Chethiya K.

I build complete SaaS products end to end: React and Next.js frontends, Node.js and Python backends, PostgreSQL and Supabase databases, Stripe billing, Supabase Auth, AWS and Vercel deployment, CI/CD with GitHub Actions. I've shipped 700+ Chrome extensions across Manifest V2 and V3. Recent full-stack SaaS work: a multi-tenant SaaS platform I built end to end with real-time activity feeds, role-based auth, admin dashboards, and Stripe subscription billing, now serving 1M+ active users. SuperX, a full-stack SaaS with a Chrome extension frontend covering auth, analytics dashboards, and payment-ready architecture. TradeStream, a Web3 crypto trading journal. OddsGuard, a live sports analytics platform with automated risk scoring and real-time dashboards. 📊 Additional SaaS and extension products live in production: SuperDev Pro, a dev and design tools extension platform serving 6,000+ professionals with CSS editing, font detection, and export tools. A no-code web scraper SaaS with CSV, JSON, and Excel export for lists, tables, and contact data. CanvasNinja, a tab-detection extension with a companion SaaS dashboard. Extension stack: WXT, Manifest V3, Content Scripts, Shadow DOM, MutationObservers, cross-browser builds for Chrome, Firefox, and Edge, Chrome Web Store publishing and policy compliance. AI integration: Claude API, OpenAI API, LangChain, vector databases, custom AI agents for scraping, writing assistance, compliance checks, and workflow automation. Also comfortable with CRM and API integrations: Salesforce, HubSpot, Zoho, and custom internal APIs for lead generation and data migration. On Upwork I've kept early jobs smaller, real-time sync across Chrome profiles, dynamic page monitoring, React frontends, all delivered on time with strong client feedback on communication and reliability. Now taking on larger full-stack SaaS and Chrome extension builds, MVP development, and ongoing product work, 30+ hrs/week available. 🚀 $25/hr, open to matching your rate or working fixed price. Open to a quick call this week to talk through your build.