Experience

Toronto, Canada

• Implemented a Stripe-based checkout flow with temporary ticket reservation and automatic expiration release, preventing overselling while recovering unpaid reserved inventory.
• Built QR-code ticket generation and staff scanner validation flows, enabling secure on-site admission checks with scan history tracking for auditability.
• Developed refund and payout workflows with Stripe Connect, payout reserves, and ledger records, supporting financial reconciliation across orders, refunds, and organizer transfers.

Toronto, Canada

• Reduced semantic search query latency by optimizing retrieval and indexing pipelines, including chunking strategies, relevance filtering, and vector search configuration.
• Improved answer accuracy by 12% on a human-evaluated benchmark by refining retrieval quality, document preprocessing, and context selection for RAG responses.
• Reduced deployment time by 80% by implementing Azure DevOps CI/CD pipelines with automated JUnit testing, achieving 90%+ test coverage across release workflows.

Remote

• Engineered performance optimizations for FAISS metadata filtering using lazy condition evaluation, achieving a 51% improvement in filter computation efficiency over the initial implementation.
• Implemented context caching for the @langchain/google-genai package by integrating Google's File and Cache Manager APIs, enabling reuse of cached inputs across Gemini model invocations to reduce redundant token processing.

JiLin, China

• Developed an executive dashboard with Streamlit, Pandas, and Spark tracking sales conversion and retention across 20k+ users, replacing manual Excel reporting and adopted by business units for weekly reviews.