Aan-Chien Tan is a Lead Quality Engineer at Vivid Seats LLC based in Chicago. He is responsible for ensuring and maintaining quality for Vivid’s marketing, white-label business, and many of Vivid’s third-party integrations. Chien does end to end manual and automated testing from API to A/B Testing. Before joining Vivid Seats, Chien worked at CIMB Bank, one of the largest banks in South East Asia, where he was the functional architect leading both quality and business analysis for CIMB’s digital transformation project. Chien is passionate about data modeling and using Machine Learning to solve software engineering problems.