Senior React JS Developer (high-performance, low-latency front-end apps exp is must)

Singapore 2 days agoContractor External
54.5k - 70.8k / mo
Optimum Solutions (Registration Number: 199700895N) is Singapore's leading Information Technology , Consulting and Professional Services company with Competence in Digital Transformation, Automation, Robotics, Cloud, Big Data, Analytics and Emerging technologies projects. Optimum has been successfully delivering IT projects since 1997 and has been a key IT service provider to clients delivering Software Design, Development, Engineering and IT Transformation Projects. • 10+ years of experience in Web/UI development. • Strong hands-on experience with React. • Proven experience building high-performance, low-latency front-end applications. • Solid understanding of JavaScript, TypeScript, HTML5, CSS3. • Experience working with real-time data streaming, WebSockets, or event-driven UI architectures. • Strong knowledge of UI performance optimization techniques. • Experience integrating with REST APIs and real-time backend services. • Familiarity with Git-based version control and modern CI/CD pipelines. • Strong problem-solving skills and ability to work in a fast-paced Front Office environment. Desired • Expertise with Angular web development and AG Grid • Experience with unit‑testing frameworks such as Karma and Jasmine, and end‑to‑end testing frameworks, particularly Playwright • Experience with the OpenFin platform • UI design for low latency pricing and execution • Working knowledge of resilient software design