About

Filippo Valsorda is a cryptography engineer, professional open-source maintainer, and founder of Geomys, an organization that supports the sustainable maintenance of critical Go projects.

He has maintained the Go cryptography standard library since 2018. He previously led the Go Security team at Google and worked on Cloudflare’s Cryptography team, contributing to projects including TLS 1.3 and the Go Checksum Database. He is also the creator or maintainer of widely used tools such as age and mkcert.

On words.filippo.io, he writes clear, practical articles about applied cryptography, Go security, post-quantum cryptography, open-source maintenance, and the engineering decisions behind secure software.