Senior AI Scientist: LLMs, RAG & Agentic AI

RELX; Ciudad de México; Presencial; MXN 700.000 - 1.100.000; Jornada completa

Descripción de la vacante

LexisNexis Legal & Professional is seeking a Senior II Data Scientist to lead AI solutions using LLMs, RAG, and agentic AI. You will partner with product managers and domain experts to translate business needs into scalable, production-ready capabilities.

Responsibilities include end-to-end AI project lifecycles, performance monitoring, and collaborating across teams to solve information retrieval and NLP challenges while delivering high-quality results.

Formación

• 2 to 5 years of experience in Data Scientist or similar roles.
• At least 1 year of hands-on experience building RAG-based applications and agentic AI systems.
• Ability to design and explain end-to-end AI solution architectures, including data ingestion, retrieval, generation, and evaluation components.
• Strong proficiency in Python, modern AI frameworks (e.g., LangChain, Google ADK), cloud-based development, and software engineering best practices for production of AI systems.
• Experience working with NLP, document processing, search, recommendation systems, or related information retrieval problems.
• Familiarity with embeddings, vector search, and retrieval mechanisms.
• Ability to evaluate AI system performance and diagnose issues related to answer quality, retrieval, hallucinations, or model behavior.
• Experience implementing agentic workflows and multi-agent architectures.
• Proven ability to work closely with Product and stakeholders to understand business needs, gather requirements, and translate them into scalable AI solutions.
• Strong communication skills in English, including the ability to explain technical concepts to different audiences.

Responsabilidades

• Lead the end-to-end lifecycle of AI projects (LLMs, RAG architectures, agentic workflows)
• Monitor, evaluate and optimize AI system performance using metrics, user feedback, and experimentation frameworks
• Partner with product managers, domain experts, and stakeholders to prioritize opportunities while communicating results and tradeoffs
• Contribute directly to software development as an individual contributor
• Design and implement scalable AI solution architectures, including data ingestion, retrieval, generation, and evaluation components
• Build and enhance RAG-based applications and AI-powered products
• Collaborate across teams to identify and solve complex information retrieval and NLP challenges
• Support the continuous improvement of AI systems through experimentation, testing, and performance analysis

Conocimientos

Python

LangChain

Google ADK

Cloud-based development

NLP

Embeddings

Vector search

Agentic AI systems

Production AI systems

English communication

Descripción del empleo

LexisNexis Legal & Professional is seeking a Senior II Data Scientist to lead AI solutions using LLMs, RAG, and agentic AI. You will partner with product managers and domain experts to translate business needs into scalable, production-ready capabilities.

Responsibilities include end-to-end AI project lifecycles, performance monitoring, and collaborating across teams to solve information retrieval and NLP challenges while delivering high-quality results.