A full-time Bitcoin Core contributor,sponsored by Btrust and 2140, with a background in Computer Science from Modibbo Adama University in Nigeria. Since March 2023, he has focused on fee rate estimation, the mempool component, and other core areas of the bitcoin node software. In 2024, he interned at Chaincode Labs.
Alongside his technical contributions, he mentors new developers through Btrust Builders and Summer of Bitcoin, and occasionally hosts the Bitcoin Core PR Review Club.

Writer & Builder.

Aleksandar is the Author of the best selling “UnCommunist Manifesto” and the "Bushido of Bitcoin”. He's the co founder of Satlantis: the platform for IRL communities and events.

Arjen works on Nostr-based tech that removes middlemen.

• TollGate
• FIPS
• NoDNS
• Loom

I'm an advocate for Bitcoin privacy, education, and outreach. Previous talks have ranged from intro to elliptic curves, to hashrate accounting for on-chain privacy, and time tracking for lightning invoices. For several years I led the NextGen village at TABConf, creating fun, hands-on family-friendly learning spaces. I'm trained as a plasma physicist (PhD), and I spent six years at NASA building data standards for space weather models and orbit predictions.

Ben Arc has been actively building and educating in Bitcoin since 2014. He is the creator of LNbits, a widely used wallet and accounts system with a rich extension ecosystem, as well as dozens of hardware projects.
His focus has always been on developing tools for the parallel economy that are affordable and accessible, particularly in developing regions. Along the way, he contributed to the development of Nostr, helping write some of the first NIPs, building the first Nostr Twitter client, and now maintaining nostr.com and nostr.org.

.

Working on LNbits, building open-source software and hardware for Bitcoin, Lightning and Nostr, with a focus on self-sovereignty, practical payments and freedom technology.

Brian Hirschfield is the author of Bitcoin for Institutions and the founder of the Magic Internet Math Academy, making rigorous mathematics accessible to the Bitcoin community. As an actuary and quant, Brian brings nearly three decades of institutional experience to his work at the intersection of finance, mathematics, and Bitcoin.

Brian is on a mission to bridge the gap between institutional rigor and individual sovereignty. His conviction is simple and uncompromising: if you don't know the math, you're a second-class citizen.in Bitcoin.

Chris began his career as a materials scientist and manufacturing consultant in Germany and China before discovering his greatest passion: Bitcoin. As co-founder and CEO of seedor.io & bitsurance.io, he is a central figure in the German Bitcoin scene, particularly in the areas of custody, inheritance, and insurance of Bitcoin.

.

Bitcoin Fungineer

Daniel Steigerwald is a programmer, speaker, and the creator of Evolu, an open-source local-first platform focused on privacy, resilience, and user ownership. He writes and speaks about software architecture, ownership, and the future of software that keeps users in control of their data.

Jack of all traits, master of some at Synonym. Mostly engineering.

Desi Rexach is founder of Microcosma Studio, at the intersection of film, narrative strategy, and AI storytelling. Based in Puerto Rico with seven years in Bitcoin, she co-hosts The Bitcoin Marketing Podcast, spoke at Africa Bitcoin Conference, and runs Microcosma StoryLab, developing AI storytelling infrastructure for organizations, individuals and communities. She contributes to the Bitcoin Design Community’s “Between Us” project. Her work centers narrative sovereignty: communities should own their stories the way Bitcoin lets them own their money.

Erik Hersman is co-founder of Gridless, pioneering decentralized energy through bitcoin mining to electrify off-grid communities across Africa. With renewable-powered sites in Kenya, Malawi, and Zambia, Gridless monetizes excess energy to build a sustainable path to rural electrification for 600 million unconnected people.

He also founded Node, a Nairobi campus for AI, energy, and freedom tech, hosting a GPU cluster, solar generation, and a community building sovereign infrastructure. A two-decade builder, he co-founded Ushahidi, iHub, and BRCK.

Founder @ ZEUS

Software Developer @ Electrum Wallet

Francesco advocates for liberty through Bitcoin freedom technologies and business innovation. As former leader of BitPolito at the Polytechnic of Turin, he drove Bitcoin education and open-source development, connecting students to the industry. He serves on the advisory board for the university's Bitcoin Research Observatory, helping establish Turin as an international Bitcoin hotspot.

Dedicated to personal safety, he is now Project Manager at Gart, delivering safety tools and awareness to the global Bitcoin community.

