Front end Engineer Lead

Render petabytes of data. 10M row tables. Real-time charts. 60fps interactions. 1B users.

Every millisecond of jank millions of frustrated users. Every KB of JS higher bounce in emerging markets. Youll build the UIs that make massive-scale data feel instant intuitive and beautiful.

This isnt about landing pages. This is about building the most performant complex web apps in SEA.

1. Build Core Product Surfaces

• Own frontend for key product areas: analytics dashboards ML playgrounds content tools or consumer app
• Architect complex SPAs with React/TypeScript: state management routing data fetching code splitting
• Handle hard UI problems: virtualization canvas/WebGL rendering Web Workers WASM offline mode
• Partner with Design PM to ship features fast without sacrificing quality or accessibility

2. Performance at Scale

• Lighthouse 95. TTI < 2s on low-end devices. Bundle size budgets that you enforce
• Optimize for emerging markets: 3G networks low-RAM Android battery efficiency
• Profile and fix jank: React renders layout thrash memory leaks. You live in Chrome DevTools
• Build data viz that doesnt die at 1M points: D3 ECharts custom canvas/SVG

3. Platform & Leverage

• Contribute to Design System: accessible composable React components used by 500 engineers
• Improve DX: build tools CI testing linting. Make it impossible to ship bad code
• Lead: Set frontend architecture standards drive migrations review RFCs for FE
• Mentor other engineers. Run FE guilds brown bags and code labs

4. End-to-End Ownership

• Write tests: Jest RTL Playwright. You dont merge without coverage
• Work with backend on API contracts: GraphQL REST gRPC-web. Push back on bad APIs
• Oncall for your surfaces. If its broken for users you feel it
• Collaborate with Data/ML to make complex data explorable by non-technical users

Must-haves:

• 5 YOE building production web apps with React TypeScript. You know the React render lifecycle cold
• Expert in HTML/CSS/JS fundamentals. Can explain event loop closure and critical rendering path
• Strong CS basics: data structures algorithms systems design. You optimize Big-O not just code
• Experience with modern FE stack: state management like Zustand/Redux/Recoil TanStack Query
• Obsessed with performance and UX. Youve debugged why scroll feels bad and fixed it
• Testing mindset: unit integration e2e. Youve set up CI for FE before
• Product sense: You push back on designs that wont scale and suggest better UX

For Lead Level Add:

• 8 YOE led architecture for a major surface used by millions
• Drove a large migration: class hooks webpack vite JS TS or similar
• Mentored 3 engineers and raised the bar for FE across an org
• Deep expertise in 1 area: WebGL WASM micro-frontends accessibility design systems