Hi {!first_name},
Thank you for your interest in Twitter! We have reviewed your CV for this position, and whilst we feel you have an interesting profile your background is not suited to this particular role.
We will also keep your CV on file should other suitable opportunities arise, but please feel free to check back on our careers page for other roles that may be of interest to you.
Thanks again for considering Twitter and we wish you success on your job search.
Sincerely,Twitter Recruiting