Founder of BULLBITCOIN.COM

Hynek is an economist, libertarian, free education advocate, former music teacher and organizer of voluntary family retreats. He is interested in bitcoin adoption, scaling, lightning network, privacy, pay via coinjoin, and other related topics.

Organizer of Bitcoin in Pusan, a local Bitcoin meetup community in Busan, South Korea.
Building Zappi — a Cashu-based wallet and services aimed at everyday users.
Passionate about open source and contributing back to the community.

Jordi is the Head of Growth at Satlantis.io, the bitcoin-native events app built using Nostr & Bitcoin. A former airline pilot turned entrepreneur, Jordi co-organizes the Barcelona Bitcoin community, the most vibrant community in Spain and helps other event organizers launch, grow and monetize their communities through IRL events.

Juraj is an educator, book author, coder, cryptoanarchist. He helps people turn off statism in their own heads and disconnect their brains from the hierarchies of the world. He is a co-founder of Paralelná Polis, several companies and author of the books Cryptocurrencies - Hack your way to a better life, cypherpunk novel Tamers of Entropy. Enjoyer of volatility, swimmer in uncertainty.

Kgothatso Ngako, is a catalyst aiming to accelerate the adoption of Bitcoin across the African continent. He has founded both exonumia.africa, project translating Bitcoin literature into African languages, and machankura.com, service that allows people to send and receive Bitcoin even without an internet connected device, through USSD and other text based interfaces.

https://x.com/440UrPp
https://x.com/Machankura8333

My passion is to build solutions that help empower others to reclaim their sovereignty, in a world that moves to eradicate it. Almost all my work revolves around Bitcoin. It's simply the greatest technology that I can work on to provide the most meaningful impact. As the world around us tightens its grip on our freedoms, Bitcoin provides us a way to reclaim our financial freedom and fight back.

Lea is a co-founder of Vexl, a mobile app that facilitates peer-to-peer bitcoin trading without the need for KYC. She is passionate about privacy and security in the digital world and is an active member of the local cypherpunk community.

Bitcoin developer and creator of Coconut Wallet(www.coconut.onl).
CEO of NonceLab(www.noncelab.com), a Bitcoin-only company.
Teaching the Bitcoin protocol at a university,
and running Bitcoin Center Seoul(www.bitcoincenterseoul.com).

Programmer, Bitcoiner, voluntaryist, co-maintainer of rust-bitcoin, co-founder of Paralelna Polis Bratislava

Martin (from Estonia) has been building open source things that deal with hardware and/or key management since last century. If you use smart cards on an open source operating system, there is probably a few lines of code in the execution path that were written by him.

Matthew Vuk is a protocol researcher and developer at Second, working on Bark - an open-source implementation of the Ark protocol. Matthew works with a focus on developer tooling, technical communications, and bringing self-custodial Bitcoin payments to a wide audience.

Cypherpunk

Previously Rusty Bitcoin dev turned Project Manager at Coinswap.

Nicholas Anthony is a policy analyst at the Cato Institute’s Center for Monetary and Financial Alternatives, a fellow at the Human Rights Foundation (HRF), and a member of the Economic Inclusion Group’s Advisory Board. Anthony’s research covers a wide range of topics within the field of monetary and financial economics, including central bank digital currency (CBDC), financial privacy, cryptocurrency, and the use of money in society. Anthony is the author of Digital Currency or Digital Control? and maintains the HRF CBDC Tracker.

Nick works on peer-to-peer cash security at Frostsnap. He maintains utxo.club.

Freedom tech dev and bitcoin maxi -- bitcoin, lightning, nostr, cashu. You can opt out!

Founder of RITREK.com

Side Projects: https://niot.space , https://ln2.email

Cryptography advocate since the 1990s, co-founder of Cryptohippie, author of the Free-Man's Perspective newsletter, etc.

Paulo Sacramento is a Germany-based UX designer and researcher working at the intersection of privacy, usability, and Bitcoin. He has contributed to the Bitcoin design community with support from the Human Rights Foundation, and his work focuses on turning complex systems into experiences people can actually trust.

Pavol Rusnak is a pioneering cypherpunk and co-founder of SatoshiLabs, the company behind the world-renowned Trezor hardware wallet. In addition to his unrelenting work in the Bitcoin space, Pavol is also an avid supporter of open-source software and hardware, believing that they are essential tools for protecting the power and independence of individuals.

