Senior ML Engineer at Zalando: three months, one referral that mattered

Looking for ML roles in Europe took longer and was more draining than I'd expected. I sent out 32 applications over roughly three months, and the pattern of rejections got predictable fast: most teams either wanted a PhD as a hard filter or were exclusively chasing LLM fine-tuning experience. My background is recommender systems and production ML tooling, the unglamorous plumbing that keeps models running at scale, and that combination landed awkwardly in a lot of job descriptions written with transformer research in mind. I got through to interviews at six places total, which felt like a low conversion rate for the volume I was pushing, and a couple of those early rounds ended with feedback that basically confirmed I was the wrong shape for what they were building. The offer I eventually accepted came through a referral, and that was the only thing that broke the pattern. An ex-colleague from a previous startup had joined Zalando in Berlin and flagged my name internally when a Senior ML Engineer position opened up. That internal signal seemed to get my application read differently. The recruiter reached out within a week, which hadn't happened anywhere else in this search. The process itself was rigorous: three technical rounds ↓