Spring GDS 25th Anniversary
A logistics company that ships to 190 countries built something to ship to itself.
Monorepo
What is a monorepo?
A monorepo is a single version-controlled repository that holds many projects: multiple apps, shared libraries, infrastructure code, all in one place with one history. It is the opposite of a polyrepo setup, where each project lives in its own repository with its own versioning and release cycle.
The appeal is shared code without the friction. When a frontend, a backend, and three shared packages live together, a change that spans all of them lands in one atomic commit, with one set of tests, against one consistent version of every dependency. No publishing an internal package and waiting for downstream repos to upgrade. The cost is tooling: a naive monorepo rebuilds and retests everything on every change, so they rely on build systems like Turborepo, Nx, or Bazel that understand the dependency graph and only touch what actually changed. A company running a web app, a mobile app, and an API that all share the same types and validation logic keeps them in lockstep in a monorepo, so a change to a shared type breaks the build immediately instead of in production weeks later.
Google, Meta, and many modern product teams run monorepos. The pattern scales, but only with the right build and CI tooling underneath it.
Monorepos at Dallonses
We run monorepos on projects where multiple apps share real code, because the alternative is a slow drip of version-mismatch bugs nobody enjoys chasing. Shared types caught at build time, one pull request that touches frontend and backend together, a single source of truth for dependencies. The structure pays for itself the first time a breaking change surfaces in CI instead of in a customer's hands.
The discipline is in the tooling, not the folder layout. A monorepo without smart caching and selective builds turns every commit into a twenty-minute CI run, which teams quietly start skipping. We set up the dependency graph so pipelines only build and test what changed, which is where this work meets our CI/CD pipelines and platform standardization practice. The repo stays fast, and fast is what keeps people running the checks.
Juggling several repos that keep drifting out of sync? A monorepo might be the fix. Let's talk.
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