Hi, I'm Jun.

I'm a Senior Cloud Infrastructure Engineer working across AWS and GCP — FinOps, SRE, and CI/CD. I've delivered 30–40% cloud cost reductions, report infrastructure work to the C-suite in business terms, and I'm the sole inventor of a 0-RTT VPN handshake (USPTO pending).

This site is where I keep my engineering notes (English and 日本語) and my résumé.