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Full Stack Developer specializing in Chrome Extension development, Web Scraping / scraper bots, AI Video Pipelines, and Custom CRM systems. Top Rated with 100% Job Success, $20K+ earned and 1,000+ hours on Upwork. A modern vibe coder — I combine AI-accelerated speed (Cursor, Claude) with 6+ years of real engineering discipline, so your product ships fast AND built right. 🎯 Get a developer who doesn't just write code — but understands your business, ships on time, and delivers a free project consultation to kickstart your success. ➤ What I Do Best ✅ Chrome Extension Development (Manifest V3, automation & scraping extensions, SEO tools) ✅ Web Scraping & Browser Automation (Puppeteer, Playwright, anti-bot handling, data pipelines) ✅ AI Video Pipeline & AI Video Generation (FFmpeg, TTS, automated YouTube video platforms) ✅ Custom CRM Development (sales CRMs, admin dashboards, role-based platforms) ✅ Full Stack Web App Development (React, Next.js, Node.js, NestJS, TypeScript) ✅ AI Chatbot & LLM Integration (OpenAI, Claude, Gemini) ✅ Real-Time Dashboards (Sockets, Redis) ✅ Secure Document Portals & Payments (Stripe, GDPR-compliant workflows) ✅ API Development (REST, GraphQL, Swagger/OpenAPI) ✅ Infrastructure & DevOps (Docker, NGINX, CI/CD, GitHub Actions) ➤ Recent Wins on Upwork ✅ Custom CRM for financial product sales — "one of the most honest, hardworking and attentive freelancers I have worked with in 10 years on Upwork" (5★) ✅ SEO Chrome Extension + multiple Chrome extension builds & fixes (all 5★) ✅ AI YouTube video generator platform & AI-powered social media scraper (see portfolio) ✅ Web scraping for an Upwork Enterprise client (5★) ➤ Tech Stack Frontend: React.js • Next.js • Angular • Vue.js • TypeScript • Tailwind CSS Backend: Node.js • NestJS • Express.js • PHP (Laravel) Databases: PostgreSQL • MongoDB • MySQL • Firebase • Supabase • Redis Cloud & Deploy: AWS • Vercel • Docker • NGINX • DigitalOcean AI & Integrations: OpenAI • Claude • Gemini • Puppeteer • FFmpeg • Stripe • Twilio • Airtable ➤ Industries I Serve 📌 SaaS & B2B Platforms • HealthTech & Compliance • Real Estate • CRM & Admin Dashboards • E-commerce • Automation & Data Processing ➤ Track Record ✅ 6+ Years Full-Time Professional Engineering ✅ Top Rated | 100% Job Success | $20K+ earned | 1,000+ Upwork hours ✅ Delivered: custom CRMs, Chrome extensions, data scrapers, AI video platforms, HealthTech portals, SaaS tools ✅ Senior Engineer @ OptimGeeks | Ex-Codeteck ➤ Search Keywords Chrome Extension Developer • Google Chrome Extension • Chrome Extension Expert • Web Scraper • Web Scraping Expert • Data Scraping • Scraper Bot • Puppeteer • Playwright • Browser Automation • AI Video Pipeline • AI Video Generation • AI Video Automation • Faceless YouTube Automation • FFmpeg • Vibe Coder • Vibe Coding • Cursor AI • Full Stack Developer • Full-Stack Web Developer • React Developer • Next.js Developer • Node.js Developer • TypeScript Developer • Custom CRM • CRM Development • CRM Developer • SaaS Platform Development • AI Chatbot Integration • AI Agent Development • REST API • GraphQL • Stripe Payment Integration • Real-Time Dashboard • Supabase Developer • Firebase Developer • PostgreSQL • MongoDB 🚀 Let's Build Something Great Whether you need a Chrome extension, a web scraper, an AI video pipeline, a custom CRM, or a full SaaS build — send me a message or invite, and I'll take it from there.

