John Youngseok Yang, PhD (양영석)

(2021-Now) CEO & Founder of Nodeinfra(Mirny Inc.), a blockchain node-as-a-service provider. (We’re hiring - jobs@nodeinfra.com)

Blockchains

Ethereum Bounty Program, 20K Points
- I found and reported two critical consensus bugs in Ethereum. One of the bugs led to the 2020/11/11 Ethereum hard fork (News: Coindesk, Decrypt, Korean News)

Selected Publications (Full list)

Youngseok Yang, Taesoo Kim, and Byung-Gon Chun. Finding Consensus Bugs in Ethereum via Multi-transaction Differential Fuzzing. In Proceedings of the 15th Symposium on Operating Systems Design and Implementation (OSDI 2021).
Youngseok Yang, Jeongyoon Eo, Geon-Woo Kim, Joo Yeon Kim, Sanha Lee, Jangho Seo, Won Wook Song, Byung-Gon Chun. Apache Nemo: A Framework for Building Distributed Dataflow Optimization Policies. In Proceedings of the 2019 USENIX Annual Technical Conference (ATC 2019).
Youngseok Yang, Geon-Woo Kim, Won Wook Song, Yunseong Lee, Andrew Chung, Zhengping Qian, Brian Cho, Byung-Gon Chun. Pado: A Data Processing Engine for Harnessing Transient Resources in Datacenters. In Proceedings of the 12th European Conference on Computer Systems (EuroSys 2017).

Companies

2017, Google, Mountain View, Intern (Mentor: Sunghwan Ihm)
2015, Microsoft Research Asia, Beijing, Research Intern (Mentor: Zhengping Qian)
2011-2013, Ponple, Seoul, Marketing lead

Open Source

Talks

2019, ApacheCon, Las Vegas, Optimizing Big Data Pipelines with Apache Nemo (Incubating)
2019, USENIX ATC, Renton, Apache Nemo: A Framework for Building Distributed Dataflow Optimization Policies
2017, ACM EuroSys, Serbia, Pado: A Data Processing Engine for Harnessing Transient Resources in Datacenters

Others

Education

2014 - 2021, Ph.D. in Computer Science and Engineering, Seoul National University (Advisor: Byung-Gon Chun)
2009 - 2014, B.A. in Business (Minor in Computer Science and Engineering), Seoul National University