Migrating a live product to a monorepo taught me more than any tutorial did A few months back I i...Migrating a live product to a monorepo taught me more than any tutorial did A few months back I i...
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Migrating a live product to a monorepo taught me more than any tutorial did
A few months back I inherited a codebase where the web app, mobile app, and backend all lived in separate repos separate configs, separate CI pipelines, separate everything. Every shared type or util got copy-pasted (and drifted) across all three.
We moved it into a Turborepo monorepo. Here's what actually mattered, in order:
Shared types first, shared UI later. The moment our API types and mobile types came from one source, an entire category of "why is prod broken" bugs disappeared.
CI pipeline changes hurt more than code changes. Rebuilding GitLab CI to only test/build what actually changed (not the whole repo every time) saved us more engineering hours than any refactor did.
Docker + monorepo is a trap if you do it lazily. Getting image builds scoped to the right package instead of shipping the whole workspace was the difference between a 40-second build and a 6-minute one.
None of this shows up in a portfolio screenshot. But it's the stuff that actually separates "can build features" from "can own a system."
Curious what others have run into , anyone else made this jump from polyrepo to monorepo, and did it actually pay off for your team?
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