Middle Front-End Developer with React.js
Trinetix · Warsaw, Masovian Voivodeship, Poland
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- Company
- Trinetix
- Location
- Warsaw, Masovian Voivodeship, Poland
- Posted
- June 17, 2026
About this job
We are seeking a skilled and motivated Mid-Level Front-End Developer with a strong background in JavaScript and jQuery, and a focus on React development. In this role, you will be responsible for converting legacy jQuery applications into modern, maintainable React apps as well as building new React applications from the ground up. You will be part of a dynamic team working on both greenfield and migration projects, ensuring a smooth transition from older codebases to modern frameworks while maintaining high standards of performance and code quality. Key Responsibilities: Migrate jQuery-based Applications: Convert and refactor existing jQuery applications into React applications, ensuring functionality, performance, and a seamless user experience are maintained during the transition. Devel…
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