Browse ~41 posts
Featured·System Design·Apr 18, 2026
Building a Live Cricket Streaming Platform That Doesn't Crash at Toss Time
How do you serve 15 million concurrent viewers when Virat Kohli walks to the crease? A deep dive into the control plane: pre-scaling, admission control, heartbeats, and graceful degradation.
RecentLast 30 days
Bought My Small Home at 21
A short note on what it actually means to own something before most people figure out what they want.
4 min read
i
Fraud Detection Runs Inside the Payment, Not After It
At Paytm/Razorpay/PhonePe scale, fraud is synchronous — sub-100ms feature fetch, model score, rules, and a decision before money moves.
10 min read
ii
How Payment Reconciliation Systems Actually Work
Every payment system has a reconciliation layer nobody talks about. Here's what it does, why it breaks, and how the good ones are designed.
9 min read
iiiCollege Placements Are Not a Safety Net
The placement cell will not save you. Neither will the brand on your degree. A direct take on where engineers actually find leverage.
6 min read
ivThe archive
36 pieces- Apr 2026PaymentsWhy All UPI Apps Feel the Same Speed7 min
- Apr 2026PaymentsWhy Fintech Systems Don't Use Floating-Point Numbers for Money6 min
- Mar 2026PaymentsHow BNPL Approves You in Seconds Using India's Financial Data Highway10 min
- Mar 2026System DesignWhy Your Swiggy ETA Jumps Mid-Order — The 4 ML Models Behind '35 Min Delivery'8 min
- Mar 2026System DesignHow Blinkit, Zepto & Instamart Deliver in 10 Minutes8 min
- Mar 2026PersonalThe Market Isn't Bad. You Just Stopped Evolving.5 min
- Mar 2026System DesignYour Delivery Rider's GPS Never Writes to a Database7 min
- Mar 2026PersonalI Fall Asleep in Seconds Now. Not Minutes — Seconds.4 min
- Mar 2026SecurityWhy OTPs Look the Same but Work Very Differently5 min
- Mar 2026PaymentsHow Bank Transfers Work8 min
- Mar 2026PaymentsHow UPI Payments Actually Work Under the Hood7 min
- Feb 2026BackendWhy Your Payment Backend Needs a Dedicated Real-Time Layer10 min
- Feb 2026AIAnthropic Wants to Have Its Cake and Eat Yours Too5 min
- Feb 2026PaymentsHow Food Delivery Apps Show 'Paid' Instantly8 min
- Feb 2026PersonalLouf for 20305 min
- Feb 2026PaymentsInside Payment Routing: How Razorpay Routes Your ₹100 in Milliseconds18 min
- Feb 2026System DesignHow Paytm and Google Pay Made QR Scanning Feel Instant5 min
- Feb 2026AIInside Moltbook: The First Social Network for AI Agents12 min
- Jan 2026BackendWhy YouTube Uses SSE Over WebSockets: A Cost-Effective Architecture Decision18 min
- Jan 2026BackendBuilding Classio: A Serverless Deployment Platform12 min
- Jan 2026BackendHow I Got My First Internship Implementing Prometheus & Grafana18 min
- Dec 2025System DesignWhen Multiple Tech Stacks Actually Make Sense: Lessons from PhonePe15 min
- Dec 2025System DesignWhy YouTube Live Chat Scales Without WebSockets12 min
- Dec 2025System DesignUnderstanding How the YouTube Video Pipeline Works15 min
- Dec 2025PersonalHow 2025 Taught Me to Stand on My Own Feet6 min
- Dec 2025SecurityHow React Got Hacked: The Critical Server Components Vulnerability Explained8 min
- Nov 2025SecurityHow NPM Was Hacked: The Shai-Hulud Attack Explained Simply10 min
- Nov 2025BackendWhy Cloudflare Workers AI is the Future of Serverless AI Development12 min
- Oct 2025AIThe AI Era: Let's Face the Truth6 min
- Sep 2025System DesignBuilding a Cal.com Clone for $50/Month: My System Architecture5 min
- Sep 2025BackendBuilding a Serverless Trading Platform Backend: SEBI Hackathon8 min
- Sep 2025BackendLearning Advanced Backend Engineering by Building Mini-Automation Features12 min
- Aug 2025System DesignHow I Think Unacademy's Live Class Backend Works8 min
- Jan 2025AIKimi 2: The Chinese Open-Source LLM Challenging GPT-4/512 min
- Jan 2025BackendStartDB Update: SQL Query Engine & B-Tree Indexing Now Live15 min
- Jan 2025BackendBuilding StartDB: The Future of AI-Powered Databases15 min