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Posts tagged #go

2 posts

Build logNov 13, 2026

A dispatcher for delivery riders: one routing problem a minute

Every minute, every open order against every rider on duty, solved as one vehicle routing problem with VROOM. How the round works, why the solver's answer is only a proposal, and why the legs are diffed instead of rebuilt.

onSystem Design posts Go posts

#dispatch
#vrp
#vroom
#routing
#mysql
#go

17 min read

Build logNov 12, 2026

A Spotify-style search over six verticals and four languages with Elasticsearch

One search box, six indexes, one round trip. How I built a multi-vertical search in Go on Elasticsearch, why it rebuilds its indexes instead of syncing them, and how I would sync them at a million documents per vertical.

onSystem Design posts Go posts

#elasticsearch
#search
#relevance
#kafka
#cdc
#go

16 min read