The Quantstamp Team

Richard Ma
Richard Ma
Co-founder & CEO
Richard Ma is a former software engineer at Tower Research where he developed software that handled millions of dollars using extreme testing methods. He was inspired to found Quantstamp after investing in the DAO and experiencing the aftermath firsthand. Richard aims to secure the future of blockchain technology through the Quantstamp protocol.
Steven Stewart
Steven Stewart
Co-founder & CTO
Steven Stewart is Co-founder and Chief Technology Officer at Quantstamp. Previously, he has worked as a Software Engineer and Computer Systems Analyst at the Canadian Department of National Defense. He also co-founded GPU computing startup Many Trees Inc., and has worked as a Software Developer at Magnetic Forensics.
Linda Selker
Linda Selker
VP of Legal
Linda Selker was formerly VP/Associate General Counsel at Visa and Senior IP counsel at HP. At Visa, Linda played a key role in improving the security around mobile wallets. She has a JD from Georgetown University’s School of Law, a Masters Degree in Electrical Engineering from Cornell, and a bachelor’s in Electrical Engineering & CS from UC Berkeley.
Olga V. Mack
Olga V. Mack
VP of Strategy
Olga V. Mack is Vice President of Strategy at Quantstamp. Most recently, she served as General Counsel at ClearSlide, and she has held various roles at Visa, Zoosk, Pacific Art League, Wilson Sonsini, and Yahoo. She earned both her J.D. and B.A. from UC Berkeley.
Don Ho
Don Ho
Business Development
Don is an investor and entrepreneur with global perspectives and cross-functional experiences supporting investments, product and growth. Don previously worked at IDG Ventures and PNP Ventures where he helped launch Nexla, Ayasdi, and the Los Angeles Football Club.
Krishna Sriram
Krishna Sriram
Business Development
Krishna is an early blockchain investor with extensive experience in building the Ethereum community in Vancouver, Canada. Krishna is an expert at community outreach and forming global partnerships. He is a University of British Columbia graduate.
Kei Oda
Kei Oda
Head of Japan and APAC
Kei leads Quantstamp’s business in Japan and Asia-Pacific. Before Quantstamp, Kei spent 16 years working as a macro rates trader at Goldman Sachs in London and Tokyo. Kei loves thinking about macro trends and sees blockchain as the future of money. He received his Masters in Economics from the University of Cambridge.
Tristan Tomas
Tristan Tomas
Operations Officer
Tristan is a blockchain investor, operations specialist and entrepreneur. He previously worked on projects for Facebook, Twitter and the IRS. He is a veteran.
Jackson Walker
Jackson Walker
Lead Product designer
Jackson’s focus includes user-centered product design, vector visual design, high-fidelity UI, motion, branding and rapid prototypes. He’s designed for Google, Apple, and managed design teams several startups. He believes that premium design is simple, polished, and solves real user problems with a focused utility.
Amir Marmar
Amir Marmar
Director of Finance
Amir Marmar has spent over 20 years working in Accounting & Finance and is now recognized as one of the leading crypto accountants. Amir has led many companies to successful exits including selling Coinsetter Inc. to Kraken in 2016. When Amir isn’t working, he spends time with his wife Laura and girls Madison and Mia.
Kacper Bąk
Kacper Bąk
Senior Research Engineer
Kacper is an expert in software modeling and verification. He received a Computer Science PhD from the University of Waterloo for his work on modeling and analysis of software product lines. He was previously employed at MathWorks (MATLAB and Simulink), Opera (browser) and Samsung.
Leonardo Passos
Leonardo Passos
Senior Research Engineer
Leonardo has an Electrical and Computer Engineering Ph.D. from University of Waterloo for his work on mining patterns from the Linux kernel source code and other systems. A Microsoft research competition medalist, with industry experience in backend development, compilers, and scalable data pipelines.
