Leon Wei is a seasoned expert in the field of data science, analytics, and machine learning. With over a decade of experience in the industry, Wei has held various senior positions at top-tier companies such as Apple, Chegg Inc., and Amazon. He is the CEO and Founder of instamentor.com, a mentoring platform that focuses on job search and career growth. In addition, Wei is a technical advisor to a few startups on AI and Machine Learning strategies and runs SQLPad.io, a web-based SQL editor and reporting tool. With vast knowledge in Python/Django, Javascript/jQuery, Swift/SwiftUI, Postgres, Spark, and AWS/Heroku, Wei has a proven track record of developing and managing large-scale machine learning systems. Wei is an expert in product and marketing for early-stage startups and has worked extensively in the Education, E-Commerce, and Advertising industries.