Thoughtworks offers a one-year immersive training program for graduates and career changers, combining technical skill development, mentorship, and real-world client experience to prepare future leaders in technology.
Progression from graduate consultant to consultant happens quite quickly (assuming all goes well), and from there the flat company structure makes it very possible to move upwards (or across). As an example, our CEO started out as a software developer.
They seem to be very about workign with you to develop you're career as you want, you can specialise in areas & take on more leadership roles as you go. It's also common for people to switch fields (Eg a dev becoming a BA, or an XD becoming a Dev
There are many opportunities to move up in pay and position. While there is no clear promotion path there is variety in choice to develop into the position that you want.