John P. Kelleher

John P. Kelleher

  • • Founder of Level K
  • • 10+ years of software development experience, with expertise in blockchain and web development
  • • Writer for Investopedia


John is a blockchain software architect and founder of Level K. He has worked as a software engineer for over a decade and in the blockchain industry for several years. Level K has expertise in technical architecture, smart contract development, and smart contract auditing and is based in the United States. Level K specializes in decentralized governance and scalability solutions for blockchain, and has worked with over a dozen clients.


John earned his bachelor's degree in applied and engineering physics from Cornell University.

Quote from John

"I enjoy digging into a subject and breaking down what I discover."

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Investopedia and Dotdash

Investopedia helps you understand complex financial concepts, learn and improve your investing skills, and learn how to manage your money. Whether you’re in a classroom, a boardroom or your living room, our editors and network of financial advisors and experts have answered your questions and proudly earned your trust since 1999. Investopedia is part of Dotdash, a collection of some of the web’s largest and most trusted digital media brands.

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