It depends on what you want your developer to become better at.
But first and foremost your developer will learn discipline and structure while working.
Other than that, we offer a variety of topics for you to choose from.
Probably the most important one is learning to work on the TYPO3 Core. Guided by a veteran core-dev your developer will push and review patches, learn the structure of the TYPO3 core and be able to see for themselves what a Core-Dev does and in the end do it themselves.
If you want your devs to get used to modern project-management you can opt-in to have them work together with our team on internal projects. We work in an agile fashion fully embracing SCRUM methodology with bi-weekly sprint cycles.
Finally you can train your developers in giving support to end-users. Your employee will be integrated into our international team and yes, they will be able to speak to people after that.