Tell us about your role and projects at [organization] in three sentences: role, key achievement, reason for leaving.

In my role as a machine learning engineer at [organization], I was involved in developing and implementing user behavior prediction models, which increased recommendation accuracy by 15%. A key achievement was creating an automatic hyperparameter tuning system that halved the model training time. The reason for leaving was the desire to grow in a larger project with an international team and new challenges.