And what if my social media presence is minimal or not public?
I know you are a web developer, full stack but with a slant towards backend, like the Jetbrains applications, run a Thinkpad with Windows OS, have a beard (by your own admission), possibly live in a Nordic country but I don't think you are from there (UK I think, London area, or at least lived in London, or you live in the far North of Scotland or London has been a bit dark this year), are in your late 50's or early 60's, have a small family, like noisy keyboards, dislike Vim, absolutely loathe "Fn" keys, own a Mac that you ocassionally use, enjoyed Star Trek: TOS, run Android on a Samsung Galaxy (S3, Nexus 5, S10). You didn't wait for your resin in your table to reach flashover point. Found your reddit account, your stackoverflow, your github, and your abandoned twitter account, looks like you purged your Facebook account but didn't delete it. I am pretty sure you used to skateboard, enjoy riding a fixie bike and photography, possibly did some rock climbing in your youth. I may be off on some of the details, I only spent 20 minutes on it. Of course, I might be connecting two different sets of data points about two different people.
Over-sized coloured mice are very clever if they can build the CMS for a real estate agent.
My point is, people are "findable."
Update: Pretty sure I found your LinkedIn.
I deemed the points listed important enough to list here to indicate that you are findable, even when you think you're not. I was also careful about not just saying you're "X that works at company Y" with a bunch of links. Based on what I have read I think you are a competent, level-headed, well-rounded and reasonable person with strong opinions about what you want from your technology with a willingness to compromise. You're also an exceptionally competent developer and team lead and I wouldn't hesitate to hire you.
A social media presence, even when we don't want people to see it, can either accelerate the point to hire or the cut the interview short. I don't look to see if someone does drugs, binge drinks alcohol, enjoys going to fringe fandom conventions or spends their income on collectible dolls. I care that the person we're interviewing isn't expressing undesirable opinions about people of colour, sexual orientation or many other aspects that would bring undesirable prejudices in to the team.
Based on what I've read, your interview would consist of "when can you start?"
Regarding a "plan B" for no social media presence at all, then the interview process becomes much lengthier and more difficult for all involved.