Real People Building a Real Product

The Celsius Network will be the next generation of lending and borrowing for the cryptocurrency community. We are proud to be comprised of a team of experienced entrepreneurs who know how to take a concept from ideation to full execution on a global scale.

Executive Team


Alex Mashinsky


Alex is a serial entrepreneur and founder of seven New York City-based startups, raising more than $1 billion and exiting over $3 billion. Alex founded two of New York City’s top 10 venture-backed exits since 2000: Arbinet, with a 2004 IPO that had a market capitalization of over $750 million; and Transit Wireless, valued at $1.2 billion. Over 30 patents have been issued to Alex, relating to exchanges, VoIP protocols, messaging and communication. In fact, Alex has a foundational patent on VoIP (Voice Over Internet Protocol) technology dating back to 1994 and is now working on MoIP (Money Over Internet Protocol) technology.

Alex has received numerous awards for innovation, including being nominated twice by E&Y as entrepreneur of the year in 2002 & 2011; Crain’s 2010 Top Entrepreneur; the prestigious 2000 Albert Einstein Technology medal; and the Technology Foresight Award for Innovation (presented in Geneva at Telecom 99).

As one of the pioneers of web-based exchanges, Alex authored patents that cover aspects of the Smart Grid, ad exchanges, Twitter, Skype, App Store, Netflix streaming concept and many other popular web companies. Additionally, Arbinet’s fundraising story was featured as a case study in 2001 by Harvard Business School.

S. Daniel Leon

Founding President & COO

Daniel Leon is a business and social entrepreneur with a proven track record of growing early-stage companies and building organizations from the ground up. Daniel has co-founded and led multiple companies and not-for-profit organizations. Before Governing Dynamics, where he is a managing partner, he was CEO of Atlis Labs, a venture-backed local discovery platform powered by real-time customer referrals. Prior to that, Daniel served as CEO of Beyon3D and chairman of HereO. He was also general manager, of GroundLink, which raised more than $30 million in funding during his tenure. He started his career as vice president with the Gallup Organization. Daniel holds a degree in Economics from Brown University. He splits his time between New York and Tel Aviv.

Nuke Goldstein


Nuke is a seasoned software developer, architect, innovator, and entrepreneur in cutting-edge technologies. His career ranges from image processing and AI to IoT and blockchain. Prior to his work on the Celsius crypto assets lending and borrowing platform he designed P2P credit protocols using distributed storage and smart-contracts. Nuke was the CEO and founder of Sevenpop, a leading interactive music technology provider to hundreds of hotels and shopping centers across Israel. Nuke holds a B.Sc. in computer science from the Technion in Haifa (Israel’s most elite Institute of Technology). He also has black belts in Kempo Karate and Combat Ju-Jitsu. In addition, he has been awarded a grant by the National Science Foundation.

Keith Baumwald


Keith has spent his career as a full-stack marketer working for startups, agencies and large corporates. Before joining Celsius, he spent the past three years consulting for startups in London, Berlin and New York, primarily focused on the financial, travel and SAAS sectors. In his last role with Travelex, Keith was named Global Head of R&D where he created and developed a new division within Travelex looking at emerging technologies like the blockchain and cryptocurrency Keith discovered cryptocurrency  in 2011 and began attending meetups in New York City and Japan. This lead to him contributing to Ethereum’s crowdsale in the summer of 2014, making him our team’s oldest HODLer of Ethereum. Keith also served as a Peace Corps volunteer in Uzbekistan for two years shortly after finishing university.

Ronit Dvir Bacalu

Ms. Bacalu has has over 18 years of experience in growth companies across technology, communication real estate and financial services. Prior to joining Celsius Mrs. Bacalu served as Chief Financial Officer of Kalyx, a fully integrated real estate development company, leading multi state provider of commercial and industrial space to the highly regulated cannabis industry. Prior to that, from 2012-2015 Ms. Bacalu served as Chief Financial Officer of Sapir Organization, a leading real estate holding and development company Prior to Sapir, from 2009-2012, Ms. Bacalu was a Vice President of Finance and Chief Financial Officer of DoubleVerify and Peer39, both advancing tech companies at different stages of development. During this time, she was also an active member of the IAB (Interactive Advertising Bureau) CFO council.

Tech Team

Mališa Pušonja
Blockchain Architect Lead

Mališa has been a Front-end and Back-end Full Stack PHP Angular developer working on new features. He used the virtual environment, e.g. Puppet/ Vagrant, and continued his professional career as a Full Stack Lead Developer at Vibe Network, working on AngularJS/JQuery, Ansible, CSS/HTMLparallax sites), MySQL/MongoDB, PHP/NodeJS, RabbitMQ, and Varnish. Mališa then turned his attention towards the blockchain, where he built Lemon e-mail, the world’s first encrypted and decentralized e-mail service, using Ethereum & IPFS decentralized platforms. Mališa’s passion for Philosophy, Data Science and Engineering have helped him become a leading, international Blockchain Expert.

