about me

~15 years designing and building distributed, geospatial software systems — with a focus on anti-fraud, defense, and e-commerce in multi-national teams. Experienced across the full delivery lifecycle: architecture, development, SRE, DevOps, QA, and engineering management. Currently in Tokyo.

English — Native Japanese — B1

Default Stack

Golang Python React OpenFaaS Cloud Functions Postgres IndexedDB

Philosophy

Stuff I did

Successfully Defended Against

Fraud

  • Account Takeover
  • Credit Card Transaction Fraud & Chargebacks
  • Ecosystem Abuse — Points, Campaigns, and Cryptocurrency
  • KYC Abuse — Deepfake Audio and Video, Fake IDs, Forged Documents

Security & Incident Response

  • Zero-Day Exploitation — Log4Shell (JNDI), WannaCry, Heartbleed
  • Denial of Service Attacks
  • Massive Registration Attacks

Language Experience

Python Java C++ C C# VB.NET JavaScript PHP Clojure Ada

Ask Me About War Stories In Production

Kubernetes Cassandra memcached MySQL (InnoDB) ElasticSearch DataDog Splunk Redis etcd Glassfish Tomcat Kafka Oracle 11g JavaEE (formerly J2EE) Drupal Django Visual C++ 6 + MFC IBM WebLogic