EF Education First · 2023 – present
The platform behind ef.com
Turning slow, risky releases into a daily routine across 60+ markets.
45 → 15minutes per CI run for the 17 frontends behind ef.com, with coverage up from ~30% to 85%.
The project
EF’s global homepage and the consumer brand surfaces around it, released daily to 60+ markets from a shared delivery platform.
- Role
- Senior Frontend Engineer · EF Education First
- Stack
- Next.js
- TypeScript
- GitHub Actions
- Jest
- React Testing Library
The problem
Seventeen production frontends shared one CI/CD pipeline that took 45 minutes, and test coverage sat around 30%. Slow, risky releases across 60+ markets.
What I did
- Took ownership of the shared CI/CD platform behind all seventeen frontends.
- Parallelised builds and removed repeated package installs, bringing a pipeline run from 45 minutes to 15.
- Introduced structured testing with Jest and React Testing Library and made it part of every pull request.
- Negotiated API contracts with backend teams for the multi-region applications, and mentored engineers through review.
What changed
Daily multi-region releases became routine: pipelines run in a third of the time, coverage rose to 85%, and production incidents fell by about 40%.
Rebuilt the shared CI/CD pipeline that ships 17 production front-end apps.
Brought Jest + React Testing Library in and made tests part of every PR.
A downstream result of the coverage work and faster, safer rollbacks.
All of it at the scale of 3.4M monthly active users, 57 international markets and 17 production apps deployed daily.
