CEO and Co-founder
An entrepreneur and developer, Nat is passionate about building products that delight developers. Nat has two degrees from MIT and has been writing software for 27 years. In 1997, Nat co-founded and served as chairman of the GNOME foundation. In 1999 he co-founded Ximian with Miguel. At Novell, Nat ran engineering for a $110M product and was CTO of the Linux business. Nat is an avid traveler who visited 20 countries in 2010, an active angel investor, and a private pilot.
Miguel de Icaza
CTO and Co-founder
Miguel has directed the Mono project since its creation in 2001 and led the launches of Mono's releases at Novell. Before Mono he co-founded the GNOME project in 1997 and in 1999 he co-founded Ximian with Nat. He has received the Free Software Foundation 1999 Free Software Award, the MIT Technology Review Innovator of the Year Award in 1999, and was named one of Time Magazine's 100 innovators for the new century in September 2000.
Bryan brings nearly two decades of financial and operational leadership to Xamarin, with an extensive background in SaaS, enterprise software, and hyper-growth start-ups. Most recently, Bryan was CFO at LiveRamp where he was instrumental in building out the G&A organization during a period of rapid growth, leading up to the acquisition of LiveRamp by Acxiom Corporation. Prior to LiveRamp, Bryan was VP Finance at Ooyala (acquired by Telstra), where he was key in scaling the company from pre-revenue operations to becoming a leader in online video technology. Bryan holds a B.A. is business economics from UC Santa Barbara.
SVP of Sales and Customer Success
Stephanie has led sales and marketing teams in the software industry since the year 2000. Her experience ranges from successful software startups to running sales operations for a $380M sales organization. She has worked in six countries, speaks five languages, and holds a Masters degree in International Business. She is passionate about mobility, loves to travel, is an avid photographer and dance instructor.
Jo Ann Buckner
VP of Marketing
Jo Ann has held technology product management and marketing leadership roles for 20 years. She has deep expertise in mobile, cloud, and developer platforms, coming to Xamarin from Appcelerator and Adobe. Jo Ann led Adobe’s game-changing Creative Cloud and Touch Apps subscription business. She is passionate about mobile apps and devices, creative marketing, and building vibrant developer communities.
VP of Business Development
Rob is a serial entrepreneur, having led business development at several venture-backed startups that IPOd or were acquired. After starting his career as an engineer at Apple, Rob ran business development at Individual, ValiCert, Adero, Zero G and Cryptography Research. Rob got his undergraduate degree from Duke University and is an avid sailer, open water swimmer and tennis player.
VP of Product
Keith has a strong background in entrepreneurship and product management, dating back to his time as a PM on the original .NET team in 1999, working on the .NET Framework networking stack and ASP.NET Web Services. In 2007, Keith left Microsoft for the startup world, co-founding a web-based OS startup and Ravid, a popular mobile video messaging startup. In 2013, Keith joined YC-backed startup Standard Treasury as Chief Architect building an API-first bank. He's the author of .NET Web Service: Architecture and Implementation and co-author of Special Edition: Using ASP.
Director of Developer Relations and Co-founder
Director of Developer Relations and Co-Founder
Joseph has been an active participant in the Mono community since 2003, and has also contributed to several open source .NET applications. As a professional developer, he has worked with several Fortune 500 companies in designing and implementing .NET applications. In January 2008, Joseph joined Novell to serve as the Product Manager for Mono, ultimately driving the product development and marketing efforts to launch Xamarin’s commercial products.
Vice President of Education Services
Bryan Costanich is the Vice President of Education Services at Xamarin and heads up both Xamarin University and the Documentation team. He's a renowned Software Architect, published author, mobile development expert, and a seasoned entrepreneur. In addition to having published App Store apps, he led the team that built Cricket's MuveMusic service, which runs on Android and is the largest mobile music subscription service on the planet. When not working in tech, you can find Bryan building robots, monkeying around in Hollywood, or out in the mountains (usually hanging from a cliff).