What caused Uber's Go monorepo to nearly break?

Exploding build times (45+ mins), massive blast radius (up to 3,000 services per commit), and a risk loop that slowed everything down.

How did Uber fix their monorepo scaling issues?

Change impact analysis via dependency graphs—rebuilds only affected services, dropping times to <15 mins.

Monorepo wins for atomic changes and velocity at 3,000+ services, but demands custom tooling like Uber's.

⚙️ DevOps & Platform Eng

Monorepo wins for atomic changes and velocity at 3,000+ services, but demands custom tooling like Uber's.

One commit. 3,000 microservices. Total chaos? Not anymore. Uber's near-death monorepo saga reveals genius engineering at planetary scale.

DevTools Feed Apr 03, 2026 3 min read

Uber's Go monorepo handles 3,000 microservices and 1,000 daily commits via precise change impact analysis. 𝕏
Build times slashed from 45+ to under 15 minutes by rebuilding only affected services. 𝕏
Monorepos scale massively with smart deps graphing—foreshadowing AI platform needs. 𝕏

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#CI scaling #Go monorepo #Uber monorepo #blast radius

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Originally reported by dev.to