Mark Phelps is a Principal Systems Engineer at Cloudflare since December 2025, following a role as Staff Software Engineer at Replicate. Mark founded and served as CEO of Flipt Software from October 2022 to December 2025 and previously worked at GitHub as a Staff Software Engineer and Senior Software Engineer from June 2019 to September 2022. Early in Mark's career, experience included a Senior Software Engineer position at CloudBees and its predecessor CodeShip, and roles at Popsugar, Validic, and Bronto Software, where responsibilities encompassed architecture design, service development, and team leadership. Mark holds a Bachelor of Science in Computer Science from Old Dominion University, graduated in 2008.
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