OP here — I'll start with what finally worked for me: professional meetups and industry events in my field. Awkward at first, but three events in, faces became familiar and one casual chat turned into an actual job lead. Consistency beat charisma.
Half the jobs here seem to go through people who know people, and I know exactly nobody. Cold applications vanish into the void. For those who cracked it — how did you build a professional network from zero in a new country, without it feeling forced or transactional?