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MADIFF Polska

Senior Fullstack Developer .NET + React

MADIFF Polska Warsaw, Masovian Voivodeship, Poland

IT Services and IT Consulting · 51-200 employees

13 h ago
react Senior (5-10 yrs) Full-time Contractor Poland
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About the role

Develop and maintain software solutions using C#/.NET and React within a microservices architecture. Collaborate with cross-functional teams to design functionality, optimize performance, and ensure high-quality delivery in a Scrum environment.

What they look for

C# .NET React Microservices Solution architecture TSQL SQL Management Studio Visual Studio DDD Clean Code SOLID Asynchronous communication Debugging Performance analysis Scrum

Requirements

Requires at least 5 years of commercial .NET experience and 3 years of commercial React experience. Candidates must possess strong knowledge of architectural patterns, DDD, SOLID principles, and TSQL.

Benefits

Flexible hybrid model Competitive salary Multinational environment Comprehensive healthcare Long-term B2B contract

Full description

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

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