Implementation Specialist applicants have rated the interview process at Castlight with 3 out of 5 (where 5 is the highest level of difficulty) and assessed their interview experience as 100% positive. To compare, the company-average is 38.7% positive. This is according to Glassdoor user ratings.
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The interviewers were down to earth and friendly. Took a while for them to get back though because they were interviewing many people. The office place itself is nice and very welcoming.