These days, most Ruby on Rails applications that are advanced utilize AWS to some extent. From hosting files on AWS S3 to running containerized applications with plenty of services involved.
Are you willing to become a top-paid Ruby engineer? Knowledge about AWS is among the most desired skills that a Rails developer can have. This book is the key to this knowledge. The lack of experience in cloud technologies is costly, but I learned the most important lessons so you don't have to do it on your own.