.NET Developer

Industry: debt collection

Remote work: 100%

Project language: English

FTE: full-time (if you are 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.