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Budget: USD 8,000-9,000
Post time:
We seek a Senior Web Frontend Developer to drive core feature development for a high-concurrency, highly available SaaS platform. Requirements: ① Expertise in HTML5 semantics, CSS3 (Flexbox/Grid), ES6+ JavaScript, and async patterns (Promise/async-await); ability to write framework-free, performant DOM code; ② ≥3 years React production experience—Hooks, Context, React Router v6; SSR (Next.js) or micro-frontend (qiankun) experience preferred; ③ Strong Vue.js 3 skills (Composition API + Pinia); proven ability to work across React/Vue or migrate between them; ④ Deep TypeScript mastery—type design, generics, custom d.ts files; ⑤ Proficiency in Webpack/Vite configuration and build optimization (Tree-shaking, Code-splitting); ⑥ Git expertise (Git Flow/TBD), unit testing (Jest + RTL), and E2E testing (Cypress); ⑦ Proven SPA optimization (Lighthouse ≥90, TTFB <1s), memory leak detection, DevTools debugging;