Zod in Practice: Validating Everything in a Node.js API
TypeScript types vanish at runtime, so your API needs real validation. Learn how to use Zod to validate request bodies, query params, enviro...
Oct 13, 2026
6 min
Top Node.js Libraries Every Developer Should Know
Node.js has thousands of packages for every problem, and picking the wrong one means migrations and abandoned dependencies later. This curat...
Oct 13, 2026
5 min
NestJS Best Practices for 2026: A Practical Guide (Updated for NestJS 12)
NestJS 12 changed a lot of defaults. Here are the practices I'd apply to every new project today: feature modules, validation, config, error...
Oct 8, 2026
19 min
I built my own Redis clone in Python to understand how it works
I used Redis for years without knowing what happens after I type SET. So I built a small clone in Python: it speaks the Redis wire protocol,...
Oct 6, 2026
10 min
Building Production Subscriptions with Razorpay: Webhooks, Signatures, and Edge Cases
Integrating Razorpay into a modern TypeScript backend is full of undocumented landmines: flipped HMAC arguments between orders and subscript...
Oct 5, 2026
8 min
Stop Logging Out Innocent Users: Building Production Refresh Token Rotation with Token Family Revocation in Redis
Naive refresh token rotation causes race conditions that randomly log out legitimate users across multiple tabs. Learn how to architect atom...
Oct 2, 2026
12 min
How to Choose a Database in 2026: Eight Options Compared by Use Case
No database is best at everything. This guide compares eight popular ones by use case, license, current versions and trade-offs, so you can ...
Oct 1, 2026
11 min
How Netflix and Uber Build Event Driven Systems at Scale
A practical look at how Netflix and Uber run event-driven systems at huge scale: isolating failures, choosing delivery guarantees, and plann...
Sep 21, 2026
11 min
Python asyncio from Scratch
Most asyncio tutorials start with syntax. This one starts with the problem. Once you see why your program spends most of its time waiting, c...
Sep 28, 2026
4 min