Sabrina Keum
Sabrina Keum
Senior Software Engineer
Sabrina is a software engineer with a strong background in web and mobile development. Her academic background includes business, real estate, and computer science. In her free time, Sabrina enjoys playing violin, and watching TED talks with her cats.
Sebastian Heit
Sebastian Heit
Front End Developer
Sebastian is an experience designer and front-end developer with a background in Architecture, focused on delivering user experiences for web and mobile applications. Previously, he co-founded two consulting firms –Zimmic & Crafted– to serve corporate clients and startups in the Salesforce and Ruby on Rails ecosystems.
Jared Harrill
Jared Harrill
Community Manager & Advocate
Jared developed his community management skills in Vancouver, Canada, where he was heavily embedded in the cryptocurrency community. Jared is an expert in decentralized organizational governance and has experience in communications and design.
Alex Murashkin
Alex Murashkin
Senior Software Engineer
Alex is a full-stack software engineer with advanced knowledge of Amazon Web Services and cloud computing security. He also has experience in designing and implementing distributed systems and serverless computing architectures.
Emily Hinojos
Emily Hinojos
Executive Assistant
Emily previously worked for the Office of the Legal Defender within Maricopa County. As a Legal Support Specialist, she contributed both on the administrative side along with the day-to-day Operations of the Department.
Yohei Oka
Yohei Oka
Forward Deployed Engineer
Yohei is a full stack engineer with experience working at both startups and larger tech companies. Most recently, Yohei was in Seattle working on Amazon Go, the no-checkout convenience store. Yohei got involved with blockchain through arbitrage and bot-trading and is now a big believer in the future of smart contracts.
Julian Martinez
Julian Martinez
Staff Writer
Julian is a cryptocurrency enthusiast and blog writer. He hopes to help blockchain technology achieve its full potential by translating its importance to the masses. He graduated from UC Berkeley and was a non-profit director.
David Partridge
David Partridge
Community Manager / EA
David is an award winning and innovative community manager with a vision for a more decentralized future. Having worked across many industries and continents, he has etched a unique skillset to help him connect people and build cultures. His efforts are now focused on making Quantstamp a recognized industry leader.
Jan Gorzny
Jan Gorzny
Blockchain Researcher
Jan is a Ph.D. at the University of Waterloo. His research interests include complexity theory, software verification and formal methods, discrete mathematics, and blockchain technologies.
Vajih Montaghami
Vajih Montaghami
Senior Research Engineer
Vajih is an expert in software verification, security infrastructure and scalable systems. He received his Electrical and Computer Science PhD from the University of Waterloo for his work on verifying formal models. Vajih is a former Amazon employee.
Michael Teixeira
Michael Teixeira
Software Engineer
Michael Teixeira is a software engineer for Quantstamp. He has many years of experience in the field.
Ed Zulkoski
Ed Zulkoski
Senior Security Engineer
Ed is a PhD student at the University of Waterloo. Ed is broadly interested in SAT/SMT solvers and formal verification technologies. His PhD thesis aims at achieving a better understanding of what makes SAT formulas hard or easy for solvers.
Martin Derka
Martin Derka
Senior Research Engineer
Martin holds a Ph.D. in Computer Science from the University of Waterloo. He also studied at Brock University, McMaster University, Masaryk University in the Czech Republic, and has additional degrees from some of these. He is former Vanier Scholar and a brief NSERC post-doctoral fellow at Carleton University.
Austin Guest
Austin Guest
Senior Software Engineer
Austin is a tenacious full-stack problem solver with a passion for clean design and security. He has delivered mission-critical enterprise software for Fortune 500 companies at ThoughtWorks and built payment processing microservices at SoundCloud. Austin's interest in tech took flight during his days as a core organizer of Occupy Wall Street.
Dan Zhang
Dan Zhang
Senior Copywriter
Dan Zhang supports Quantstamp’s PR and marketing communications with years of experience writing for high-tech PR agencies and brands. Dan has a computer engineering degree from the University of Maryland. When not working, he enjoys rock climbing, craft beer, and traveling.