@deveshparmar

How a Logging Endpoint Took Down Our API Gateway

2d ago · 8 min read · The Day Logging Became a Denial-of-Service Attack The Morning Everything Broke It was a regular morning. Then alerts started firing users couldn't log in. 504 Gateway Timeout across multiple APIs. T

Diving deep into Outbox Pattern.

Jun 6 · 7 min read · The Incident Imagine this. A user initiates a ₹10,000 transfer on a fintech app. The payment service processes it successfully. The user sees a green checkmark. Money is debited from their account. Bu

Your Kafka Pipeline Is Fine ~ Until the Flash Sale Starts

May 23 · 7 min read · A practical breakdown of what goes wrong during e-commerce price update bursts, and the patterns that fix it. Inspired by real scenarios like Big Billion Days and Amazon Great Indian Festival. Set t

The Memory Nightmare of Big Data: Why the Count-Min Sketch is Essential for Trend Tracking

Nov 1, 2025 · 2 min read · Have you ever stopped to think about how social media platforms identify what's trending in real-time? With millions of new posts and billions of hashtags every day, they're facing a massive data problem. The simple solution of using a hash map to co...

System Design Concepts: A Beginner’s Guide to Building Scalable Systems

Sep 4, 2025 · 3 min read · Every day, billions of people use applications like Instagram, YouTube, and WhatsApp. But have you ever wondered: How do these systems handle millions of requests per second without breaking down? That’s where System Design comes in. It’s the art of ...