Senior Fullstack Developer (.NET & React)

Ignite innovation with transformative full-stack solutions — shape the future of software engineering!

Warszawa/ Gdańsk - based opportunity with hybrid work model(1 day/ week in the office).

As a Senior Fullstack Developer (.NET & React), you will be working for our client, a leader in the technology sector dedicated to developing scalable and efficient software solutions. You will contribute to creating cutting-edge applications that drive digital transformation and provide impactful user experiences. This role offers a unique chance to grow your career amidst a forward-thinking team that values innovation and excellence.

Your main responsibilities:

• Develop high-quality software in C# ensuring adherence to technical documentation.
• Implement front-end features using React (18 and above) to deliver dynamic user interfaces.
• Analyze and enhance existing legacy code bases, ensuring consistent performance.
• Design and develop robust application architectures aligned with best practices.
• Collaborate closely with testers, analysts, and product owners within Agile (SCRUM) methodologies.
• Conduct debugging, profiling, and performance analysis to optimize application efficiency.
• Apply principles of DDD, Clean Code, and SOLID to maintain code quality and scalability.
• Work with TSQL and SQL Management Studio to develop and optimize database interactions.

You are ideal for this role if you have:

• At least 5 years of experience in developing .NET applications.
• A minimum of 3 years in React-based front-end development.
• Strong knowledge of C# (.NET Framework, .NET Standard, .NET Core).
• Skilled in debugging, performance profiling, and analyzing complex code.
• Proficiency in architectural patterns, asynchronous communication, and software design.
• Experience with TSQL and SQL Server Management Studio.
• Familiarity with Visual Studio.

It is a strong plus if you have:

• Experience building views for mobile applications.
• Background developing applications for the financial industry.
• Automation testing experience with tools like Postman or PlayWright.
• Knowledge of WCAG standards.

Language Required for the role:

• Polish (bilingual proficiency)
• English (communicative level, minimum B2)

Eligibility to work in Europe:

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

#MAKEYourCareerBETTER

Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.

Tech stack

• C# / .NET
• React
• SQL / TSQL
• Software Architecture
• DDD / SOLID / Clean Code
• Debugging & Performance Profiling
• Agile / Scrum
• Mobile Application Development
• Automation Testing (Postman / Playwright)
• WCAG Standards