Introducing a kitten to dogs?

[CandyAppleFudge]

We've put a deposit down on a little female Siberian kitten, she comes home on the 9th May. Any tips on how to introduce her to 2 dogs?

What kind of dogs are they? (And how old etc.)

Don't let the dogs rush in and overwhelm the kitten, make sure any interaction is done on her terms, give her safe spaces to get to (up is usually a good direction). Don't leave them alone together and don't let the dogs chase her, at all. Food and litter trays should be somewhere dog free or relatively dog free.

How are the dogs with cats and do they have a reliable leave command?

They're both French Mastiffs, male is 5 years old and female is 3 years old.

They've met cats outside and in my friends house and ignored them. They'll leave something alone if told 'leave'

That's not a breed I know particularly though I'm assuming they're both steady and well-socialized dogs. Good to know that they pay no heed to cats in other situations although this kitten would be coming onto their territory so I wouldn't leave them alone for a good while. tabulah has given you good advice.