The three-step interview process: phone screening – phone interview with two user researchers – two rounds of on-site interview with two senior user researchers and two product owners.
First of all, I was very satisfied with the entire hiring process. It was very professional, smooth and fast. After reading all these negative reviews on glassdoor I was prepared to the worst, but cannot complain at all. The UX research team has an exceptionally great recruiter, so do not hesitate to apply, you won't be disappointed.
I was very pleased with both phone and on-site interviews as well. The screening interview is all about your motivation and previous experience. The phone interview is about your expertise in user research methods, A/B testing, and the most important – business-relevant metrics to measure success. For the first on-site interview you have to prepare a case study presentation on a given research question, suggestions for A/B or MVT, and insights from your own review as a customer. The second on-site interview is all about user research and agile product development, and it is the most important part.
The reason I didn’t get an offer was “no work experience in agile product development”, and it was fair enough. They are looking for a person who can immediately start working independently. No mentoring provided. You should be able to prioritize on-a-fly multiple research demands from multiple stakeholders (product owners), constantly deliver a set of prioritized features and functionalities, and A/B testing plan to measure success. It means you must have a strong background in UX research for in-house agile development within e-commerce. If you possess all mentioned above capabilities I would strongly recommend you to apply. If not, do not waste your time.
Some tips for interview. First, when it comes to usability testing, do not think in terms of reliability and validity, think how fast you can deliver the results. As I understood, they usually conduct a guerrilla testing (mostly with team members), not a full-fledged evaluation. Time is what matters. Second, think in that way about each method you would recommend. Finally, do not suggest any improvement which is not a case for A/B testing, it confuses product owners. They do not think in terms of overall customer experience, retention and loyalty, they think in order conversion rates.
In essence, the interview isn’t difficult, no tricky questions, if you are agile enough. Keep it in mind and good luck.