Yannarak Wannasai

Yannarak Wannasai is a seasoned engineering leader with extensive experience in security engineering and application security. Currently serving as a Senior Engineering Manager for Security Engineering at Mercari, Inc., Yannarak oversees a global team focused on product and platform security. Previous roles include leading the application security team at Woven by Toyota and various security management positions at Mercari, where Yannarak developed comprehensive security strategies and managed significant cybersecurity projects. With a solid educational foundation in Security & Mobile Computing from KTH Royal Institute of Technology and Aalto University, Yannarak has demonstrated expertise in vulnerability assessments, threat modeling, and secure software development throughout a diverse career spanning multiple companies, including Rakuten and Kimberly-Clark.