Hi, I am a Tamasru Pain a Full Stack Developer with hands-on professional and freelance experience building production-r

Tamasru Pain  • Peerlist

• Shipped and published a cross-platform personal finance app (Android APK v1.0.1 via EAS Build) with transaction management across 15+ categories, 5-screen analytics dashboard with 3 chart types across Weekly/Monthly/Yearly views with pie charts and heatmaps. • Engineered a full gamification system — daily login/activity streaks, 6 unlockable achievement badges (Early Bird, Budget Master, Super Saver, Night Owl), Silver rank progression, and interactive achievement toast notifications. • Implemented Savings Goals with real-time progress tracking, calendar-based Spending Heatmap, push notifications, biometric authentication, and complete auth flow (Clerk Expo) including Forgot Password.

Expenso – Personal Finance Mobile App

• Architected and shipped a production SaaS form builder with component-based architecture, drag-and-drop canvas (dnd-kit), multi-step form rendering with Framer Motion transitions, and a real-time notifications center with client polling. • Designed an async AI insights pipeline using Upstash QStash to decouple OpenRouter AI workloads from the request cycle; implemented Upstash Redis caching on public embed routes to eliminate redundant DB roundtrips. • Implemented Better Auth (Email + Google OAuth), SMTP email alerts via Nodemailer, and per-response AI summary pages with markdown rendering; deployed serverless on Vercel free tier, achieving sub-200ms response times on cached embed routes.