Senior Fullstack Developer .NET + React
⚲ Warszawa, Gdańsk
20 160 - 21 840 PLN netto (B2B)
Wymagania
- .Net
- React
- C#
- DDD
- SOLID Principles
- T-SQL
Opis stanowiska
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.
Key responsibilities
• Develop software in C#/.NET based on technical and functional documentation.
• Implement frontend features in React.
• Analyse, maintain, and extend existing code, including legacy code.
• Contribute to solution architecture and technical design.
• Debug, profile, and analyse application performance.
• Collaborate closely with the delivery team: Testers, Analysts, and Product Owner.
• Work in Agile methodologies, especially Scrum.
• Ensure code quality, maintainability, and alignment with development best practices.
Requirements
• 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.
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.
Key responsibilities
• Develop software in C#/.NET based on technical and functional documentation.
• Implement frontend features in React.
• Analyse, maintain, and extend existing code, including legacy code.
• Contribute to solution architecture and technical design.
• Debug, profile, and analyse application performance.
• Collaborate closely with the delivery team: Testers, Analysts, and Product Owner.
• Work in Agile methodologies, especially Scrum.
• Ensure code quality, maintainability, and alignment with development best practices.
Requirements
• 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.
🔍 Dekoder Ogłoszenia
🔴
analysis/improvement of existing code, including legacy components
Duża część pracy będzie polegać na utrzymaniu i refaktoryzacji starego kodu, co może być czasochłonne i frustrujące.
🟡
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.
Oczekuje się, że będziesz aktywnie uczestniczyć w dyskusjach architektonicznych i projektowych, a nie tylko realizować zadania.
🟡
Minimum 5 years of experience developing applications in .NET.
Może oznaczać zarówno doświadczenie w pracy z różnymi wersjami .NET, jak i głębokie zanurzenie w jednym konkretnym ekosystemie.
🟡
Minimum 3 years of experience developing applications in React.
Podobnie jak w przypadku .NET, może to oznaczać szerokie doświadczenie lub skupienie na konkretnym aspekcie Reacta.
🔴
Good
Brak doprecyzowania, co oznacza 'dobra' znajomość, może sugerować, że oczekiwania są elastyczne lub nie do końca jasno określone.