Dika B.

⭐ Top Rated | 🏆 100% Job Success | 💰 13k+ Earned | ⏳ 2400+ Hours Chrome extension developer for Manifest V3 browser extensions in JavaScript, TypeScript and React plus the SaaS backend behind them. 2,300+ hours of browser extension work on Upwork in 2026 alone, 100% Job Success. Clients keep me for the long run: I've built and maintained the Hotel Ninja extension for 1,400+ hours since January, and another client called me "a browser extension wizard" after a 780-hour contract. EXTENSIONS I'VE BUILT Hotel Ninja - Compares final hotel prices across 7+ booking sites (Booking, Agoda, Trip and more) in one popup. React UI injected with Shadow DOM, real-time pricing from internal site APIs, a Node.js proxy to get around CORS blocking, and smart caching — with zero new permissions requested. InPolicy - Enterprise compliance extension. Flags policy violations in email and chat as employees type, explains the issue inline and offers a one-click AI fix, plus a Google Docs add-on. (Manifest V3, React, TypeScript) WooWA CRM - WhatsApp Web CRM used by thousands of Indonesian SMEs and online shops: lead funnels, quick replies, safe broadcasts, WooCommerce and Google Forms integrations. I refactored the codebase and integrated WPPConnect for stability across WhatsApp Web updates. ChatGPT Sidebar - ChatGPT in Chrome's side panel, with "summarize selection" and screenshot-to-ChatGPT. (WXT, React, TypeScript) HOW I CAN HELP Build a new extension from idea to Chrome Web Store (also runs on Edge and Brave) Take over, fix and maintain an existing extension - or migrate MV2 → Manifest V3 without breaking existing users Inject UI into third-party sites like Gmail, WhatsApp Web and Google Docs with content scripts, side panels and overlays Add AI inside the browser: OpenAI and Gemini assistants, summarizers and automations Web scraping and browser automation, including sites without a public API THE BACKEND BEHIND IT Supabase (Auth, PostgreSQL, Realtime, Edge Functions), Node.js, Next.js and Laravel/PHP APIs, user accounts, subscription billing and license keys, Cloudflare Workers, Docker. Frameworks: Plasmo, WXT or vanilla MV3. Send me your extension idea or the one that's broken and I'll reply with a short plan, timeline and estimate.