# Harry Kalodner

> Harry Kalodner is the Co-Founder and CTO of Offchain Labs, a Princeton-founded company developing Arbitrum, and holds a Ph.D. in Computer Science from Princeton...

- Canonical URL: https://iq.wiki/wiki/harry-kalodner
- Categories: People in crypto
- Tags: Founder
- Created: 2023-04-17T17:43:16.237Z
- Last updated: 2023-04-18T15:46:59.250Z
- Source: IQ.wiki — the world's largest blockchain and crypto encyclopedia (https://iq.wiki)

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**Harry Kalodner** is Co-Founder and Chief Technology Officer (CTO) at [Offchain Labs](https://iq.wiki/wiki/offchain-labs), a venture-backed and Princeton-founded company responsible for developing [Arbitrum](https://iq.wiki/wiki/arbitrum). [\[1\]](#cite-id-juqwc1m4n8e)[\[2\]](#cite-id-alxvpc8mpys)[\[3\]](#cite-id-ntm6x21u0nl)  
  
  
# Education  
  
Harry Kalodner attended Bowdoin College from 2010 - 2014 where he earned a Bachelor's degree in Computer Science, Mathematics. In 2014, Harry attended Princeton University where he studied for a Ph.D. in Computer Science and graduated in 2020. [\[2\]](#cite-id-alxvpc8mpys)  
  
# Career  
  
Harry Kalodner started his career as a Web Services Department Intern at Western New England College from 2007 - 2009. He served as a Software Development Intern at Apple from May 2012 - August 2012 and from May 2013 - August 2013. [\[2\]](#cite-id-alxvpc8mpys)  
  
## Offchain Labs  
  
Harry Koladner co-founded [Offchain Labs](https://iq.wiki/wiki/offchain-labs) alongside [Ed Felten](https://iq.wiki/wiki/ed-felten) and [Steven Goldfeder](https://iq.wiki/wiki/steven-goldfeder) in September 2018. Offchain Labs is a venture-backed company responsible for developing [Arbitrum](https://iq.wiki/wiki/arbitrum), an "Optimistic Rollup" scaling solution for [Ethereum](https://iq.wiki/wiki/ethereum). [Arbitrum](https://iq.wiki/wiki/arbitrum) development started as an academic project at Princeton University which is where the co-founders met. [\[4\]](#cite-id-svf1re2b9pr)  
![image](https://ipfs.everipedia.org/ipfs/QmfT9TTrmxrtG547tWLd5nupBTwLvbdxCQvFf8khFzCjVa)*Ed Felten, Steven Goldfeder & Harry Kalodner*  
  
While at Princeton, the three co-founders developed the [Arbitrum](https://iq.wiki/wiki/arbitrum) technology and published a paper in 2018. [Offchain](https://iq.wiki/wiki/offchain-labs) was created with a mission to scale [Ethereum](https://iq.wiki/wiki/ethereum) and bring it to the public.  
  
In April 2019, [Offchain Labs](https://iq.wiki/wiki/offchain-labs) raised 3.7 million in seed funding. The round was led by [Pantera Capital](https://iq.wiki/wiki/pantera-capital) and included participants such as Coinbase Ventures. [\[5\]](#cite-id-ie92jjeokci)  
  
In August 2021, [Offchain Labs](https://iq.wiki/wiki/offchain-labs) secured $120 million in a Series B fundraising round. The round was led by Lightspeed Venture Partners and also saw participation from crypto investors [Polychain Capital](https://iq.wiki/wiki/polychain-capital), [Pantera Capital](https://iq.wiki/wiki/pantera-capital), [Alameda Research](https://iq.wiki/wiki/alameda-research), and Mark Cuban. [\[6\]](#cite-id-ksp48hdevuc)  
  
### Arbitrum One  
  
In August 2021, [Offchain Labs](https://iq.wiki/wiki/offchain-labs) announced the release of its Arbitrum One [mainnet](https://iq.wiki/wiki/mainnet) to the public. Arbitrum One has had several projects sign up for access on its platform since its beta launch for developers in May 2021. Offchain Labs created the platform to meet the demand for [Ethereum](https://iq.wiki/wiki/ethereum) scaling solutions that do not endanger the security of the base layer. Its EVM compatibility means that projects can deploy without altering their contracts. [\[6\]](#cite-id-ksp48hdevuc)  
  
### Arbitrum Nova  
  
In August 2022, Offchain Labs introduced Arbitrum Nova as the chain designed for gaming and decentralized social applications. Arbirtrum Nova onboarded Reddit, the social media platform to build its Community Points on the chain. The deployment on Nova facilitated [Ethereum](https://iq.wiki/wiki/ethereum) developers to tap into the Reddit community. [\[7\]](#cite-id-19bzalljlz4)[\[8\]](#cite-id-fb00wlt6zuk)