Senior Frontend Engineer (React)
About The Position
SeatOS is on a mission to transform and digitize the land & sea travel industry, making all routes instantly bookable by anyone. Part of the leading land & sea transportation group, Travelier, SeatOS is building the dominant Transport Management System (TMS) in APAC.
We are hiring a Senior Frontend Engineer to join our R&D. From complex seat selection UX to responsive admin dashboards, you’ll build polished, scalable interfaces that operators rely on daily. We’re transitioning from legacy UIs to a modern React + MUI stack—if you love designing intuitive user experiences, taming state, and obsessing over component libraries, this is your spot.
In this role you will:
- Own end-to-end development of frontend features in React (18+) and MUI.
- Translate Figma designs into clean, reusable, responsive components.
- Collaborate with backend and product to integrate APIs and evolve UI/UX patterns.
- Help define and extend our internal component system and design tokens.
- Write robust unit and end-to-end tests using React Testing Library and Playwright.
- Optimize performance across devices, especially low-end mobile and tablets.
- Participate in design reviews, grooming, and sprint planning sessions.
Requirements
- 5 + years experience building web apps with modern React (hooks, context, state libraries).
- Deep experience with MUI (v5+) or similar component frameworks.
- Strong understanding of responsive design, accessibility, and UX best practices.
- Proficient in writing modular, maintainable, and typed code with TypeScript.
- Hands-on experience writing end-to-end tests with Playwright.
- Comfortable working in Storybook, Git, and Docker-based dev environments.
- Familiar with integrating REST and GraphQL APIs.
Nice-to-Have
- Experience customizing MUI themes at the design token level.
- Familiarity with monorepos, Vite, Webpack, and modern build tooling.
- Exposure to backend or full-stack environments (Laravel/PHP is a plus).
- Prior work in travel, booking, or admin dashboard-heavy apps.
- Interest in UI performance profiling and Lighthouse optimization.
