Personal Index
Thanh Vo
I'm a software engineer working on backend infrastructure, distributed systems, and digital assets.
I'm currently a founding engineer at Fystack, building open-source custody and wallet infrastructure.
Most of my work is around custody, transaction systems, blockchain integrations, and the infrastructure behind moving digital assets.
Selected work
Recent writing
How transaction authorization changes when policies need to reason about users, assets, addresses, transaction amounts, smart contract calls, and historical activity.
Notes from building transaction infrastructure across Bitcoin, EVM, Solana, Stellar, and Tron — and what I've learned from implementing custody infrastructure across networks with very different account, fee, transaction, and finality models.
Locks, idempotency, transaction state, failure recovery, and the problems that appear when moving money.