About usWe envision a world of mainstream blockchain adoption.

Team Value

We believe in people, most importantly, we value our people. We know people build vision, create reality, assimilate teamwork that lead to results. We believe in empowering others by listening, observing, delegating and responding. By helping others, we help ourselves. Below are Sigmachain’s core values that represent our leadership, future vision and company spirit:

  • Grow our business in a way that improves other businesses.
  • Be open, accessible, honest and handy to others.
  • Demonstrate innovation through experimentation.
  • Embrace constant desire for improvement.
  • Service always matters.
  • Focus on building value, be entrepreneurial.
  • Be authentic.


Create a decentralized
Internet that is fast, friendly
and safe for everyone.

Jinyoung Kwak

Jinyoung Kwak CEO / CTO

Having a Masters degree in Computer Sciences from Griffith University, he worked as a software engineer and was among the developers of Cyrword, the first social network in Korea. Late on, he worked at Saycupid.com as CTO and was appointed an Adjunct Professor in the Department of Game Technology at the Korea Polytechnic University. He is regarded as a social network IT expert in solution (DB) Analysis & Design. Since 2015, he has been developing technologies related to SNS service based on distributed network and blockchain. He is the founder and CEO of Sigmachain and now is also serving as the CEO of Futurepia. In recognition of his services, he won the Blockchain Innovation Award at the Global Economic and Cultural Development Forum, Korea in 2018.

Dennis Oh

Daniel ParkEVP (Executive Vice President)

As the head of Sigmachain's global business department, he is actively building win-win partnerships and discovering new business models. In 1995, he guided Joongang Ilbo (a leading Korean newspaper) in launching Korea's first online news service. In 2003, as the Executive Vice President of Sales/MKT at Overture (Yahoo), he pioneered their search advertising market. In 2008, he served as the Director of Nate, an Internet search service at SK Communications. In 2016, as the Executive Director of the eCommerce team at Samsung Electronics (2016), he was in charge of planning, development, and partnerships for Samsung Pay. Additionally, he oversaw the contents and services for Samsung Electronics’ Galaxy phones, including the digital advertising platform ADHub, eBook, eLearning, and Samsung Wallet.

Dennis Oh

Dennis OhCOO (Chief operation officer)

Having a bachelor's, master's and doctorate degree in Industrial Engineering from KAIST, he has a history of conducting dozens of successful mergers and acquisitions and have consulted more than 2000 enterprises. He was the representative director of Saving Bank and Nexus Investment Company and was the CFO of Modia and Netmarble as he helped them to be listed on KOSDAQ. He has the planning ability to develop business models and can help towards its horizontal and vertical expansion. Within Sigmachain, he has developed various blockchain business models and coin ecosystems.

Yongjun Hyung

Jangjun YunCRO (Chief revenue officer)

Jangjun Yun is the Sigmachain CMO, CEO of Doobe Co. Ltd., and Technical Adviser for Korea Software Industry Association. He was part of Shinhan Bank’s smart task force, where he gained extensive experience in building personal information management systems based on the blockchain. In addition, he has built a video evidence analysis system based on AI for the Police Agency. Jangjun was part of the team that participated in making of Big Data POC production center while working along with Google and LG Display. Moreover, he has built the Hyundai and Kia Motors g-CRM / GVOCM.

Dongyoon Shin

Dongyoon ShinCSO (Chief strategy officer)

As an expert in business model commercialization, marketing and consulting, he has conducted marketing and web consulting services for 30 major companies specialized in internet such as Joins.com, Naver, Empas, etc. He also worked as a representative expert in tnternet field at Foxnet, founded online vaccine company Everyzone and led the company to the top of the industry. Also co-founded Kuku Communications Co., Ltd., secured the largest number of customers in the shortest time through the automatic address book “KukuBox” service. He served as the Chief Marketer at NHN Co., Ltd. He is currently serving as a marketing, distribution advisory board of the Rural Development Administration and also an advisory board member of the Bucheon Smart City Challenge Project.