Feb 24 · 7 min read · The first time I ran a system design interview, I walked out thinking we'd nailed it. The candidate drew boxes, mentioned load balancers and caches, and sounded like they'd read the same blog posts I
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Jan 17 · 6 min read · This article is not a step-by-step solution. It’s a record of the assumptions I had, the gaps I discovered, and the details I didn’t fully understand until I tried to design a URL shortener myself. 1. Solved: 2026-01-15 2. Reference Solution https...
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Dec 6, 2025 · 5 min read · You come to the room. The interviewer is smiling and after a short chat, they put the sentence which immediately changes your brain to system-design mode… So… how would you design a scalable system for ____ ? You have the marker. The board is empty. ...
Join discussionDec 3, 2025 · 10 min read · Introduction the unexpected challenge of Cache Invalidation Hi all, a few months ago, I was working on an internal analytics platform we built for our operations team. It wasn’t a flashy consumer product or a major internal tool, just a simple dashbo...
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Nov 30, 2025 · 5 min read · The way money is transferred in India has fundamentally changed over the last decade. From complex forms and waiting hours for transfers, we’ve moved to instant, seamless transactions powered by a revolutionary system: the Unified Payments Interface ...
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