https://www.modimeet.com/blog Engineering write-ups by Meet Modi on web internals, backend systems, and the things learned building software. en Sun, 15 Feb 2026 00:00:00 GMT https://www.modimeet.com/blog/how-ad-blockers-actually-work https://www.modimeet.com/blog/how-ad-blockers-actually-work Sun, 15 Feb 2026 00:00:00 GMT I thought ad-blockers stopped ads from downloading. Turns out half the time, they don't. The download already happened. The block is what you see. Web Browser Networking https://www.modimeet.com/blog/ml-surrogates-for-aneurysms https://www.modimeet.com/blog/ml-surrogates-for-aneurysms Sun, 08 Feb 2026 00:00:00 GMT We replaced an expensive CFD simulation with a neural network surrogate. The trick wasn't the network. It was throwing 99% of the dimensions away first. Applied ML Research Numerical Methods https://www.modimeet.com/blog/atomic-redis-counters https://www.modimeet.com/blog/atomic-redis-counters Thu, 22 Jan 2026 00:00:00 GMT I had a rate limiter. It capped most users at 100 emails per hour. A few got to send 105. The bug: INCR was atomic. My code wasn't. Redis Concurrency Backend https://www.modimeet.com/blog/why-i-queue-emails https://www.modimeet.com/blog/why-i-queue-emails Thu, 15 Jan 2026 00:00:00 GMT A 12k-row CSV taught me that sending email synchronously is a request-handling bug in disguise. Here's the rewrite that fixed it. Backend Queues Redis https://www.modimeet.com/blog/cutting-tbt-by-41-percent https://www.modimeet.com/blog/cutting-tbt-by-41-percent Mon, 10 Nov 2025 00:00:00 GMT HacktoberFest 2025. PrivGPT-Studio's docs page was sluggish on mobile. Profiling found three problems I would never have guessed from reading the code. Performance Next.js Open Source