I've been a professional developer for over 25 years. However, the last 20 years have been with a single company creating line of business applications by myself.
I'm afraid that my company is about to be sold and that the buyers may not want to keep using our software but switch us to their platforms and that my services will not be needed anymore. A few years ago I saw this as a possibility and got a BS in Software Development to help jumpstart my impending job search.
My concern is that managers won’t want to hire me because I’ve never been a team player, which is fair because I don’t really know how to be a team player.
I've been reading up quite a bit on how to improve my soft skills to be a team player, but what I'm really concerened about is the actual technical aspects. I'm looking for specific suggestions on things like code reviews, pull requests, build tools and stuff like that.
I use visual studio, versions 2010 - 2019, and webstorm as my IDEs
I use git for my source control.
I'm looking for to move into a Sr. Dev. position somewhere.
So my actual question is "What skills do i need to learn on my own so that I can get hired as anything but a entry level developer?"