Stevan Koprivica
Lead Backend Engineer

Stevan is in web development for more than 20 years, from the time of, till nowadays. He witnessed <blink> and <marquee>, first browser war, cgi-bin/, PHP/FI, mSQL, dot-com boom/bubble, Javascript, Ajax, Web 2.0, frameworks, LAMP, MEAN, sql, noSQL, websockets, cloud computing, etc. A web programmer with a proven track record of architectural design, development and maintenance of web sites and services of various complexity and scale for a variety of companies and industries.  He is a full-stack developer in love with plain CSS code, who thinks VBA is the only perfect programming language and environment. His favorite technologies are php and solr.

Branislav Djuric - Lead Frontend Engineer
Branislav Djuric
Lead Frontend Engineer

Ever since he was a child, Branislav enjoyed tinkering with computers, making Computer Science an obvious career choice. He studied it at Belgrade. Honed his professional skills while working with various teams in Belgrade, Zurich, Amsterdam, Berlin and other European cities. He believes that technology and nature intertwine, creating beautiful patterns and we need only observe them to learn from them. Branislav loves fintech applications making the blockchain realm a natural fit for him. He is a fervent supporter of open source technology and focuses on in-browser applications, data visualization as well as human-computer interaction. He has successfully failed at starting 3 startups. 

Antun Debak
Product Design

A designer with over 12 years of experience. Antun’s focus is currently on digital product design, but he has experience in various fields ranging from graphic design and coding to product management and entrepreneurship. He has been on both sides, from freelancing and aiding small startups and design agencies worldwide, to working on a full product lifecycle projects with big players such as Microsoft, RealNetworks, Vodafone, Verizon and more. Antun loves giving back to the community by organizing conferences, design workshops, meetups and more. As a CPO at MVP Workshop, he’s currently building crypto community on the Balkans and leading all of our UX and product design efforts here at Celsius.

Filip Jovakaric

Proficient in all things javascript related with frequent excursions into other languages like ruby and python, he embraces new and innovating technologies in this ever-changing environment. He considers blockchain technology to be a game changer for the whole world and enjoys being part of a team that will build this future.

Djordje Stevanovic

Djordje developed a card publishing system using Java EE, HTML5, CSS3, JavaScript, Typescript, Angular 2, Redux, RxJS, React. Has has also worked on a front-end for a music distribution service (HTML5, CSS3, JavaScript, Angular) as well as maintained and upgraded an existing ERP system (Java EE, Hibernate, Spring, HTML5, CSS3, JavaScript).

Nemanja Krstonic
Blockchain R&D

Nemanja is a blockchain research & development analyst at MVP Workshop. His research is focused on structuring and analyzing types of token distribution criteria, consensus protocol, and ICO trends. He is passionate about data science, business & product development. 

Milos Jovac

Miols started as PHP developer more than three years ago. He transitioned to Android development 4 years ago. He has also been dabbling with NodeJS backend and javascript for a few years before starting to experiment with blockchain for the past year.

Core Team

Liz Rabban
VP Sales

Liz advises growth stage technology companies on a spectrum of strategic business development initiatives. For over two decades, she has consulted with founders, partners, and investors to create scalable sales and marketing structures. Prior to entering the blockchain and crypto arena, she worked with a variety of technology and BPO companies in accessibility/assistive technology, VoIP, publishing, biotech, and healthcare. She is a current Activator at SheEO, a global initiative designed to radically transform the way investors finance and support female entrepreneurs; she has served on the boards of several startup ventures. Liz has a BA in English from Barnard College, Columbia University.

Aliza Landes
Head of Sales and BD, EMEA

Aliza Landes has spent the majority of her professional career as an officer in the Israel Defense Forces, where she has served at the nexus of defense policy, communications strategy and international relations. In 2007, Aliza enlisted into the IDF Spokesperson’s Unit, where she served as a press officer and liaison to foreign media outlets. She founded the IDF’s new media department in 2009 and, as its commander, revolutionized the IDF’s public relations efforts. In 2011, Aliza was recruited to the Coordinator for Government Activities in the Territories (COGAT), which is responsible for attending to the humanitarian needs of Palestinians in the West Bank and Gaza Strip.

Ross Gottesman
Head of Sales and BD, US

Ross has nearly 15 years experience in marketing, product, and sales functions, primarily in fintech. Before joining Celsius, he held a number of product management roles in digital payments at Mastercard, which included improving transaction safety and security via a proprietary alerts and controls platform. In marketing capacities at American Express, he enhanced the value proposition of prepaid cards and was instrumental in the strategy and execution of an industry development initiative that grew B2B spending. His background also includes television, video games, blogs, real estate, and mass transit. Part of his fascination with the blockchain is its potential for financial inclusion. Ross earned his B.S. with honors from Cornell University.

Roman Krywulych
Senior Risk Manager

Roman is a finance and risk management professional, whose experience spans both credit/counterparty risk and market risk management. Prior to joining Celsius, Roman worked at Nasdaq, where he used advanced data analytics and automation tools to build out and improve Nasdaq’s consolidated risk system. The solutions Roman implemented perform credit analysis, generate alerts, and execute risk calculations in an automated fashion for Nasdaq Fixed Income (an electronic Treasuries trading platform for high-frequency traders), the OMX Nordic clearinghouse, and Nasdaq Treasury’s in-house liquidity portfolio. Roman is an avid crypto trader and has been investing/trading and attending meetups in the space since 2014. He holds a degree in Industrial and Systems Engineering from Lehigh University.

