I work for a small-medium sized startup with a development team of 20 people and a very strong engineering culture. Engineering itself is split into smaller sub-teams and I am the only person responsible for a particular component (which is quite critical to the whole organisation).
We have now finally managed to hire another engineer to start working with me, which is great and will help me a lot, but comes with the inherent challenge of moving away from a solo dev team.
What are some of the challenges that exist when adding a second engineer to a team? I've already had a look at this question where the accepted answer suggests having a
good onboarding process but doesn't really go into the details of what that actually means. I'm more interested in understanding what kind of things I should change on a day to day basis to make sure that this transition is a success.