We’re looking for a skilled Senior UI Developer to join our Frontend Engineering team.Warsaw, hybridKey Responsibilities:·       Develop and maintain UI components using React or Angular.·       Write clean, testable code in TypeScript and JavaScript.·       Integrate with REST APIs and follow TDD principles.·       Use Webpack, Gulp, or similar tools for build automation.·       Collaborate with designers using Figma and implement rich visuals with ag-Grid, Highcharts, etc.·       Apply asynchronous techniques (Promises, Observables) for optimal performance.·       Contribute to technical discussions and guide UI development best practices.Requirements:·       5+ years of experience in frontend/UI development.·       Strong knowledge of React, Angular, TypeScript, and JavaScript.·       Experience with Node.js, Git, and REST API integration.·       Solid grasp of CSS/JS animations and UI optimization.·       Excellent communication and teamwork skills.·       AWS experience is a strong plus.