Sergey is a tech entrepreneur based in Kraków, Poland, recognized by Forbes 30 Under 30 Europe (2019, for CallPage) and Forbes 30 Under 30 Poland (2023, for Certifier). He co-founded CallPage, a VC-backed B2B SaaS that raised $4.5M and was later acquired by SaaS Labs in 2021, where he led marketing, growth, and lead acquisition.
In 2020, Sergey launched Certifier, a platform building digital credential infrastructure through APIs and tools for issuing, managing, and verifying certificates, diplomas, and badges. Today, Certifier serves more than 2,000 business and institutional clients worldwide, and Sergey is a frequent public voice on digital certification, identity, and the future of credentialing.







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