Work · Production · jpteam / C1X Inc.

Commerce admin

A NestJS backend bootstrapped to replace a legacy PHP monolith one endpoint at a time, without breaking the frontend that depended on it.

My part: Core contributor — backend foundation
State: Shipped
Links: None public — professional work at jpteam / C1X Inc.

What I built

The NestJS backend from zero: project structure, TypeORM entities generated from the live production MySQL schema, response envelopes, and JWT auth with legacy issuer compatibility so new and old sessions coexist. Then products, orders, brands, countries and a media module with direct-to-S3 streaming uploads (60MB, MIME-checked, no disk buffering).

Decisions

Legacy-compatible response shapes, so the frontend could migrate incrementally.
Audit before migrating. Every legacy controller endpoint and data shape documented as the migration target.