Senior Fullstack Developer .NET + React
About this role
We are looking for a Senior Fullstack Developer to join a new banking project focused on developing a microfactoring platform. The role combines backend development in C#/.NET with frontend development in React, working across microservices and existing applications while contributing to solution architecture, performance optimisation, and high-quality software delivery within a Scrum team.
Responsibilities
• Develop software in C#/.NET
• Develop frontend functionality in React
• Analyse and develop existing code
• Work with legacy applications where required
• Participate in solution architecture
• Design and develop new functionality
• Debug and profile applications
• Analyse application performance
• Work with relational databases and TSQL
• Work with asynchronous communication patterns
• Cooperate closely with Developers, Testers, Analysts and Product Owner
• Participate in Scrum delivery
• Maintain code quality and development standards
Requirements
• Minimum 5 years commercial .NET development experience
• Minimum 3 years commercial React development experience
• Strong C#
• .NET Framework
• .NET Standard
• .NET Core / modern .NET
• React 18+
• Debugging and profiling
• Performance analysis
• DDD
• Clean Code
• SOLID
• Architectural patterns
• Asynchronous communication
• TSQL
• SQL Management Studio
• Visual Studio
• Fluent Polish
• English minimum B2
Nice to have
• Experience developing mobile application views
• Banking or financial services experience
• Automated testing
• Postman
• Playwright
• WCAG
Benefits
• Flexible hybrid model (1 day/week onsite in Warsaw/Gdańsk)
• Solid, competitive salary
• Work in a multinational environment on international projects
• Comprehensive healthcare
• Long-term B2B contract with a stable project pipeline
Frequently Asked Questions
Is the salary disclosed for the Senior Fullstack Developer .NET + React position at madiffpl?
The salary for this Senior Fullstack Developer .NET + React role at madiffpl is not publicly listed. Click "Apply Now" to learn more about the compensation package on their official careers page.
Where is the Senior Fullstack Developer .NET + React position at madiffpl located?
This Senior Fullstack Developer .NET + React role at madiffpl is based in Warsaw, Poland. The position is listed as on-site or hybrid. Check the full job description or apply directly to confirm the work arrangement.
Is the Senior Fullstack Developer .NET + React role at madiffpl full-time or part-time?
This is listed as a Full time position. It is posted as a Senior Fullstack Developer .NET + React role at madiffpl.
How do I apply for the Senior Fullstack Developer .NET + React position at madiffpl?
Click the "Apply Now" button on this page. You will be redirected to madiffpl's official application portal hosted on zohorecruit where you can submit your application directly.
When was the Senior Fullstack Developer .NET + React job at madiffpl posted?
This Senior Fullstack Developer .NET + React position at madiffpl was posted on Sep 22, 2026. Apply as soon as possible — early applications are often reviewed first.
Senior Fullstack Developer .NET + React
madiffpl
You'll be redirected to madiffpl's official application page on zohorecruit.