Pinterest Machine Learning Engineer interview experience

The structure was intense: two machine-learning design rounds and two coding rounds, with each coding round containing two coding questions. All the coding problems were LeetCode-level medium.

For the ML design rounds, the interviews focused heavily on end-to-end pipeline thinking, not just picking models or discussing metrics. It felt like they were testing whether I could reason through how data would flow through the whole system and how you’d make decisions across the pipeline.

By the end, the difficulty felt consistently high across rounds, not concentrated in just one. I didn’t get an