Backend Engineer
Building APIs, authentication systems, and payment workflows with Node.js & AWS
Technical insights on web security, authentication, and modern software engineering
Learn how UPI (Unified Payments Interface) enables instant payments in India. Understand the complete payment flow, security features, and NPCI's role in digital transactions.
Discover how Google OAuth authentication works behind the scenes. Learn about authorization codes, access tokens, refresh tokens, and the complete OAuth 2.0 flow.
Learn how SSL certificates make HTTPS websites secure through asymmetric and symmetric encryption, digital signatures, and the TLS protocol. Complete guide to web security.
Event registration system processing 500+ paid transactions with Cashfree integration, tier-based pricing, and dynamic cart.
Reusable authentication service powering 2 applications with event-driven email delivery via AWS SNS/SQS/Lambda. Features JWT authentication with secure cookies, Google OAuth, and structured logging with correlation IDs in AWS Lambda.
Centralized platform for organizing developer resources with tag-based categorization, full-text search, and public or private visibility controls. Built with ownership-based authorization. Integrated with custom authentication microservice.