Matthew Zipkin found Bitcoin in 2013 and started building tools for it straight away. His best known early work is the Bitcoin Block Clock, a custom full node in a case with an artistic network visualiser attached, made to give people a reason to run a node and then learn what it was doing. That is an unusual theory of adoption and a durable one: the device is the argument.
Before joining Chaincode Labs he was a regular contributor to and project maintainer of Bcoin, a Bitcoin library written in NodeJS. He is now an engineer at Chaincode, where the team's work covers Bitcoin Core development, review, testing and maintenance.
He also takes part in the education side, including Summer of Bitcoin and Des Femmes, which sits alongside Chaincode's own programming challenges and protocol seminars for new contributors.