designing and optimizing SQL queries and managing database migrations (MSSQL, Flyway)
• Developing and maintaining applications based on the DotNetNuke (DNN) platform
• Participating in code reviews and task planning
• Writing unit and integration tests
• Analyzing and resolving current technical issues
• Ensuring code quality, readability, and correctness

Please be informed that the data controller is Fundacja Tabuz. You have the right to request access to your personal data, their rectification, erasure or restriction of processing, the right to object to processing, as well as the right to data portability and to lodge a complaint to the supervisory authority. Personal data will be processed for the purpose of the recruitment process. Provision of data to the extent resulting from the Act of 26 June 1974 Labour Code is mandatory. In the remaining scope, providing data is voluntary. Refusal to provide mandatory data may result in the impossibility to carry out the recruitment process. The Administrator processes mandatory data on the basis of a legal obligation incumbent upon him/her, while with regard to additional data, the basis for processing is consent. Personal data will be processed until the recruitment procedure is completed and for the period of the possibility of asserting potential claims, and in the case of consent to participate in future recruitment procedures - until the withdrawal of such consent. Consent to the processing of personal data can be withdrawn at any time. The recipient of the data is the Just Join IT service and other entities to whom we have entrusted the processing of data in connection with recruitment.