Feyzi Çelik, President and Chief Executive Officer

Feyzi Çelik is the founder of OnePIN®, an industry visionary and an inventor at heart. His innovations include CallerXchange®, a mobile service which allows subscribers to manage their phonebooks; MessageXpress™, a “quick message” mobile service for subscribers to quickly send a personalized message with 1-click after missed calls; ZeroX™, a zero balance call back and funds transfer enabler; AdXecutive™, a mobile phonebook advertising service for Enterprises; SurveyXpert™, an after-call survey service for Enterprises; SocialLinX™, an after call social media invitations service; MaXapp™, a mobile application marketing and promotions service; BoosterX™, a universal top-up and up-sell service; NetMetriX™, a network analytics service; LocaXion™, a location based marketing service; and AuthenXicator™, a single sign-on mobile service for the Mobile Operators.

Under Çelik’s direction, OnePIN is working with leading telecommunications firms to bring OnePIN’s cutting-edge technologies to the mobile phones of subscribers worldwide. OnePIN is now servicing 30 mobile operators including Vodafone, Orange, MTS, MTN, Etisalat, NetOne, Cable & Wireless, GlobaCom, and BaikalWestCom. Its customer base spans the globe and includes more than 240 million mobile subscribers.

Çelik raised over $26 million in funding for OnePIN from four Venture Capital firms: Stage 1 Ventures, FA Technology Fund, Egan Managed Capital and Greycroft Partners.

Prior to founding OnePIN, Çelik served as president and CEO of the North American division of Koc Group, a $40 billion Fortune Global 500 company based in Istanbul.

Çelik holds a master’s degree in business administration with high distinction from the Babson College Graduate School of Business, a master’s degree in mechanical engineering from Boston University and a bachelor’s degree in mechanical engineering from the Middle East Technical University (METU) College of Engineering.

Çelik is the recipient of the Babson College W.F. Glavin Center Global Entrepreneur Award.

Çelik holds twenty global patents related to OnePIN technologies.  Çelik is also the main inventor on a number of patents currently in the pending stage both nationally and internationally.


Christopher DeGrace manages OnePIN’s global product and alliances strategies, enabling OnePIN to be the world’s leading provider of Digital User Engagement services for mobile network operators. He maps product development to emerging international trends so that OnePIN’s suite of mobile services becomes the primary user engagement platform for mobile operators around the world.

DeGrace is responsible for brokering and expanding strategic partnerships with key industry players in the mobile, media/advertising and technology sectors.  Under DeGrace’s direction, the company has established and expanded strong footprints into various global markets.  Notably, his leadership has generated success across the continent of Africa, the world’s fastest growing mobile market.

DeGrace brings nearly twenty years of experience in technology solutions design, market development and operations for fast-growing high technology companies to his role at OnePIN.

Prior to OnePIN, DeGrace was a ground-level team member and Managing Director for Cyberplex (TSX.CX), a publicly held technology and media consulting and integration firm, where he established the company in Eastern Canada the U.S. to help corporations strategically integrate technology into their core businesses.

DeGrace was also a founding member of Internet professional services firm Webworks Worldwide Inc. He has a bachelor’s degree in business administration / computer science from Acadia University in Nova Scotia, Canada.

Marcin Nowak, Vice President, Software Engineering

Marcin Nowak directs the company’s engineering operations and is the chief architect of OnePIN’s mobile technologies. Nowak has built a world-class software development team that has pioneered unique information exchange applications such as CallerXchange for the mobile industry.

With over fifteen years of experience, his knowledge spans hardware, software, network operations, application development and Web services.

Prior to OnePIN, Nowak developed software products for the cable and broadband industries at RiverDelta Networks (now a division of Motorola).

Nowak holds a master’s degree in computer science from Poland’s Silesian Technical University.