I applied through college or university. The process took 4 weeks. I interviewed at Amazon (Barcelona) in Sep 2024
Interview
Code interview, some simple data structure questions 2hich do not evaluate efficiency of the code only that all the tests are successfully passed. In my case, it was a greedy problem and a graph theory problem.
Quick and easy. Interviewers really accomodating. Prevalently on Amazon's culture and an additional business case. Two consecutive interviews one after one other. Got an answer after two days from HR. Smooth process.
Interview questions [1]
Question 1
Tell me about a time in which you had to deal with a conflict
During the interview, the interviewer fired off a series of tough behavioral questions that probed my past challenges and decision‑making—questions that, given their depth, easily consumed several minutes each—before pivoting to core machine‑learning concepts like contrastive learning, where they quizzed me on how I’d construct anchor‑positive‑negative pairs, choose an appropriate loss (e.g. InfoNCE versus triplet loss), and leverage large batch or memory‑bank strategies to learn robust embeddings; finally, they pressed me on post‑training techniques for LLMs, asking how I’d apply methods such as fine‑tuning, parameter‑efficient adapters like LoRA, low‑bit quantization, pruning, distillation, and even RLHF to both shrink model size and align outputs with human preferences—all delivered with a somewhat challenging tone that tested not only my technical knowledge but also my ability to stay calm, structured, and concise under pressure.
Interview questions [1]
Question 1
What's contrastive learning? Tell me about the procedure