senior machine learning Applied Scientist ic · Posted Feb 25, 2026

About this role

Amazon is hiring a senior-level Applied Scientist in the machine learning function based in Madrid, Spain. The posting calls out experience with Python, Java, LLMs, NLP.

Role
Applied Scientist
Function
machine learning
Level
senior
Track
Individual contributor
Employment
Full-time
Location
Madrid, Spain
Department
Applied Science
Posted
Feb 25, 2026
AI Summary
Senior Applied Scientist developing AI/NLP algorithms and agentic systems for book discovery at Amazon Books. Design scalable pipelines for knowledge base accuracy, mentor team members, and drive solutions from prototyping through production. Run experiments, analyze results, and communicate findings to stakeholders.

More roles at Amazon

Infrastructure Reliability Engineer, Infrastructure Reliability & Quality
Herndon, VA · mid
AWS Networking Machine Learning
Software Development Engineer, Amazon Ads Nova
New York City, NY · mid
Java C# AI Agents
Certified Pharmacy Technician, Fulfillment - Amazon Pharmacy
Miami, FL · mid
Delivery Consultant – SAP , Professional Services, SAP
New York City, NY · mid
Python Ruby AWS
MLA IP Design Verification Engineer, Annapurna Labs
Cupertino, CA · mid
Python AWS Machine Learning
All Amazon jobs →

Job description

from Amazon careers

Amazon is looking for creative Applied Scientists to tackle some of the most interesting problems in Artificial Intelligence (AI), natural language processing (NLP), knowledge graph curation, search, recommendation and related areas with our Amazon Books team. At Amazon Books we believe that reading is essential for a healthy society. As such, we aim to inspire readers by making it easy to read more and get more out of reading. We do this by creating an unmatched book discovery experience for our customers worldwide. We enable customers to discover new books, authors and genres through smart search tools, intelligent interactions and sophisticated recommendations, and we need your help to keep innovating in this space. If you are looking for an opportunity to solve deep technical problems and build innovative solutions in a fast-paced environment working within a smart and passionate team, this might be the role for you. You will develop and implement novel algorithms, agentic systems and modeling techniques to advance the state-of-the-art in technology areas at the intersection of AI, LLMs, NLP, search, and deep learning. You will innovate at scale, help move the needle for research in these exciting areas and build state-of-the-art technologies that enable delightful experiences…

This is an excerpt. Read the full job description on Amazon careers →
All machine learning jobs machine learning in Madrid, Spain Jobs in Madrid, Spain machine learning salaries machine learning career path
All Amazon Jobs Browse machine learning roles senior positions