Our partner is looking for a Machine Learning Engineer: Ranking & Personalization based in Spain. Join a collaborative, AI-driven environment where machine learning powers smarter e-commerce search, discovery, and shopping experiences. In this role, you will design, build, and maintain high-performance, real-time personalization services that reach hundreds of millions of users worldwide. You will work closely with engineers, data specialists, and business stakeholders to develop innovative solutions that improve product discovery and customer engagement. By leveraging user behavior, experimentation, and advanced machine learning techniques, you will help deliver more relevant shopping experiences. This is an opportunity to combine technical expertise, analytical thinking, and a strong sense of ownership while making a meaningful impact in a supportive, remote-first team. Accountabilities
- Design, develop, deploy, and maintain scalable, real-time machine learning services that power ranking and personalization across e-commerce products, platforms, and industry verticals.
- Analyze user interactions and behavioral data to build effective models that deliver more relevant and engaging customer experiences.
- Research, evaluate, and implement different personalization approaches to identify solutions that maximize customer value and business performance.
- Formulate and validate hypotheses through experimentation and A/B testing, measuring the impact of personalization improvements on key business metrics.




- Collaborate with engineering teams, including ranking specialists, as well as cross-functional technical and non-technical stakeholders to develop and continuously improve personalization features.
- Communicate findings, technical decisions, and business outcomes clearly to stakeholders, translating complex machine learning concepts into actionable insights.
- Take ownership of problems from investigation through implementation, continuously improving the reliability, scalability, and effectiveness of production systems.

Requirements:
- At least 3 years of professional experience in applied machine learning, with a strong understanding of how to develop and deploy ML solutions in real-world environments.
- Proficiency in Python, SQL, and big data technologies, with the ability to support end-to-end machine learning product development.
- Proven experience building, deploying, and maintaining production-grade personalization, recommendation, or ranking systems.
- Practical knowledge of designing and analyzing A/B tests and using experimental results to guide product and model improvements.
- Experience with a major public cloud platform is an advantage.
- Excellent English communication skills, with the ability to explain technical concepts and demonstrate business value to diverse stakeholders.
- A proactive, collaborative mindset, combined with empathy, accountability, and a genuine interest in delivering impactful machine learning solutions.

📌 Remote Machine Learning Engineer (España)
🏢 Jobgether
📍 España