H3 | System Designhttps://system-design.devops-monk.com/tags/h3/In-depth system design tutorials — from zero to millions of users. Written for engineers who want to understand how large-scale systems actually work.en-usabhaypratap3537@gmail.com (Abhay)abhaypratap3537@gmail.com (Abhay)Sun, 06 Sep 2026 22:11:29 +0000Design a Proximity Servicehttps://system-design.devops-monk.com/2026/06/design-a-proximity-service/Thu, 04 Jun 2026 10:00:00 +0000https://system-design.devops-monk.com/2026/06/design-a-proximity-service/abhaypratap3537@gmail.com (Abhay)Case StudiesHow does 'restaurants near me' return results in under 100ms from 200 million businesses? Geohash, quadtrees, Google S2 and Uber's H3 explained from first principles — with an interactive geohash encoder you can play with, and the boundary bug that breaks the obvious implementation.Design a Proximity Service

How does 'restaurants near me' return results in under 100ms from 200 million businesses? Geohash, quadtrees, Google S2 and Uber's H3 explained from first principles — with an interactive geohash encoder you can play with, and the boundary bug that breaks the obvious implementation.

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