TikTok Data Scientist interview experience

After the initial outreach, I hit a technical screen that combined experimental design and SQL: I was asked to design an A/B test for a ranking model, and then I worked through a SQL challenge involving user sessions. I remember how the SQL problem had a familiar shape—somehow it felt like a twist on one I’d been practicing just a few days earlier.

Once that technical round was done, I went through additional interviews that focused more on how I think and talk through my experience. I answered behavioral questions and connected them back to how I’d handle metrics, experimentation, and