I’m Umer, a Chrome Extension Developer with 6+ years of experience building, improving, and scaling Chrome extensions and browser-based SaaS products used by thousands of real users every day. I work across the complete Chrome extension lifecycle, including Manifest V3, content scripts, background service workers, Chrome APIs, browser automation, message passing, storage, permissions, API integrations, React and TypeScript interfaces, performance optimization, and Chrome Web Store publishing. I can help you with: • Custom Chrome extension development • Manifest V2 to Manifest V3 migration • Browser automation and data extraction • Content scripts and background service workers • Chrome API and third-party API integrations • OAuth, authentication, subscriptions, and payments • Extension performance, debugging, and maintenance • Chrome Web Store submission and rejection fixes • React dashboards and SaaS platforms connected to extensions Some of my previous work includes: WAWCD, WA Chrome CRM Extension wawcd .com A Chrome extension with 70,000+ downloads, 10,000+ reviews, and more than 20,000 active users. I built and improved its extension interface, browser automation workflows, dashboard integrations, and frontend performance to support heavy daily usage. Prospeo, Lead Generation Extension prospeo .io A browser extension used by 40,000+ professionals for email discovery and data enrichment. I worked on its React and TypeScript frontend, API-driven workflows, in-browser interactions, and performance during continuous use. MakeTheDot, Browser-Based Collaboration Platform www. makethedot. com A collaborative platform connecting design, development, and merchandising workflows. I worked on its responsive frontend, real-time collaboration features, browser-based workflows, and Chrome extension functionality. My primary stack includes JavaScript, TypeScript, React, Next.js, Node.js, Chrome Extensions API, PostgreSQL, Supabase, and WebSockets. I can handle both the extension itself and the SaaS dashboard, authentication, APIs, and backend systems supporting it. I’m usually brought in when a Chrome extension needs to be built from scratch, migrated to Manifest V3, connected to an existing SaaS product, approved for the Chrome Web Store, or fixed because it has become slow, unstable, or difficult to maintain. Share your extension requirements, existing codebase, or Chrome Web Store link, and I’ll review the best way to build or improve it.

Need a reliable developer to build, fix, or extend your software? I develop full-stack web applications, Claude, Codex, Python/FastAPI backends, REST APIs,bots, third-party integrations, workflow automations, and production AI features. I can own an MVP end to end or handle a focused task such as a backend bug, API integration, web feature, WordPress/WooCommerce fix, RAG search, chatbot, or deployment. What I can build or fix: • Python/FastAPI backends and REST APIs • Full-stack web features, dashboards, and internal tools • Third-party API, webhook, and workflow integrations • AI integrations using OpenAI, Gemini, RAG, agents, and structured outputs • WordPress, WooCommerce, PHP, and JavaScript customizations • Docker, PostgreSQL, cloud deployment, testing, and debugging Selected work: • Built an AI pipeline that converted unstructured clinical-trial PDFs into structured HL7 FHIR resources • Developed a clinical NLP decision-support workflow with structured outputs and safety constraints • Built a FastAPI quantitative research and backtesting platform • Deployed an OpenAI-compatible vLLM inference API on cloud GPU infrastructure I focus on reliable delivery: clear scope, regular updates, maintainable code, testing, documentation, and a clean handoff. Top Rated • 100% Job Success • 0–4 hour average response time Send me your requirements or current technical problem. I’ll respond with the likely approach, the first implementation steps, and a realistic estimate.

I’m a Senior Software Engineer with 5 years of professional experience. I can help turn your existing business logic and processes into a clean, reliable portal/website and automation workflows. I’ve built and maintained large-scale web applications using Python, Node.js, SQL, and modern web technologies. I also have strong experience building automation workflows and integrating different systems and APIs. I’m a heavy AI user and use AI extensively in my development workflow to move faster, troubleshoot issues, and build better solutions. I’d be happy to understand your current process and see how I can help.