Junior Survey Developer applicants have rated the interview process at Ipsos 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 58.7% positive. This is according to Glassdoor user ratings.
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The technical interview was interesting, it included two algorithmic tasks, the people from the company were kind and helpful. The only downside I would give is that they didn't give me feedback.