Senior Fullstack Developer (.NET & React)

Ignite innovation in software development - shape the future with cutting-edge .NET and React solutions! Warsaw or Gdańsk-based opportunity with hybrid work model (1day/ week in the office). As a Senior Fullstack Developer, you will be working for our client, a leading technology innovator. You’ll contribute to building sophisticated applications by leveraging your expertise in C# and React, helping to deliver impactful digital solutions. Join us and propel your career into new dimensions of success and innovation. Your main responsibilities: Develop high-quality software using C# (.Net Framework, .Net Standard, .Net Core) in accordance with technical documentation. Implement frontend features and interfaces with React (versions 18+). Analyze and enhance existing codebases, including legacy systems. Design and develop scalable architecture solutions. Collaborate closely with cross-functional teams—testers, analysts, and product owners—within 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. It is a strong plus if you have: Experience in creating views for mobile applications. Background developing solutions for the financial sector. Knowledge of test automation tools like Postman or PlayWright. Familiarity with WCAG standards. You should have: Minimum 5 years of software…