Senior Machine Learning Engineer: ML Recall

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior Machine Learning Engineer: ML Recall based in Spain.

As part of the ML Recall team, you will help shape the retrieval layer of a large-scale e-commerce search engine used by hundreds of millions of shoppers worldwide.

You will build and improve retrieval systems that ensure relevant products are surfaced for queries across languages, markets, and domains.

Your work will span dense and sparse retrieval, query understanding, visual search, and multimodal solutions.

You will work with modern deep learning and transformer-based models, balancing relevance, generalization, and millisecond-level latency.

The role offers substantial room for research and experimentation, including testing new architectures and approaches on live traffic.

You will own models end to end, from problem definition and experimentation through deployment, A/B testing, and measurable impact.

You will join a highly technical, remote-first environment where your work directly influences search quality, user experience, and business performance.