by East River Source Control
East River Source Control has appointed Martin von Zweigbergk, creator of the Jujutsu version control system, as chief technology officer, to lead engineering on the company’s next generation version control platforms.
von Zweigbergk began Jujutsu as a side project in late 2019 and turned it into his full-time work at Google. The project has more than 30,000 stars on GitHub and ships under the Apache 2.0 license.
Before Jujutsu, he worked on Fig, the Mercurial client that gave Google engineers a distributed workflow on top of Piper, the monorepo holding most of the company’s code. He also contributed to Git, which according to the 2022 Stack Overflow developer survey, 96% of developers use professionally.
The hard problems many engineering teams are just beginning to face are ones he’s already been working on for over a decade. Having Martin lead our engineering affords ERSC a wholly different level of technical capability as an organization.
— Benjamin Brittain
The company is building tools to help organizations manage the exponentially increasing needs of their source code management and collaboration tools brought about by the way AI is re-shaping the software industry. ERSC Storage will be entering private beta later this month.
von Zweigbergk will continue to be a core maintainer of JJ as an open source project under the Apache 2.0 license.
Jujutsu improves the part of version control that sits on your laptop. But the remote server is still Git, which has a ceiling that comes fast for products at scale. We think the storage layer has to change to match the model, and that work can be better supported by a company than an open source project.
— Martin von Zweigbergk
East River Source Control is building the next generation of version control platforms for humans and machines. The company launched in 2025, backed by Amplify Partners. For more information, visit ersc.io.
©2026 East River Source Control.