Leah Jonas
Director of Client Services

Leah is a graduate of the University of Arizona where she received a degree in Sociology and Business. Prior to joining Celsius, Leah held positions in marketing, customer service, and technology sales- in both corporate and start-up environments. It was her experiences working in start-ups (as well as reading the book Digital Gold) that helped her realize that the emerging crypto-currency market was actually a start-up industry, with tremendous opportunity. In an effort to help others understand this fast developing field, she founded the Crypto-Content Club, focusing on blockchain technology and industry developments.

Kristen Ryan
Event Coordinator

Kristen joins Celsius with a background in tech sales, nonprofit event work and small business management. As she began learning more about blockchain in early 2017, she became passionate about the technology’s humanitarian possibilities. From P2P lending to land title rights, she is eager to see the improvements blockchain technology will bring to the world! Kristen has a B.A. in Sociology from Boston College.

Ashley Harrell
Anita Motwani
West Coast Sales

Anita began her career on Wall Street first in sales then later in trading. She then moved to the Bay Area and began a career working with technology and Cleantech companies. She focused on business development, strategy, sales and fundraising efforts for startups in a variety of spaces including fintech, e-commerce, digital health, sustainable agriculture, social media, insure-tech, biotech and clean technology. Anita is a Network Advisor for the only venture capital fund that invests algorithmically called Correlation Ventures. Anita is a founding member of the Silicon Valley Blockchain Society group in the Bay Area.

Lola Scheiner
Sales Associate, EMEA

Lola has worked in few startup companies in fields of Telecommunication and web-based applications in NYC which later grew, matured and flourished to successful IPO’s. In recent years Lola has been consulting to corporations and private customers in fields of cyber technology and on ways of adopting proper business communication. She holds a B.A. in Business from the Interdisciplinary Center (IDC) and a B.Ed in English and volunteers in teaching English to underprivileged children in Israel and enjoys rock climbing.

John Arce
Head of Marketing, Asia

John is a Digital Marketing professional with over 8 years experience. He is the founder of WebGeek Philippines, a community platform for developers & startups. Previously, he worked as a marketing lead at Cardable, Salarium and Infoshift. He is also the lead organizer of DevCup, the biggest developer hackathon in Manila. Former curator of Techstars Startup Digest in Philippines, a weekly newsletter digest of startup events. He is passionate about startups, inbound marketing, cryptocurrency and tech communities. John is very bullish on the future of blockchain technologies and he loves working at the forefront of an innovative space.

Diana Joy
Community Manager

Diana has a long history as an analyst doing research and data collection for buy and sell side financial institutions. She has held positions as an advisory analyst for NASDAQ and has several years of experience working for companies in the financial services industry.


Miko Matsumura
Miko Matsumura
Co-founder at Evercoin

Miko Matsumura founded crypto exchange Evercoin, and is a Limited Partner with the Pantera Capital ICO Fund (a $100M ICO-only fund). He is personally invested in FileCoin, Brave, CIVIC, Propy and Lyft. As a 25 year operating exec in Silicon Valley, he has raised over $50 million in capital for Open Source startups.

Moshe Hogeg
Co-Founder & President of Sirin Labs

Moshe is an accomplished serial entrepreneur in the technology sector. He is both chairman and co-founder of Singulariteam, a prominent Israeli tech venture capitalist vehicle. Moshe has played an active role across the development of SIRIN LABS, specifically in defining product functionality and underpinning technology.

Chris Dannen
Chris Dannen
Founder of Iterative Capital

Chris has extensive experience in blockchain technology including an advisor position at Blockmatics, a consultant with Bloomberg and a founder and partner at Iterative Capital Management. Chris also has a number of technology publications and has written at length about Ethereum and other cryptocurrencies. He specializes in business strategy and development.

Anton Dzyatkovsky
CEO of MicroMoney

Successful entrepreneur, diplomatic negotiator, extreme seller and creative expert in marketing. Anton’s a passionate and hardworking business leader with more than 13 years of experience in different positions within FinTech, Retail and E-Commerce.

Ivan Bjelajac
Operating Director at GoDaddy | Partner MVP Workshop

Passionate about developing products, systems, and working with people dedicated to building flat organizations, Ivan is driven by a search for game-changing brands that improve consumers’ lives. Ivan’s engineering background is in DevOps, System Engineering and Customer Support Analytics. In 2011 Ivan was declared one of the most successful young entrepreneurs under 30 years.

Dr. Elliot Noma
Algorithm/AI Advisor

Elliot teaches machine learning at Columbia University and quantitative risk management in the masters’ program for mathematical finance at Rutgers University. Elliot currently advises fin-tech companies in the application of machine learning, natural language processing and blockchain technologies.