> Markdown version of [/jobs/ext/2642727-ui-developer](https://www.wearedevelopers.com/jobs/ext/2642727-ui-developer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # UI Developer - **Company:** Siri InfoSolutions Inc - **Location:** Parsippany-Troy Hills, NJ, United States - **Experience:** Experienced - **Contract:** Permanent contract - **Skills:** JavaScript (Programming Language), Application Programming Interfaces (APIs), Agile Methodology, Component-Based Software Engineering, HTML5, Unit Testing, Browser Compatibility, Cascading Style Sheets (CSS), Code Review, JSON, Routing, Regression Testing, Responsive Web Design, System Testing, Systems Integration, TypeScript, Website Wireframe, Enterprise Software Applications, ReactJS, Backend, AngularJS, Integration Tests, Front End Software Development, Restful APIs, Es2015, Api Management - **Published:** August 29, 2026 - **Apply:** https://www.careerjet.com/jobad/us9c052f348d4d7f868db15aed1320be52 ## About the Role Must Have Technical/Functional Skills * 5+ years of overall UI / Front-End development experience. * 3+ years of hands-on experience with React.js or Angular in enterprise application development. * Strong experience with JavaScript, TypeScript, HTML5, CSS3, responsive design, and reusable component development. * Experience integrating UI applications with REST APIs, backend services, and JSON-based data contracts. * Experience working in Agile delivery models with developers, QA, product owners, and business stakeholders. ## Description * Develop front-end functionality using React.js or Angular, JavaScript, TypeScript, HTML5, and CSS3. * Integrate front-end applications with REST APIs and backend services. * Implement client-side validations, error handling, routing, state management, and reusable service layers. * Collaborate with UX designers to convert wireframes and mockups into functional user interfaces. * Collaborate with backend/API teams to review API contracts, request/response payloads, and integration behavior. * Optimize UI performance, page load time, browser compatibility, and application responsiveness. * Ensure accessibility, usability, and responsive design practices are followed. * Participate in code reviews, unit testing, defect fixes, deployment support, and production issue resolution. * Create and maintain technical documentation, component usage notes, and implementation guidelines. * Work with QA teams to support system testing, integration testing, regression testing, and UAT defect resolution., Job Title: Front-End Developer/React Developer Location: Whippany, NJ (Hybrid) Duration: Contract Job Description: Developed scalable and responsive web applications using Rea… + 15 days ago + Apply easily, Role: React.js Developer Location: Whippany, NJ (Onsite) Duration: Contract Required Skills: 5+ years of React.js development experience Strong JavaScript (ES6+), TypeScript,… + 30 days ago + Apply easily ## Related Videos - [Tips and Tricks for Working with JSON](https://www.wearedevelopers.com/videos/1229-tips-and-tricks-for-working-with-json) - [The Resilience of the World Wide Web](https://www.wearedevelopers.com/videos/1281-the-resilience-of-the-world-wide-web) - [But, you're not Facebook](https://www.wearedevelopers.com/videos/378-but-you-re-not-facebook) - [Introducing JSON Structure](https://www.wearedevelopers.com/videos/100219-introducing-json-structure) - [WeAreDevelopers LIVE – Frontend Inspirations, Web Standards and more](https://www.wearedevelopers.com/videos/1761-wearedevelopers-live-frontend-inspirations-web-standards-and-more) - [Can SVG be fast? Rendering a scatter chart with over 10k points](https://www.wearedevelopers.com/videos/100299-can-svg-be-fast-rendering-a-scatter-chart-with-over-10k-points) ## Related Articles - [16 Best Free React UI Libraries in 2025](https://www.wearedevelopers.com/magazine/148-16-best-free-react-ui-libraries-in-2025) - [The Best 7 Frontend Frameworks for Developers in 2025](https://www.wearedevelopers.com/magazine/400-the-best-7-frontend-frameworks-for-developers-in-2025) - [React Developer Salary [2023]](https://www.wearedevelopers.com/magazine/198-react-developer-salary-2023) - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers) - [25 Essential Tools for Front End Developers](https://www.wearedevelopers.com/magazine/210-25-essential-tools-for-front-end-developers) - [Dev Digest 133 - Back to Front](https://www.wearedevelopers.com/magazine/474-dev-digest-133-back-to-front)