Senior Fullstack Developer (.NET & React)

Our client is a leading technology innovator developing sophisticated applications leveraging C# and React technologies.

• Minimum 5 years of software development experience in .NET applications
• At least 3 years working with React
• Proficiency in Polish (fluent) and communicative English (minimum B2)
• Well-developed analytical thinking abilities
• Excellent organizational skills with attention to quality and deadlines
• Secondary education, preferably higher education in computer science or related fields

Nice to have:

• Experience creating views for mobile applications
• Background developing solutions for the financial sector
• Knowledge of test automation tools such as Postman or Playwright
• Familiarity with WCAG standards

• Develop high-quality software using C# (.Net Framework, .Net Standard, .Net Core) per technical documentation
• Implement frontend features and interfaces with React 18+
• Analyze and enhance existing codebases, including legacy systems
• Design and develop scalable architecture solutions
• Collaborate closely with testers, analysts, and product owners in agile (SCRUM) environments
• Debug, profile, and optimize application performance
• Apply best practices such as DDD, CleanCode, and SOLID principles
• Work with SQL Server and TSQL using SQL Management Studio
• Utilize Visual Studio for development processes

Only candidates with existing legal right to work in the European Union will be considered for this role.