This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Staff Engineer - Recommendations based in Spain. This role focuses on building the data and machine learning foundations that power personalized discovery and social experiences at scale.You will help evolve recommendation systems that connect users with relevant content, communities, groups, and events.Working across data engineering, backend development, and personalization, you will design systems capable of processing large volumes of platform-generated data.You will collaborate closely with data scientists, product managers, and engineers to turn behavioral signals into meaningful user experiences.The role offers significant technical scope across cloud infrastructure, data pipelines, APIs, distributed systems, and ML-enabled applications.You will also help advance personalization from simple heuristics toward increasingly sophisticated, data-driven recommendations.This is an opportunity to make a direct impact on a highly interactive consumer platform within a distributed, collaborative engineering environment.