Senior .NET Developer

Salary: 1040–1200 PLN/h on B2B

Work model: Fully remote

Why choose this offer?

• Impact on the development of the largest e-commerce system in Poland
• Flexible work organization
• Long-term cooperation within a stable ecosystem
• Regular integration meetings

Project

Development and maintenance of backend applications based on .NET, including the design and development of microservices and distributed systems. The project involves building and integrating APIs supporting business applications and services, optimizing high-availability solutions, and contributing to architectural decisions and technical design. Close collaboration with product teams, architects, and technology teams, with a strong focus on code quality, performance, and continuous improvement.

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

Expected competences and knowledge

• 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

Nice to have

• Kubernetes
• Docker
• Event Sourcing
• PowerShell/Bash
• Azure DevOps

Technologies you'll work with

• C# / .NET / ASP.NET Core
• REST APIs
• Microservices & distributed systems
• Microsoft Azure
• SQL / SQL Server
• Git
• Docker
• Kubernetes
• Azure DevOps
• Event Sourcing
• PowerShell / Bash