What is Uber's Go monorepo?

A single Git repo holding 3,000+ Go microservices, handling 1,000 daily commits with smart impact analysis to avoid full rebuilds.

How did Uber fix monorepo build times?

By analyzing changed files against a service dependency graph, rebuilding only affected services — dropping times from 45+ to under 15 minutes.

Is a monorepo right for my team?

Only if you've got tooling for blast radius control; at small scale, polyrepos are safer and simpler.

🏗️ DevOps & Infrastructure

Uber's Go Monorepo Nearly Killed Productivity – And How They Barely Saved It

Picture this: one engineer's commit tanks 3,000 Uber services, delaying your ride across the city. That's the monorepo madness Uber just survived – barely.

Open Source Beat Apr 03, 2026 4 min read 30 views

Uber Go monorepo dependency graph showing blast radius from one commit

⚡ Key Takeaways

Uber's Go monorepo handles 3,000 services but nearly collapsed under 1,000 daily commits without custom fixes. 𝕏
Key fix: dependency graph analysis rebuilds only affected services, slashing times from 45 to 15 minutes. 𝕏
Warning for scalers: monorepos amplify shared risks — tool up or break. 𝕏

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Open Source Beat

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#CI/CD optimization #Uber engineering #go-programming #monorepo

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Originally reported by Dev.to

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