I agree, plenty of tech jobs in HK specially in AI, Cloud and Big data. These jobs are equally available in startups as well as big enterprises, at least that's what I can see.
7 years back when I graduated in HK it was a different story, even after a Masters there were not much job options and very slow growth. Things are great now specially for your field and with few years of experience you will be warmly welcomed in HK.
there are advantages :-
1: one of the lowest murder rate/ verylow crime rate
2: world class public transportation
3: large percentage of locals have basic english/some are even quite proficient in english (but no where compare to singapore)
4: according to wiki, hk is in the same catergory as USA and Singapore in the democracy index
5: low direct taxation, but high indirect taxes, ie, car, petrol, property, cigarettes, etc
The protests aren't going to last forever, but they likely won't end soon either. Coming to HK has risk, if the economy is on the way down and you have to lock yourself into a lease, is it worth it for you?
Some people say HK has crappy housing, I recently moved back to the states, and a few tedious things annoy me about housing here, and HK seems to have it on point.