.NET Developer

Industry: debt collection Remote work: 100% Project language: English FTE: full-time (if you're interested in part-time, it's also ok) Project length: until the end of 2026 + prolongations Start: ASAP Assignment type: B2B Remuneration: up to 180 PLN/h Job Summary: The .NET Developer will be primarily responsible for maintaining and developing an existing self-service portal used by customers and clients, which incorporates legacy code as well as newer components. Responsibilities: Maintain and stabilize an existing ASP.NET application, ensuring uptime and functionality. Perform IIS hosting and configuration for the application. Understand legacy authentication patterns to facilitate secure access. Work with poorly documented codebases, improving clarity and stability. Periodically develop new features as required by the project. Must Haves: Proficient in ASP.NET Web Forms / classic .NET technology (e.g., client_login.aspx). Experience with IIS hosting and configuration. Strong understanding of legacy authentication methods. Ability to read and stabilize poorly documented codebases. Nice to Have: Familiarity with newer development practices and components (e.g., ASP.NET MVC Core). Experience with MS SQL, including queries and stored procedures. Knowledge of application maintenance workflows.