Fullstack Developer (.NET + React & React Native)
New
H
H2B GroupFitness technology
100% zdalnie z PolskiContractSenior
Salary120 - 165 PLN per hour net b2b
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Job Details
- Languages
- Płynny język polski (warunek konieczny) oraz język angielski na poziomie min. B2 (w mowie i piśmie).
- Experience
- Min. 3 lata dla poziomu Mid / min. 5 lat dla poziomu Senior.
- Required Skills
- DockerMicrosoft SQL ServerReact NativeTypeScriptC#ASP.NET Web APIAzure.NETReact
Requirements
- Have at least 3 years of commercial experience for Mid level or 5 years for Senior level.
- Demonstrate proficiency in C#, .NET Core/.NET 8+, ASP.NET Web API, Entity Framework Core, and SQL Server.
- Have practical experience with React, React Native, TypeScript, JavaScript, HTML5, and CSS3.
- Know Clean Code, SOLID, and design patterns.
- Use AI-assisted coding tools in daily work, such as GitHub Copilot, Claude Code, ChatGPT, or OpenAI API.
- Be fluent in Polish and have English at minimum B2 level, spoken and written.
- Work independently and stay organized in a remote-work environment.
- For Senior level, have practical microservices and cloud-native experience and participate in architecture design.
- For Senior level, know Azure services including App Services, Service Bus, Azure SQL, and Azure DevOps.
- For Senior level, have good knowledge of Docker.
- For Senior level, take ownership of delivered solutions and support the team in key technical decisions.
Responsibilities
- Design and implement features for the React Native mobile app, React web panel, and C#/.NET server.
- Create services and REST APIs using .NET Core/.NET 8+ and SQL Server.
- Integrate the platform with external payment gateways and notification systems.
- Write unit and integration tests.
- Conduct code reviews and maintain technical documentation.
- Collaborate with the team on application deployment processes.
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