About 7 months ago I interviewed at Twitter, making it through two phone interviews before failing to solve some tricky algorithms questions in the on-site inte

About 7 months ago I interviewed at Twitter, making it through two phone interviews before failing to solve some tricky algorithms questions in the on-site interview. Recently a Twitter recruiter contacted me on Linkedin looking for referrals and I sent him my resume, only to be told that they were looking for people with more experience, despite significantly more relevant experience on my resume. Is the BigCo interview process just that arbitrary?