Uri Kolodny

Uri Kolodny is a Co-Founder, Board Member & Ex-CEO at StarkWare[3], the developer of the permissionless Validity-Rollup ( network operating on . Kolodny stepped down as CEO of StarkWare in January 2024. [1][2]


Uri Kolodny attended The Hebrew University of Jerusalem from 1993 to 2001 where he earned a B.Sc., in Computer Science (Magna cum Laude). In 2000, he earned an MBA at MIT Sloan School of Management. [2]


Uri Kolodny is a serial entrepreneur, who has co-founded several technology companies, among them OmniGuide (an MIT spinoff developing optical fibers for endoscopic surgery), Timna (developer of an ultrasound-based therapeutic product for the cardiovascular market), and Mondria Technologies (developer of tools for visualization of big data). [2]

Previously, Uri also served as an Entrepreneur-In-Residence (EIR) with two Israeli VC firms including Greylock & ICV. [2]

He has served as an Advisor and Angel investor in multiple companies including Certora, Mesodyne, Anthro, Aclarity, and Newmetrix. [4]


In 2018, Uri Kolodny co-founded StarkWare alongside , , and . He served as the CEO of the company until January 2024 when he stepped down due to a family health issue. [3][5]

“I remain utterly STARK-pilled, but I’m leaving the CEO post to meet the health needs of my family,” Kolodny said. [6]

“The company, and the tech stack it has built, are more advanced after six years than I could have ever dreamed. Led by Eli and the team of 150+ gigabrains, I’m positive that StarkWare will continue to push boundaries of what is possible in scaling Ethereum.”[5]

In his statement, Kolodny expressed confidence in the company’s future under leadership.

“I am sure he will lead Starkware forward with talent and devotion, to great heights,” he remarked.[6]

StarkWare Industries Ltd. is a  technology company based in Israel, focusing on developing ZK-Rollup technology and building products to solve the challenges of the network. Besides the technology infrastructure, Its main two products are StarkEx and . [3]


StarkEx is the Validium L2 scaling engine on Ethereum  that is modified (tailored) to fit specific permissioned , used for projects to deploy their ideas (mostly for trading use cases) , ImmutableX, DeversiFi, and many other partners. This Specific L2 is where most protocols are built on, generating real trading volume and conducting transactions. [7]


 is built based on STARK as the decentralized L2 Zk-rollup. The layer is responsible for executing transactions while scaling without the security sacrifice of . STARK developers can write  and run them permissionlessly on Starknet. [8]

Starknet aims to achieve secure low-cost transactions and high performance by using the STARK cryptographic proof system. Starknet contracts and the Starknet OS are written in Cairo, a custom-built and specialized programming language. [8]

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Uri Kolodny

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April 19, 2024


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