My GF has two nibbles on her resume, and both want her to communicate through either Signal or Telegram.
Edit: they requested banking info right off the bat. Said they use it to “confirm you have a checking account” to verify eligibility. Blocked them on Signal, reported to Indeed, for whatever that’s worth.
some recruiters wrote to me on WhatsApp :)
WhatsApp is a bit different since many countries use that instead of SMS. Suppose it depends on the culture of where you’re applying. Always pays to use caution though.