Tzer-jen is a math professor who codes for fun and profit. He is an lecture of Taiwan AI Academy, an AI consultant of Ubitus, and the chief mathematician of iiNumbers. He is active in open source community, frequently presented in open source meetups and conferences . He is the founder of Hualien Python user group, GDG Hualien, and severed as a co-organizer of PyCon Taiwan and PyCon APAC. He also enjoys reading, painting, performing magic tricks, and learning new tricks.