John Villar
Propietario at Sistemas Timitacon C.A.
Miranda State, Venezuela
Summary
👤
Senior🎓
Top SchoolJohn Villar is a seasoned software engineer and entrepreneur with 13+ years focused on open source and blockchain technologies, working with blockchain since 2011 and contributing to Counterparty as a core developer and former foundation member. As owner of Sistemas Timitacon and XCP.Host, he designs decentralised, trustless systems and a decentralized exchange engine, blending backend protocol work with full-stack wallet enhancements like segwit support. Security-focused and human-centered, he balances paranoid threat awareness with practical UX and accessibility improvements across projects. His contributions to counterparty-core include implementing MPMA and dispenser logic and shaping protocol asset/address handling, while his Counterwallet work demonstrates strong build-process and UI/flow refinement skills. A long-time Mozilla contributor and early co-founder of the RarePepe movement, he brings an unusual mix of protocol-level rigor, indie game experience, and cultural creativity—metal and synthwave fan included. Based in Miranda State, Venezuela, he holds a Computer Software Engineering degree from Universidad Simón Bolívar.
13 years of coding experience
Ingeniero en Computación, Computer Software Engineering, Ingeniero en Computación, Computer Software Engineering at Universidad Simón Bolívar
Spanish, English, Italian, German
Github Skills (21)
knockout10
javascript10
python10
bitcoin10
bitcoins10
knockoutjs10
cryptography10
blockchain10
web-development10
testing9
front-end-development9
database-design9
html9
script9
css8
Programming languages (10)
Github contributions (5)
CounterpartyXCP/counterparty-core
Sep 2017 - Feb 2021
Counterparty Protocol Reference Implementation
Role in this project:
Back-end Developer
Back-end DeveloperContributions:7 releases, 216 commits, 73 PRs in 3 years 5 months
Contributions summary:John's primary focus within the `counterpartyxcp/counterparty-core` repository involves implementing and refining the MPMA (Multi-Party Market Agreement) and dispenser functionalities, crucial components of the Counterparty protocol. They are heavily involved in protocol changes, specifically around the handling of assets and address options. The user contributes to the code by creating and modifying backend logic and adding associated test vectors, indicating a strong emphasis on protocol implementation.
ethereumblockchaincounterpartyreference-implementation
CounterpartyXCP/counterwallet
Sep 2018 - Oct 2019
Counterparty web wallet
Role in this project:Full-stack Developer
Full-stack DeveloperContributions:52 commits, 16 PRs, 34 pushes in 1 year 1 month
Contributions summary:John primarily focused on adding and improving features for the Counterparty web wallet. Their contributions included implementing segwit support, enhancing dispenser functionality, and improving accessibility. They also made changes to the build process, including generating timeago localizations and refactoring build tasks, along with general bug fixes and code improvements across multiple components. Furthermore, they modified the UI and user flows to reflect new features, such as enabling segwit features based on mainnet block activation.
web-walletcryptocurrencycounterpartywallet
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.