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October 8, 2026
.NET React Developer
Senior • On-site
130 - 159 PLN/yr
Warsaw, Poland
Quick Facts
Role: .NET React Developer
Description
Build and maintain enterprise IT solutions for a public-sector project, including SharePoint Online applications and client-side components using React and SharePoint Framework (SPFx). Work across the full lifecycle—design, development, testing, documentation, releases, and 2nd/3rd line support—while optimizing for performance, security, and quality.
Requirements
- Bachelor’s degree (Level 6)
- Minimum 4 years of professional IT experience
- Minimum 2 years of project experience relevant to the profile
- At least 1 relevant certification (Intermediate software development certificate or an equivalent internationally recognized credential)
- Developed front-end solutions under SharePoint Framework (SPFx) and React/JavaScript client-side frameworks
- Advanced consumption of SharePoint data using PnP, SharePoint REST API, and Microsoft Graph API
- Experience building secure client-side components
- Developed server-side code using C#/.NET Framework/SQL, including Web Parts, Event Receivers, and Timer Jobs
- Enforced secure coding principles (OWASP) across both .NET server and JavaScript client code to prevent XSS and SQL injection
- Valid Microsoft certificates relevant to the profile
- Developed SharePoint Online solutions using Power Platform
- English at least B2 level
- Participated in at least one full end-to-end lifecycle of a solution
- UML knowledge and ability to design applications in UML
- Proficiency designing/developing data layer, business logic layer, and UI layer
- Scrum experience and ability to lead technical teams
- Ability to document technical solutions effectively
- Strong problem-solving skills
Responsibilities
- Design and develop the system
- Lead development teams and translate requirements into design
- Optimize software for performance, security, and quality
- Produce technical documentation, estimate effort/time, and set development standards
- Propose technical solutions for business needs and technical problems
- Collect and interpret software metrics
- Manage configuration and releases
- Support requirements analysis, testing, quality assurance, change management, and deployment
- Test solutions, develop testing tools, and prototype solutions
- Provide 2nd and 3rd line support
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