Hey, I'm Kien Nguyen

Lead Software Engineer. 14+ years in software, 8+ in fintech: payments, FX and authorization. Writing about distributed systems, micro-frontends and design systems. Amateur photographer.

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Photography

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Featured projects

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Transaction Monitoring System

Real-time rule engine that watches every money movement at Xendit and raises alerts for compliance review.

Golang

Kafka

Cassandra

PostgresSQL

CEL

React

Typescript

Auth Platform

Fine-grained authorization platform on OpenFGA that every Xendit product API and the merchant dashboard depend on.

Golang

OpenFGA

React

Echo

PostgresSQL

Redis

Kafka

Xendit's Regional Dashboard

Frontend for Xendit's cross-border expansion: 5 products shipped in new markets in under 6 months.

React

Typescript

Module Federation

Live

Xendit's Merchant Dashboard

Multi-brand fintech dashboard built from 14 micro-frontends and the BFF gateways behind it.

React.js

javascript

node.js

webpack

micro-frontend

module federation

Live