Live product
Browse the public storefront and see the bilingual product experience, cart behavior and checkout surface.
Frontend demo ↗02 / Book store
Multilingual
book store.
An e-commerce and inventory platform with bilingual content, safe checkout flows, payment webhooks, and production-minded stock handling.
01Project snapshot
0%load-test errors
1.76sp95 after tuning
10duplicate webhooks handled
Checkout that
stays calm.
The platform supports English and Vietnamese content, hierarchical categories, guest and user carts, and JWT-based cart merging after login. Checkout work is split into safe jobs so a slow external step does not take down the whole flow.
Redis Lua scripts provide atomic stock reservation, while BullMQ compensating transactions and SePay idempotency keys make retries safe. k6 testing at 200 VUs reduced errors from 27% to 0% and p95 latency from 7.05s to 1.76s.
02What to review
Backend proof
NestJS API, Prisma schema, workers, tests and deployment files from the production branch.
Backend repository ↗Performance evidence
Load tests, webhook idempotency checks, API contract and the before/after performance notes.
Test notes ↗03Stack