https://www.uttamthapa.com/blog Uttam Thapa is a full-stack and AI developer based in Mumbai, India, and the creator of SellerZonee, a SaaS platform for Instagram sellers that he designed, built and maintains. He builds production web applications with React, TypeScript, Node.js and MongoDB, and integrates machine learning into real products. en Sun, 02 Aug 2026 00:00:00 GMT https://www.uttamthapa.com/blog/building-velvet-loop-full-stack-ecommerce-platform https://www.uttamthapa.com/blog/building-velvet-loop-full-stack-ecommerce-platform Fri, 12 Jun 2026 00:00:00 GMT A deep dive into the architecture, challenges, payment integration, deployment process, and lessons learned while building Velvet Loop. Uttam Thapa React Node.js Prisma PostgreSQL Razorpay Ecommerce Case Study https://www.uttamthapa.com/blog/building-golden-leaf-knots-ecommerce-platform https://www.uttamthapa.com/blog/building-golden-leaf-knots-ecommerce-platform Mon, 15 Jun 2026 00:00:00 GMT How I transformed a handmade gifting business from Instagram-based sales into a production-ready ecommerce platform. Uttam Thapa React Node.js Ecommerce Razorpay Prisma PostgreSQL https://www.uttamthapa.com/blog/razorpay-integration-production-ecommerce https://www.uttamthapa.com/blog/razorpay-integration-production-ecommerce Sat, 20 Jun 2026 00:00:00 GMT A complete deep dive into integrating Razorpay with secure payment verification, order processing, inventory management, and production deployment. Uttam Thapa Razorpay Node.js React Prisma PostgreSQL Ecommerce https://www.uttamthapa.com/blog/designing-secure-ecommerce-checkout-flow https://www.uttamthapa.com/blog/designing-secure-ecommerce-checkout-flow Thu, 25 Jun 2026 00:00:00 GMT A deep dive into building a secure checkout architecture that protects payments, inventory, and customer data. Uttam Thapa Checkout Ecommerce Razorpay Node.js React Security https://www.uttamthapa.com/blog/preventing-duplicate-orders-payment-issues-ecommerce https://www.uttamthapa.com/blog/preventing-duplicate-orders-payment-issues-ecommerce Tue, 30 Jun 2026 00:00:00 GMT A deep dive into idempotency, payment verification, inventory consistency, race conditions, and duplicate order prevention in production ecommerce systems. Uttam Thapa Ecommerce Payments Razorpay Backend Prisma PostgreSQL Node.js System Design https://www.uttamthapa.com/blog/building-inventory-management-system-handmade-products https://www.uttamthapa.com/blog/building-inventory-management-system-handmade-products Sun, 05 Jul 2026 00:00:00 GMT A deep dive into inventory tracking, stock validation, transaction safety, and overselling prevention for handmade ecommerce businesses. Uttam Thapa Inventory Ecommerce Prisma PostgreSQL Node.js System Design Handmade Products https://www.uttamthapa.com/blog/cloudinary-image-management-ecommerce https://www.uttamthapa.com/blog/cloudinary-image-management-ecommerce Fri, 10 Jul 2026 00:00:00 GMT A deep dive into building a scalable ecommerce image management system using Cloudinary, Multer, PostgreSQL, and Node.js. Uttam Thapa Cloudinary Image Management Ecommerce Node.js Express PostgreSQL Media Storage https://www.uttamthapa.com/blog/automated-email-notifications-nodemailer https://www.uttamthapa.com/blog/automated-email-notifications-nodemailer Wed, 15 Jul 2026 00:00:00 GMT A deep dive into building automated customer and admin email workflows using Nodemailer, Gmail SMTP, and production-ready ecommerce architecture. Uttam Thapa Nodemailer Email SMTP Gmail Ecommerce Node.js Automation https://www.uttamthapa.com/blog/system-design-basics-production-applications https://www.uttamthapa.com/blog/system-design-basics-production-applications Mon, 20 Jul 2026 00:00:00 GMT System design is not just an interview topic. These are the decisions that are expensive to reverse once an application is live. Uttam Thapa System Design Architecture Node.js Backend Scalability https://www.uttamthapa.com/blog/postgresql-indexing-query-performance https://www.uttamthapa.com/blog/postgresql-indexing-query-performance Fri, 24 Jul 2026 00:00:00 GMT Most applications get slow because of a handful of queries doing far more work than they need to. Here is how to find and fix them. Uttam Thapa PostgreSQL Database Performance Prisma Indexing SQL https://www.uttamthapa.com/blog/core-web-vitals-react-applications https://www.uttamthapa.com/blog/core-web-vitals-react-applications Mon, 27 Jul 2026 00:00:00 GMT The obvious optimisations rarely matter. Most performance wins come from removing something that runs continuously. Uttam Thapa Performance Core Web Vitals React CSS Web Performance https://www.uttamthapa.com/blog/web-application-security-practices https://www.uttamthapa.com/blog/web-application-security-practices Thu, 30 Jul 2026 00:00:00 GMT Most vulnerabilities affecting small applications are well understood and preventable with a handful of consistent defaults. Uttam Thapa Security Node.js Express Validation XSS Webhooks https://www.uttamthapa.com/blog/deploying-full-stack-applications https://www.uttamthapa.com/blog/deploying-full-stack-applications Sun, 02 Aug 2026 00:00:00 GMT Deployment is where a project stops being code and starts being a system. Most surprises are configuration problems in disguise. Uttam Thapa Deployment Vercel Render Supabase DevOps CI/CD