Crystal Jin is a skilled software engineer with extensive experience in both internships and professional roles. Crystal interned at Facebook in 2021, where an internal ads inspection tool was launched, and honed skills in C++ for ads delivery logging. Prior to that, an internship at Google involved driving the open-source project Sensor Historian, utilizing Golang and JavaScript to enhance sensor activity debugging on Android devices. Crystal also served as a teaching assistant for Distributed Systems at Carnegie Mellon University, where a Master's degree in Computer Science was earned in 2021. Currently, Crystal holds a Software Engineer position at Meta, focusing on Buyer Experience and FB Ads Delivery. Recently promoted to Senior Software Engineer, responsibilities continue to include key contributions to FB Ads Delivery.