Lead author of the free Learning Bitcoin from the Command Line, the free #SmartCustody book on protecting your digital assets, and the SSL/TLS and Decentralized Identifier (DID) international standards. Executive Director/Principal Architect of Blockchain Commons and maintainer of many open source and blockchain infrastucture projects.
I’m a Bitcoin Core full time developer and maintainer. I discovered Bitcoin in 2011. My first Bitcoin Core contribution goes back [… more] to 2013. In total, I contributed over 30’000 lines of code in over 500 commits (at least twice as much was written but never made it to the master branch). I’m currently working on BIP324 - a p2p transport layer encryption as well as on a SPV mode for Bitcoin Core. Around 50% of my spent time goes into maintaining Bitcoin Core (reviewing, testing, commenting). I run bitcoinbuilds.org as well as the nightly gitian builds
I’m contributing to several free software projects, building the tools I want to use in order to defend my liberties. As these [… more] weapons of cyberspace are fundamentally non-scarce, I share my work free for anyone to use. My focus is on creating a second realm with a sound monetary economy in which sovereign individuals can pursue their entrepreneurial action.
Bitcoin Accessibility for the VISUALLY IMPAIRED and other special use cases • If you can donate a Braille Display please contact me directly!
Co-creator of the Bleskomat next generation Bitcoin ATM hardware project. Created the PayNoWay double-spend app. Running bitcoin nodes, lightning nodes, and [… more] Electrum servers. Created and maintain lnurl-node, passport-lnurl-auth, and other lnurl-related open-source projects.
My focus is improving bitcoin privacy. Right now I’m developing a CoinSwap implemention, aiming to massively improve bitcoin’s privacy and fungibility beyond [… more] anything seen before. I invented JoinMarket, the first widely-used Equal-Output CoinJoin implementation. I also focus on education and writing for the bitcoin wiki including the extensive Privacy wiki page. I also created Electrum Personal Server, aiming to be the easiest and most-efficent way to connect your Electrum wallet to your own full node, and in this way improving the user’s privacy and security.
I’ve been contributing to Bitcoin Core on a part-time basis since mid 2017. Most of my time is spent on reviewing [… more] and testing work by others, but I also created my own pull requests. Bitcoin ACKs provides a nice overview of my activity on the repo.Donate to Sjors
LN Offer (copy BOLT12 code)
I’m a regular contributor to Bitcoin Core since August 2019. Mainly focused on reviewing PRs and improving code quality by adding/improving [… more] tests, clarifying documentation and various refactorings. Interested on second-layer solutions as well – started contributing to c-lightning in May 2020.