If you did get a job at say AWS you would need to already have a proven skill in the field you want to get into. If you want to do groundbreaking work in datab

If you did get a job at say AWS you would need to already have a proven skill in the field you want to get into. If you want to do groundbreaking work in database software then you would need to have already a lot of experience in custom databases. If you're an outsider coming in you'll most likely be allocated to work on something typical and well understood. This is a good thing. You have so much to learn at these big companies that you'll be glad you're just modifying CSS or calling some API. Almost all the software you use in Amazon is proprietary. Get ready to relearn everything from scratch. Once you master the basics and you have an idea of a specific technology you want to contribute to then you go for the transfer. Eventually if you work hard for many years and don't take anything for granted then you will build groundbreaking tech.