⬡ Node.js
Featured
Understanding the Node.js Event Loop
A deep dive into all 6 phases of the event loop — timers, poll, check, and everything in between. Learn exactly what runs when.
Engineering Blog
Code, concepts
& deep dives
Practical write-ups on JavaScript, Node.js internals, CSS, and the tools that make the modern web tick.
✦ Featured post
🍃 Mongodb
MongoDB: Beginner to Advanced
A complete guide to MongoDB — from setup and CRUD to indexing strategies, aggregation pipelines, transactions, and production best practices.
🌐 HTTP
HTTP Idempotency Explained
What idempotency really means, why PUT and POST behave differently, how idempotency keys prevent double-charges, and the retry strategies every backend engineer should know.
🌐 HTTP
HTTP Status Codes Explained
Every HTTP status code a backend developer actually needs to know — what they mean, when to use them, and the mistakes that make APIs confusing to consume.
⚙️ DevOps
Making Redis Publicly Accessible on Oracle Cloud
ConnectionTimeoutError, No route to host, tcpdump, and the iptables rule order that blocks everything — a real debugging journey from a broken Redis setup to a working production connection.
⚛️ React.js
The Complete Guide: All 19 React Hooks Explained In Detail
The definitive masterclass covering every single React Hook in extreme detail — from useState to useOptimistic. Includes dependency array breakdowns, code examples, gotchas, and real-world patterns.
⚛️ React.js
DOM vs Virtual DOM: The Complete Breakdown
Understand the real difference between the browser's DOM and React's Virtual DOM. Learn how reconciliation, diffing algorithms, and Fiber architecture actually work under the hood.