Senior AI Scientist — NLP, LLMs & RAG for Discovery

Elsevier; Philadelphia (Philadelphia County); On-site; MXN 1,959,000 - 3,264,000; Full time

Job summary

Elsevier is seeking a Senior Data Scientist to design and deliver advanced AI, NLP, and generative AI solutions that power knowledge discovery. You will work with complex scientific data, applying modern ML and LLM-based approaches to build scalable, reliable systems with real user impact.

You will collaborate across teams to turn complex challenges into practical, production-ready solutions, mentor teammates, and write production-grade Python code for deployment at scale while ensuring quality

Qualifications

• Practical experience in data science, AI, machine learning, NLP, information retrieval, or a related quantitative field.
• Strong hands-on experience building AI/ML, NLP, generative AI, and retrieval-based systems in applied or product-focused environments.
• Expertise working with LLMs, including fine-tuning, prompt engineering, grounding strategies, and responsible AI practices.

Responsibilities

• Design, build, and evaluate advanced AI/ML, NLP, and generative AI solutions for scientific and knowledge-discovery applications.
• Develop LLM-powered workflows and retrieval-augmented generation (RAG) systems for search, summarization, question answering, and evidence-grounded insight generation.
• Build intelligent retrieval, ranking, recommendation, and decision-support capabilities using modern orchestration frameworks and AI techniques.
• Integrate scientific metadata, ontologies, taxonomies, and knowledge assets into scalable AI workflows.
• Establish robust evaluation, experimentation, and monitoring frameworks to ensure quality, trust, performance, and reliability.
• Write production-ready Python code and partner with engineering teams to deploy solutions at scale.
• Provide technical leadership and mentoring to support high-quality delivery and continuous improvement.

Skills

Data science

AI/ML

NLP

LLMs

Python

Information retrieval

RAG

Cloud platforms

Job description

Elsevier is seeking a Senior Data Scientist to design and deliver advanced AI, NLP, and generative AI solutions that power knowledge discovery. You will work with complex scientific data, applying modern ML and LLM-based approaches to build scalable, reliable systems with real user impact.

You will collaborate across teams to turn complex challenges into practical, production-ready solutions, mentor teammates, and write production-grade Python code for deployment at scale while ensuring quality