3 months contract

Now a lot of companies like 3 months, 6 months contract. as it is easy for finance operation.
Especially, if they already get a lot of permanant employees, they like to hair someone just for some work, when the work finish, then the employment finish.
Nothing about doult of you capability. If they doult that, they will let you leave when the first 3 months finish.

You should let them know you idea, you feel a little bit nervous and want to know any possible of longer contract.