Technical writing on web security, authentication systems, and software engineering.
How payment gateway architecture evolves from insecure client-side flows to server-side order creation, webhooks, and reconciliation — and how we applied it at Internware.
Reflections from building my first AI application and learning what it really takes to ship production-ready AI — guardrails, human-in-the-loop, context management, and the difference between SDKs and Agent SDKs.
Learn why single long-lived tokens create UX and security problems, how access and refresh tokens solve them, and the key implementation decisions you need to make.
Understand how Large Language Models like GPT, Claude, and Gemini work under the hood. Learn about tokenization, vector embeddings, positional encoding, transformers, and next-token prediction.
Learn the difference between ML engineers and Applied AI engineers using a simple wheat-to-bread analogy. Discover how LLM APIs power modern AI applications without building models from scratch.
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.