Work Mode: Freelance / Part-timeLocation: RemoteCooperation Model: Flexible (standby / on-call duties)We are looking for a .NET Developer to support second-line support (2nd line) in one of our projects. The role is based on an on-call / standby model, with schedules planned in advance together with the team.Tickets are assigned after initial analysis on the client’s side – this is not 1st line support nor a call center. The team consists of developers and a coordinator (PM).Project 24/7 on-call duty Responsibilities Handling service requests (2nd line support) Analyzing and diagnosing issues in .NET applications Bug fixing in existing codebases Working with REST APIs Collaboration with other developers (backend, frontend, mobile) Testing the correctness of implemented fixes Direct communication with the client regarding reported issues Work Model No fixed number of working hours Flexible model based on rotational on-call duties On-call schedules planned in advance together with you Clear communication of availability and ticket acceptance is essential CompensationStandby / On-call: 180 PLN per weekday (24h) 250 PLN per weekend day (24h)➕ Hourly rate for actual work performed Requirements Min. 3years of experience in .NET backend development Good proficiency in C#, ASP.NET Core API, and Entity Framework Core Experience with SQL Server, Docker, and Redis Familiarity with asynchronous communication (RabbitMQ or similar) Experience with unit testing frameworks (xUnit or similar) Strong problem-solving skills and focus on performance and scalability Availability for on-call work Nice to Have Experience in 2nd / 3rd line support Experience with high-availability systems (SLA, on-call) Knowledge of monitoring and logging tools Experience in direct communication with clients We value your trust in providing us your data, thus we are striving to use commercially acceptable means of protecting it. Below you will find the necessary information about the data we collect and process when you send us your CV.The controller of your personal data is Miquido Spółka z ograniczoną odpowiedzialnością sp. k. with its seat in Krakow, Zabłocie 43a, 30-701 Kraków, Poland (“Miquido”, “We”, “Our” or “Us”). See more