Senior Fullstack Developer – C# .NET and React Expert

Our client is a forward-thinking technology firm dedicated to delivering innovative software solutions in the financial sector.

• Minimum 5 years of experience in application development using .NET technologies
• At least 3 years of hands-on experience with React development
• Strong skills in debugging, profiling, and performance analysis
• Knowledge of DDD, Clean Code, SOLID principles
• Familiarity with architectural patterns and asynchronous communication
• Proficiency in TSQL and SQL Server Management Studio
• Experience using Visual Studio for development

Nice to have:

• Experience building mobile application views
• Background in developing financial sector applications
• Experience with test automation tools like Postman or PlayWright
• Knowledge of WCAG standards

• Develop and maintain software in C# (.NET Framework, Standard, Core) according to documented requirements
• Implement front-end solutions using React (version 18 and above)
• Analyze and enhance existing codebases, including legacy systems
• Design and develop scalable architecture solutions
• Collaborate closely with cross-functional teams including testers, analysts, and Product Owners within an Agile SCRUM environment

Polish – fluent (biegły) and English – communicative (spoken and written) required for the role. Candidates from outside the EU can apply if they have the right to work in their country of residence.