Senior .NET Backend Engineer — Remote

Jit Team; Warszawa; Hybrid; PLN 180,000 - 240,000; Full time

Job summary

Jit Team is seeking a backend developer to design, build, and maintain .NET/C# applications, focusing on microservices, distributed systems, and REST APIs for a leading Polish e‑commerce platform. The role emphasizes high availability, performance, and collaboration with product teams and architects.

You will participate in code reviews and mentorship, contributing to architectural decisions and ongoing system improvements while enjoying a fully remote setup with occasional visits to Warsaw or

Qualifications

• Minimum 4 years of professional experience with .NET / C#
• Strong experience in backend development and API design
• Practical experience with microservices and distributed systems
• Good knowledge of SQL and relational databases
• Practical experience with Microsoft Azure
• Very good knowledge of Git
• Understanding of software architecture and design patterns
• Experience with performance analysis and optimization
• Experience with code reviews and preferably mentoring
• Ability to collaborate effectively with product teams, architects, and other technology teams
• English at B2+ level

Responsibilities

• Designing, developing, and maintaining backend applications using .NET / C#
• Developing and maintaining microservices and distributed systems
• Designing and implementing REST APIs for business applications and services
• Participating in software architecture and technical design decisions
• Collaborating with product teams, architects, and other technology teams
• Performing code reviews and ensuring high code quality
• Analyzing and optimizing application performance
• Maintaining and optimizing high-availability systems
• Supporting technical improvements and continuous development of existing solutions
• Sharing knowledge and providing technical mentoring to other team members

Job description

Jit Team is seeking a backend developer to design, build, and maintain .NET/C# applications, focusing on microservices, distributed systems, and REST APIs for a leading Polish e‑commerce platform. The role emphasizes high availability, performance, and collaboration with product teams and architects.

You will participate in code reviews and mentorship, contributing to architectural decisions and ongoing system improvements while enjoying a fully remote setup with occasional visits to Warsaw or