Jeff Garzik is a veteran software engineer and open-source developer who co-founded Bloq and contributed to both the Bitcoin Core codebase and the early Linux kernel. Jeff Garzik's Twitter Score is 344 out of 1000 (an Excellent rating) as of July 2026, ranking #864 (top 0.5%) among 389,587 tracked accounts.
Jeff Garzik previously worked at BitPay, where, per Wired, he was described as a prominent software engineer helping shape the open-source software driving Bitcoin. He was also formerly affiliated with Bitcoin Core, contributing to its development alongside his earlier Linux kernel work. In 2013, Wired reported that Garzik proposed launching a Bitcoin node on a CubeSat-style satellite to improve network resilience against Sybil attacks, and that he had raised more than 37 bitcoins toward a project estimated to cost roughly $2 million.
Jeff Garzik was formerly affiliated with the SegWit2x scaling effort, leading the BTC1 implementation; the planned hard fork was suspended in November 2017 after failing to reach full consensus. He was also among the developers and companies that supported the Bitcoin Classic scaling proposal, which ceased code support in November 2017. Jeff Garzik currently works at Hemi as a network plumber. Jeff Garzik has posted 67,331 times and has been mentioned by 608 accounts a total of 2,841 times.
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The accounts that follow Jeff Garzik include 1,104 founders, 264 angel investors, 403 influencers and 56 VCs, among them Balaji, Brian Armstrong, Chris Dixon, CZ BNB, Erik Voorhees and Marc Andreessen.