Security researcher and teacher at Masaryk University, interested in the extent of real-world usage and the internal properties of different CoinJoin designs - in addition to the analysis of the security of cryptographic hardware and software implementations for over 20 years.

Philipp is a developer and co-founder of Lendasat. Since 2018 he has been building non-custodial Bitcoin infrastructure: peer-to-peer derivatives on DLC channels (10101.finance), cross-chain atomic swaps across Lightning and Arkade, and contributing to the Arkade Rust library. He has a long obsession with making Bitcoin Script do more than it can today.

Co-Founder & CTO at Utexo

Creator of BitVM and ShieldedCSV. PhD candidate at Stanford focusing on improving scalability, privacy, and usability of Bitcoin payments.

Firmware developer @ Trezor.

President Specter Association | German EINUNDZWANZIG Bitcoin Tutorial Guy | Making Specter Hardware Wallets easier available with ClavaStack

Let's get yourself a Hardware Wallet the Cypherpunk way:
Verify yourself
Flash yourself.
Assemble yourself

Shadrach is working with Archipelago Foundation Trust to guide and nurture individual freedom tech projects that align with our core values when creating home servers and freedom tech software. The goal is to use anonymous funding to empower innovators and communities to develop and implement technologies that promote personal freedom, protect privacy, and resist censorship.

Started accepting Bitcoin for faxes in 2015, now offering real-world postcards for Bitcoin.

Bitcoin dev in 2009-2011, Nostr dev from 2022-

Sjors Provoost is a Dutch software developer and the author of “Bitcoin: A Work In Progress”. He has been working in the Bitcoin industry since 2014 and became a Bitcoin Core contributor in 2017. He is a co-host on the podcast “Bitcoin, Explained”, in which he, together with Aaron van Wirdum, explains the latest technical developments on Bitcoin.

Electrum founder

Sound money nerd since discovering mises.org 20
years ago. Former goldbug, Bitcoin-only since
2018. Launched Satsback.com in 2020 - helped
thousands of Bitcoiners stack over $1M in free
sats while shopping online. Lightning-only
payouts from day one. More interested in
Bitcoin as freedom money than treasury reserve
companies. Now building wallet-linked offers:
merchant-funded instant satsback at any BTCPay
merchant, on open protocols, without banks or
surveillance. The incentive layer Bitcoin
payments are missing.

Tony Klausing is a technology leader who led development of JP Morgan’s digital assets network, delivering large-scale trading infrastructure for tokenized financial assets and stablecoins. He now builds open-source wallets and peer-to-peer derivatives systems on the Bitcoin Lightning Network. His work has been supported by the Open Sats Initiative and the Human Rights Foundation.

Veronika is a Bitcoin researcher, educator, and advocate focused on Bitcoin layer-2 protocols and scaling technologies. Her work examines their trade-offs, incentives, and security models through a mathematical and systems-oriented lens.

LNbits Contributor

I am dedicated to building a future where intelligence is a permissionless and private utility. By leveraging the decentralized power of Nostr and the privacy of Cashu, My work focuses on removing the gatekeepers of innovation, ensuring that AI remains accessible, censorship-resistant, and entirely accountless. I believe that in the age of automation, financial and computational sovereignty are the ultimate tools for human freedom.

Aeon is the creator of the Ibis Wallet and Mempal, as well as the maintainer of censorshipresistant.com. He possesses a deep understanding of Bitcoin's core security model and the underlying economic incentives that make the network robust and sustainable.

He has delivered talks at several Bitcoin conferences, including Bitcoin 2025, B4E, and Bitcoin Jungle.

Freedom maximalist and cypherpunk founder on a mission to build the tools for a better future.

I wear many hats.
Building, Designing, Organizing, and Instigating on Nostr, Lightning, Bitcoin

I’m a Bitcoin builder focused on infrastructure, liquidity, and the next generation of financial markets on Bitcoin. My work sits at the intersection of protocol design, developer tooling, and real-world adoption, with a focus on making trust-less systems practical and scalable. I’m currently building KaleidoSwap, a protocol for atomic, cross-layer trading across Bitcoin L2s. I care about open systems, strong incentives, and creating products that bring new users and capital into the Bitcoin ecosystem.

.

Founder of Zapstore

Bleskomat co-founder - Developer at Trezor Connect

niftynei is protocol engineer and maker who lives in Texas. she loves bringing bitcoiners together to share their work through the bitcoin++ conference series, contributing to open source, and contributing to building the world's best protocol school at Base58.