Senior Fullstack Developer .NET + React
Summary
Senior fullstack developer in an Agile team building business applications: C#/.NET backend, React 18+ frontend, plus code analysis and improvement of legacy components. Uses T-SQL/SQL Server, Visual Studio, and applies DDD/Clean Code/SOLID.
We are looking for a Fullstack .NET Developer to work on the development of business applications in an Agile environment. The role combines backend development in C#/.NET, frontend implementation in React 18+, and analysis/improvement of existing code, including legacy components.
This position is a good fit for someone who enjoys working closely with a delivery team, cares about code quality, and can contribute not only to implementation but also to solution design.
- Minimum 5 years of experience developing applications in .NET.
- Minimum 3 years of experience developing applications in React.
- Very good knowledge of C# and the .NET ecosystem:
- .NET Framework,
- .NET Standard,
- .NET Core,
- .NET.
- Experience with React 18+.
- Strong debugging, profiling, and performance analysis skills.
- Knowledge of DDD, Clean Code, and SOLID principles.
- Understanding of architectural patterns and asynchronous communication.
- Good knowledge of T-SQL and SQL Server Management Studio.
- Experience working with Visual Studio.
- English at B2 level or higher.
- Fluent Polish.
Nice to have
- Experience building views for mobile applications.
- Experience developing applications for the financial sector.
- Test automation experience, e.g. Postman, Playwright.
- Knowledge of WCAG accessibility standards.