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Intermediate ~16 hours

CI Pipeline Speed Optimization

Take a slow CI pipeline (>20 min) and cut it to under 5 minutes. Document every optimization.

GitHub Actions or GitLab CIDockerBazel or Nx (for monorepos)

About this project

Slow CI is silent productivity loss. This project teaches the systematic optimization: identify bottlenecks (caching, parallelism, test selection), apply each fix, measure the impact. Pick an open-source project with slow CI, fork it, optimize, and submit your changes as PR.

Why build this in 2026?

Fast CI is a $100k+/year productivity win at most companies. Specialty hiring opportunity.

What you'll ship

  • Before/after timing comparison
PR with the optimizations
Writeup explaining each technique

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Skills you'll practice

cicdgithub actionsdocker