Kostiantyn Kolontai is an accomplished software development engineer with extensive experience in mobile app development, particularly for iOS. Currently serving as an Advisor II at Fiserv since March 2025, Kostiantyn has previously held multiple roles at Payfare Inc., including Staff Mobile Engineer and Senior Software Engineer, following its acquisition by Fiserv. With a career that began in 2010 as the Deputy Director at Ukrtelecom, Kostiantyn has developed a wide range of skills through various iOS developer positions across several companies. Educational qualifications include an Engineer's degree in telecommunications from Odessa National Telecommunications Academy, alongside specialized training in cloud development and mobile app development from various institutions. Key achievements include the development of MD Fashion, which has gained over 17,000 active users.
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