Tax compliance · Legal RAG

TaxMate AI

A tax-compliance assistant for Vietnamese online sellers. It answers legal questions with a citation on every claim and reconciles sales against declared revenue. Built by a team of four that Khai led.

• Led a four-person team building four cores in one monorepo: Legal RAG, Risk, Graph and quantum Optimization. Set scope, budget and releases, reviewed each core and integrated them into one product.
• Built the Risk core. It imports CSVs and reconciles sales, bank deposits and declared revenue through four versioned rules, and returns `insufficient_data` instead of a misleading score when data is missing.
• Rebuilt the legal assistant's retrieval with BM25 over Vietnamese syllable pairs, and made every claim cite only chunks that were actually retrieved. This raised document recall@5 from 32 to 52 of 56 test questions.
• Built multi-tenant auth on Supabase, and deployed dev and production on Cloud Run behind a load balancer and CDN through GitHub Actions.