About the Author

Zhiyong Tan is a manager at PayPal. Previously, he worked as a senior full-stack engineer at Uber, as a data engineer at small startups, and as a software engineer at Teradata. Over the years, he has been on both sides of the table in numerous system design interviews. Zhiyong has also received prized job offers from prominent companies such as Amazon, Apple and Bytedance/TikTok.