Mustafa Hakkı, a 1991 graduate of Boğaziçi University's Department of Business Administration, worked for Yapı Kredi Bank in several capacities, including financial analysis, corporate marketing, and sales management until 2000. During the bank's 1993–98 Transformation Journey and YK2000 Project processes, he was in charge of projects, particularly those requiring technology transformation, in the fields of Customer Information File, Information Quality Improvement, Commercial Loans, Y2K Business Risk, Credit Rating, Data Warehouse, Chain Collection System, Bank Reconciliation Program, Profitability Management System, Corporate Marketing and Cash Management, and Bank Reconciliation Program in particular. He left this role in 2000 to found addand currently shares his professional experience with add customers for their change and transformation processes, allowing them to stay on the cutting edge of today's industry.

Mustafa Hakkı, who attended Galatasaray High School for his secondary and high school education, speaks French, English, Greek, and Italian.