Hanh
Vuong Sy

Enterprise platforms where a wrong field has real cost. I have shipped multi-tenant ERP backends for construction and supply-chain clients across quotation engines, bill-of-quantity calculation, procurement workflows, approval chains, and role-based access.

That means schema design that survives growth, workflow state machines with audit logging and soft-delete safety, custom formula evaluation, third-party CRM and accounting integrations, and the API contracts that let frontend teams move fast without breaking operational integrity.

Agentic workflows that do work while staying observable and controllable. I have designed RAG knowledge centres, code-generation agents with layered guardrails, and event-driven pipelines that carry signals from ingestion to action.

Execution is resilient by default: state machines for retries, fail-closed validation, semantic search over embedded documents, natural-language-to-code flows for formula repair, and clear surfaces where operators can intervene instead of guessing what the agent decided.

Market and analytics environments shaped for continuous inputs, interpretable signals, and action without losing context. I have built multi-timeframe data ingestion, order lifecycle tracking, journaling, risk surfaces, and real-time decision dashboards.

The architecture spans message queues and caching for throughput, vector storage for semantic retrieval, deterministic pipeline stages, and statistical / machine-learning exploration including RFM segmentation, clustering, and association-rule mining for customer intelligence.

Product surfaces for marketplaces and blockchain ecosystems, designed around trust, lifecycle, liquidity, and the systems behind every transaction. I have worked on wallet flows, NFT marketplaces, order matching, royalty distribution, cashback, and payment orchestration.

Backend concerns include custody patterns, event indexing, transaction reliability, and the accounting surfaces that let users and operators trace every asset movement.