Got approached on Whatsapp for a remote job...

Im VERY skeptical these days after i almost went through a major check fraud scam a few weeks ago. Yesterday i got contacted by a member of a local staffing group with an offer (i actually remember applying to this agency, so it didn't seem fishy to me), but i got contacted through whatsapp. Idk if this is a new method of contact for remote jobs or just interviews in general, but im skeptical. The supposed job is working online for Kayak, dealing with hotel reservations and optimizing customer service, anyone here received similar offers?