Zach Brock

Co-Founder & CEO

Before starting Common Networks, he was employee number 23 at Square. He spent 5 years there leading engineering teams working on Square’s biggest and riskiest endeavors. He was responsible for Product Engineering, started and led the International and Growth teams, and was the overall engineering lead for the first EMV/Chip Card Reader. Zach has a B.S. in Electrical and Computer Engineering from Olin College in Needham, MA.

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Mark Jen

Co-Founder & CTO

Immediately prior to starting Common Networks, Mark worked at Square where he helped launch Square in Japan, and then started and led the developer platform team. Mark has a long track record of building and managing high-performance engineering and product teams; he was the VP of Engineering and the first employee at Airtime, served as the Director of Engineering at Tagged / Ifwe, and led the Product Management team at Plaxo. Mark started his career at IBM and Microsoft. He is an inventor on 6 issued patents and has multiple pending. Mark graduated from the University of Michigan with a B.S.E. in Computer Engineering.

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Grace Chen

Co-Founder & CPO

Grace was previously at Square, where she was the Director of Product on the flagship Square Register product and managed a team of 70+ engineers, product managers, and designers. She also led teams responsible for the launches of Square Japan and Australia, Square Invoices, new Square card readers, Instant Deposits, and numerous retail, restaurants, and services features.

Before Square, Grace was at Google where she managed the Offers product and worked on Sales Strategy and Operations. She started her career as a Systems Engineer at NASA’s Jet Propulsion Lab. Grace has a BS in Management Science and Engineering from Stanford University.

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Jessica Shalek

Co-Founder & COO

Before Common Networks, Jessica was the Head of Business Development and the developer platform Product Lead at Square. She was responsible for all product partnerships, growing Square from 0 partnerships to 30+ in 2.5 years. As product lead for Square’s developer platform she defined, product managed, and launched Square’s public API and developer tools.

Prior to Square, Jessica worked at Morgan Stanley technology investment banking for 6 years specializing in IPOs. Jessica graduated magna cum laude from Barnard College and Columbia University with a BA in Economics.

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General Catalyst Team


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