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# Senior Machine Learning Engineer: Ml Recall

- **Company:** Jobgether
- **Location:** Madrid, Spain (Remote available)
- **Salary:** €80,000.0 - €120,000.0
- **Contract:** Permanent contract
- **Skills:** A/B Testing, Amazon Web Services, Microsoft Azure, Big Data, C++ (Programming Language), Distributed Data Store, Python (Programming Language), Machine Learning, MySQL, Performance Tuning, SQL Databases, Pytorch, Large Language Models, Apache Spark, Deep Learning, Pyspark, Data Analytics, Machine Learning Operations
- **Published:** September 10, 2026
- **Apply:** https://www.buscojobs.com.es/senior-machine-learning-engineer-ml-recall-en-madrid-ID-369949013

## About the Role

Requirements 3+ years of professional experience in applied machine learning with a proven track record of delivering production-grade ML systems.
Strong expertise in NLP, particularly transformer-based models, along with solid understanding of classical machine learning techniques.
Advanced Python skills and hands-on experience with deep learning frameworks (PyTorch preferred).
Strong experience with SQL (e.G., SparkSQL, MySQL or similar) and working knowledge of large-scale data processing systems such as PySpark.
Ability to translate business problems into data-driven hypotheses and implement scalable engineering solutions with measurable impact.
Strong problem-solving mindset, proactivity, and ownership-oriented approach to technical challenges.
Excellent collaboration and communication skills, with the ability to explain complex ML concepts clearly and work effectively in team environments.
Nice to have: experience with A/B testing, cloud platforms (AWS/GCP/Azure), Rust or C/C++, strong algorithmic thinking, and interest in performance optimization.
Benefits Fully remote work setup, allowing you to choose your location.

## Description

This role sits at the core of a next-generation ecommerce search and discovery platform that operates at massive global scale.You will be responsible for building and optimizing machine learning systems that directly impact relevance, recall, and business-critical outcomes such as conversion and revenue.Working on transformer-based and multimodal models, you will help shape how users discover products across search, recommendations, and visual shopping experiences.The environment is highly technical and innovation-driven, with a strong emphasis on production-grade ML systems and measurable impact.You will collaborate with engineers across distributed teams to push the boundaries of LLMs, deep learning, and large-scale data systems.This is an opportunity to work on one of the most advanced AI-driven ecommerce search infrastructures in the industry.Accountabilities Design, build, and deploy robust machine learning systems for search and discovery, including NLP, image-based, and multimodal models that improve recall and relevance.Develop and optimize ML/DL models using transformer architectures and LLM techniques to enhance system performance and business KPIs.Translate research ideas and hypotheses into production-ready engineering solutions that improve search quality, ranking, and user experience.Work on large-scale distributed data pipelines and ML workflows using big data technologies to support end-to-end model development and deployment.Collaborate closely with cross-functional engineering teams to integrate models into broader platforms and ensure system scalability and reliability.Conduct performance optimization and iterative experimentation to continuously improve model efficiency and business impact.Requirements 3+ years of professional experience in applied machine learning with a proven track record of delivering production-grade ML systems.Strong expertise in NLP, particularly transformer-based models, along with solid understanding of classical machine learning techniques.Advanced Python skills and hands-on experience with deep learning frameworks (PyTorch preferred).Strong experience with SQL (e.G., SparkSQL, MySQL or similar) and working knowledge of large-scale data processing systems such as PySpark.Ability to translate business problems into data-driven hypotheses and implement scalable engineering solutions with measurable impact.Strong problem-solving mindset, proactivity, and ownership-oriented approach to technical challenges.Excellent collaboration and communication skills, with the ability to explain complex ML concepts clearly and work effectively in team environments.Nice to have: experience with A/B testing, cloud platforms (AWS/GCP/Azure), Rust or C/C++, strong algorithmic thinking, and interest in performance optimization.Benefits Fully remote work setup, allowing you to choose your location.Unlimited vacation policy with encouragement to take at least 3 weeks off annually.Home office stipend to support your remote work environment.Company-provided Apple laptop for all new employees.Annual learning and development budget for continuous professional growth.Paid maternity and paternity leave for eligible employees.Stock options in addition to a competitive base salary.Regular team offsites to foster collaboration and connection.Opportunity to work with highly skilled peers on impactful, large-scale AI systems.Base salary range: $80,000 - $120,000 USD depending on experience and performance.#J-*****-Ljbffr


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