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November 4, 2026
Mid Software Developer (React / .NET)
Mid • On-site
Kalety, Poland
Quick Facts
- Role: Mid Software Developer (React / .NET)
- Work model: Hybrid — 2 to 3 days/week on-site, remaining days remote
- Collaboration: B2B or Employment Contract
Description
You will develop solutions that support real business and operational processes. The frontend is built with React, while the backend is developed in C# / ASP.NET Core and exposes REST API services. You’ll work with CI/CD, ensure software quality and maintainability, and collaborate closely with users and both IT and business teams.
Responsibilities
- Develop the frontend using React
- Create and evolve backend components and REST API services in C# / ASP.NET Core
- Work with CI/CD tools and processes
- Maintain software quality, stability, and maintainability
- Participate in code reviews and work with Git repositories
- Write and maintain unit and integration tests
- Collaborate in a Kanban-based team workflow
- Contribute to solution architecture design
- Analyze user needs and translate them into technical solutions
- Work with the IT team and business representatives
Requirements
- Minimum 2 years of commercial experience building web or business applications
- Very good practical knowledge of CI/CD and software delivery
- Experience with code reviews and maintaining code quality
- Proficiency with Git and code repositories
- Experience creating and integrating REST APIs
- SQL knowledge and relational databases experience
- Experience writing automated tests
- Knowledge of best practices for building and maintaining software
- Ability to independently analyze problems and propose solutions
- Collaboration skills with both technical and business stakeholders
- English skills enabling comfortable work with technical documentation
Benefits
- Real impact on system development: influence decisions on functionality, architecture, and direction
- Direct contact with system users and the ability to observe solutions in real operations
- Full application context: React UI, APIs, and C# / ASP.NET Core backend
- Stable business environment of a long-standing recycling-focused company
- Small team with short decision paths and low bureaucracy
- Flexible employment form: B2B or Employment Contract
- Hybrid model with 2–3 on-site days per week
- Commuting support
- Benefit MultiSport card with co-financing
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