ZEHENG LIN
🔒zehenglin.com/projects

LiveDoc AI

Loblaw Digital

Architected and built an end-to-end RAG-based knowledge platform using FastAPI and a local vector database, enabling real-time document retrieval and LLM-powered responses.

FastAPIPythonRAGVector DatabaseLLM

FastPass for All

Loblaw Digital

Developed an event-driven service using Java 21, Spring Boot, and GCP Pub/Sub to manage customer access experiences. Resulted in a 130% increase in engagement within three months.

Java 21Spring BootGCP Pub/SubEvent-Driven

PCH WEB

Loblaw Digital

Utilized Next.js SSR to reduce application run time and combined Contentful CMS and GraphQL query fetch to consume content data without developer involvement. Used Redis to achieve caching layout, reducing total API calls to speed up the application.

Next.jsSSRContentful CMSGraphQLRedis