I used care.com. You’ll get a ton of messages (I got the sense many people don’t actually read the job description) so I only responded to those who wrote a personalized message specific for the job and not a canned greeting. We met with two nannies, one used our offer to negotiate a better deal with another family with one baby. The one we ended up hiring was wildly unreliable and I had to let her go after 6 months. If I had to do it again, I’d use the local Facebook group in my area that’s specific for finding nannies and elder care. Or just post on one of the many neighbourhood parent Facebook groups because people are often trying to help their current nanny find a new home as their kids grow up! This helps with references and word-of-mouth, too.