Gregory Maxwell is a co-founder of Blockstream, a software platform for digital assets that uses blockchain and sidechain technologies. He serves as the company's Chief Technical Officer.
Maxwell has been a bitcoin core developer since 2011 and an active reviewer of protocol proposals related to bitcoin. He was a key architect of the two-way peg that makes sidechains possible. He has also contributed to techniques such as the homomorphic key derivation used in BIP32 and trustless privacy-preserving techniques such as CoinJoin.
A long-time free software developer, Maxwell previously worked for a number of years at the Mozilla Foundation. He is an advocate for open-source and cryptography, and was an early contributor to Wikipedia.