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Blockchain development, cryptocurrency, and open-source technology by Jeff Garzik

Jeff Garzik is an early Bitcoin Core contributor and former software engineer at Red Hat. He co-founded Bloq, a blockchain infrastructure firm developing multi-chain systems and led development of the Hemi Network in 2025. Hemi’s Proof-of-Proof protocol proposes a novel interoperability model linking Bitcoin security guarantees to Layer-1 scalability across Ethereum and Cosmos ecosystems.

Garzik also founded NextCypher Productions, a Web3 media studio focused on decentralized storytelling. His advisory roles span over a decade, including BitFury, Coin Center, and various early token projects. As of 2025, Garzik remains an advocate for Bitcoin-first interoperability, citing regulatory neutrality and security anchoring as strategic priorities.

Garzik combines technical legacy with forward-thinking architecture, consistently building tools that extend Bitcoin’s role in a modular crypto landscape.

Questions emerge on EF's stake and DPRK address actions, Ser Jeff Garzik notes
  • Daria Chernytska
  • Yesterday
Questions emerge on EF's stake and DPRK address actions, Ser Jeff Garzik notes
Ser Jeff Garzik questioned whether EF has a financial or other significant stake in current developments and invited discussion about the balance between targeting addresses linked to the ...
Ser Jeff Garzik: Fintech, crypto, traditional finance, and AI convergence draws attention
  • Daria Chernytska
  • 18.10.2026
Ser Jeff Garzik: Fintech, crypto, traditional finance, and AI convergence draws attention
Ser Jeff Garzik commented that the convergence between fintech, crypto, traditional finance, and artificial intelligence continues to be notable. No additional developments or claims were ...
Random keys break HD wallet relationships, Ser Jeff Garzik notes
  • Hanna Syniavska
  • 08.10.2026
Random keys break HD wallet relationships, Ser Jeff Garzik notes
Ser Jeff Garzik explains that HD wallets consist of mathematically-related sets of keys. He adds that generating random keys independently from a random number generator disrupts this inherent ...
Ser Jeff Garzik: BTCtreasuries conference features strong speaker lineup
  • Eugene Komchuk
  • 28.09.2026
Ser Jeff Garzik: BTCtreasuries conference features strong speaker lineup
Ser Jeff Garzik praised the slate of speakers at the BTCtreasuries conference in his recent remarks. He also recommended exploring the data resources provided by the ...
Market-clearing process instead of crisis for digital assets, Ser Jeff Garzik notes
  • Hanna Syniavska
  • 05.08.2026
Market-clearing process instead of crisis for digital assets, Ser Jeff Garzik notes
Ser Jeff Garzik highlights that basic economics, particularly supply and demand, are at play in the digital asset space when the cost of creation is effectively zero. He frames the current ...
Ser Jeff Garzik: Quits Bitcoin mining after repeated monthly losses
  • Yaroslav Dmytrenko
  • 04.08.2026
Ser Jeff Garzik: Quits Bitcoin mining after repeated monthly losses
Ser Jeff Garzik announced an exit from Bitcoin mining, citing ongoing monthly losses linked to BTC mining hosting fees. The decision includes surrendering all mining equipment. Garzik ...
Dismissive custody debate common with Coldcard promoters, Ser Jeff Garzik notes
  • Jose Antonio Gastelum
  • 02.08.2026
Dismissive custody debate common with Coldcard promoters, Ser Jeff Garzik notes
Ser Jeff Garzik highlights concerns regarding promoters of Coldcard, specifically naming @gladstein, in relation to how custody conversations are addressed. He points to a commonly dismissive ...
Ser Jeff Garzik: Secure self-custody remains a challenge for everyday users
  • Yaroslav Dmytrenko
  • 31.07.2026
Ser Jeff Garzik: Secure self-custody remains a challenge for everyday users
Ser Jeff Garzik raises concerns about the challenges of secure self-custody of digital assets, especially for those in vulnerable situations such as poor Afghans. He points out that discussions ...
New DeFi bridge app focuses on autonomy and self-custody, Ser Jeff Garzik notes
  • Hanna Syniavska
  • 14.07.2026
New DeFi bridge app focuses on autonomy and self-custody, Ser Jeff Garzik notes
Ser Jeff Garzik argues that a new application should preserve the essential features of decentralized finance, including self-custody and autonomous choices over trading, borrowing, and lending. ...
Ser Jeff Garzik: Financial firms cautioned against Chicago after recent signal
  • Hlib Chabaniuk
  • 17.06.2026
Ser Jeff Garzik: Financial firms cautioned against Chicago after recent signal
Ser Jeff Garzik expresses concern over signals suggesting that financial firms should avoid Chicago. He describes this as a personal blow, noting that Bloq is based in Chicago, ...
AI tokens lack efficient real-time pricing, Ser Jeff Garzik argues
  • Yaroslav Dmytrenko
  • 22.05.2026
AI tokens lack efficient real-time pricing, Ser Jeff Garzik argues
Ser Jeff Garzik raises concerns about the current pricing of AI tokens, suggesting they are either being subsidized and underpriced or have become overpriced. He emphasizes the need for a true, ...
Ser Jeff Garzik: Crypto bears face $300 million in liquidation losses
  • Hanna Syniavska
  • 04.05.2026
Ser Jeff Garzik: Crypto bears face $300 million in liquidation losses
Ser Jeff Garzik, industry influencer, highlights that crypto market bears have suffered $300 million in liquidation losses. His statement comes as liquidation events continue to impact market ...
VUSD offers redemption and sVUSD provides yield in onchain system, Ser Jeff Garzik notes
  • Daria Chernytska
  • 30.04.2026
VUSD offers redemption and sVUSD provides yield in onchain system, Ser Jeff Garzik notes
Ser Jeff Garzik, industry influencer, presents a new three-part architecture featuring two instruments, VUSD and sVUSD. VUSD acts as a redemption instrument, described as over-collateralized, ...
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