Senior Full-Stack Developer (.NET & React)

Quick Facts

Senior Full-Stack Developer role using C#/.NET and React (18+), with a hybrid setup (1 day/week in the office).

Description

Build and enhance sophisticated applications using C#/.NET and React. You will deliver backend and frontend features, improve legacy codebases, design scalable architecture, and optimize performance in an agile Scrum team environment.

Responsibilities

• 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 with cross-functional teams (testers, analysts, product owners) in agile (Scrum) environments
• Debug, profile, and optimize application performance
• Apply best practices such as DDD, CleanCode, and SOLID
• Work with SQL Server and T-SQL using SQL Server Management Studio
• Utilize Visual Studio for development processes

Requirements

• Minimum 5 years of software development experience with .NET applications
• At least 3 years working with React
• Polish proficiency (fluent) and communicative English (min. B2)
• Strong analytical thinking
• Excellent organization skills and attention to quality and deadlines
• Secondary education, preferably higher education in computer science or related fields
• Existing legal right to work in the European Union

Benefits

• Hybrid work model (1 day/week in the office)
• Work on modern .NET and React solutions with an innovative team