Sean Cheng has worked as a full stack software engineer for Xmotors.ai since January 2019. He was tasked with developing web-based annotation and traffic data visualization tools using state-of-the-art technologies. Sean proved himself to be a dependable, hard working engineer who consistently met deadlines and explained technical work clearly. His former manager highly recommends him for a software engineer position.

1. Dear Hiring Manager,
I am writing this letter to recommend Sean (Xuesong) Cheng for the position of software engineer at your
company. Sean has been working as a full stack software engineer on my team since Jan, 2019. His passion,
technical skills and team spirit has made him a great engineer at Xmotors.ai.
Sean was tasked with end-to-end web based tooling development for annotation and traffic data visualization.
His work included requirements analysis and Web application development on a state-of-art tech stack. He
worked as a full-stack software engineer and he has developed many wonderful features that are very well
received by our stakeholders.
During the course of his employment, Sean proved himself to be a dependable engineer and a hard worker with
solid problem solving skills. I was always impressed by Sean’s ability to complete the work on time. Sean not
only met deadlines but also explained his work in a way that non-technical users could easily understand.
Sean also did an excellent job in analyzing requirements. He can always come up with creative ideas to
optimize product features and improve engineering efficiency. He is a reliable and highly capable engineer,
and I would highly recommend him to apply full-time job at your company.
Sincerely,
Yishu Lin
Principal Software Engineer, Xmotors.ai
yishu@xmotors.ai