John Graham-Cumming
Board member at Cloudflare, and its CTO until March 2025; joined the company as a programmer in 2012. Writes at blog.jgc.org, lives in Lisbon, and wrote the open-source email filter POPFile.
John Graham-Cumming did not write this page. ppll compiled it from their own words, each linked to the source. Is this you? · Report a mistake
Where they publish
Blog blog.jgc.org His long-running personal blog: hardware, software and odd projects.
Posts at irregular intervals on hardware projects, software, history of computing and whatever he is tinkering with; the newest in the feed are from 2026. Has a feed.
Link verified 11 Oct 2026.
Blog Cloudflare Blog His posts as Cloudflare’s CTO: incidents, innovation weeks and the move to the board.
Where his Cloudflare writing lands, from incident write-ups to innovation-week openers and “Three chapters at Cloudflare”. Many posts are co-written; the feed is his author feed, not the whole blog.
Link verified 11 Oct 2026.
GitHub jgrahamc His public code: small tools, experiments and long-running projects.
His public repositories — small tools, experiments and long-running projects.
Link verified 11 Oct 2026.
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