However, there are a lot of jobs for which being young, confident, and attractive are pretty valuable skills. So I'm sure that it will enjoy fairly wide adoption.
I used to work at a co building a chatbot to filter candidates for low-skill hiring (restuarant, retail, etc). These hiring processes are sometimes little more than 1) do you meet a basic list of requirements and 2) are you "okay" -- ie not going to be slovenly, violent, rude to customers, dumb, etc. Step 1 is trivial enough that we automated it away, and step 2 is crucial enough that we _always_ scheduled an interview once a candidate was qualified. The same bias exists towards young, energetic, and socially-savvy people, but 1) it seems unavoidable, given how expansive and inaeticulable the goals of the interview are and 2) it's fairly relevant to many of the jobs, particularly customer-facing ones.
Funnily enough, we actually had a feature requested by a couple of companies to make candidates upload videos, for exactly the reasons I described above. This is the niche that Tiktok is trying to operationalize. While going through videos is slow and expensive, going through interviews is much more so.
Regarding young candidates: it's specifically targeted at Gen-Z.
Regarding attractiveness, confidence and experience talking/acting in front of a camera: there are a lot of jobs where that's important.
I doubt the intention is to hire senior engineers via tiktok.
Just please don't use it to try to hire me in tech! I have enough disadvantages, I don't need my monstrous looks and obvious signs of old age to put me at a greater disadvantage. Written resume for me, thankyouverymuch. At least a written resume helps you get your foot into the door before the onsite interview happens and looks-based biases start making their way in.
Is this not exactly the same for regular interviews today? Ageism is a huge problem. People who lack confidence won't do as well, etc.
Most people have an online profile, so what's preventing the interviewer/hiring personnel from just looking them up online?
Citations needed. What % of currently alive humans have an 'online' profile, how are you measuring that statistic? Are they engaging actively? How many have never had a smartphone, how many do not use social media at all?
Without sources and actual numbers it's hard to take your point seriously. MOST people do this on Hackernews, claiming "most" or "everyone" or "the majority of..." without actual data to back that up.
It sounds like a bad idea.