← Back to work

Released in January 2026 and profitable from the first month, on a maintainable delivery foundation. Development is ongoing.

Context

A new business line requiring integration of multiple rental car providers with inconsistent response formats, plus a scalable delivery foundation built from scratch.

What I did

• Built the entire site frontend from the ground up.
• Initially introduced a BFF layer to unify responses and centralise error handling; later migrated to a frontend-side transformer with a predefined contract, removing an extra network hop.
• Set up the monorepo deployment pipeline with GitHub Actions, Docker and Nginx.

Phases I owned

Tech selectionRequirementsDesignImplementationCI/CD

Team

4 people — 1 frontend (me), 1 backend, 2 PM. Frontend lead — architecture, environment setup, implementation.

Environment

Next.jsTypeScriptGitHub ActionsTurborepopnpm workspaceDockerNginxBFF

Working language

Japanese · English

Links

Live site ↗