Senior Data Scientist II - Generative AI / RAG / Agentic AI

hackajob is collaborating with LexisNexis to connect them with exceptional professionals for this role.

Are you excited to shape the next generation of AI‑powered drafting and search experiences at scale?

Do you want to work on advanced Generative AI systems that turn complex information into clear, trusted insights?

About our Team

You will join a multidisciplinary team of data scientists, engineers, and product partners focused on building intelligent, reliable, and responsible AI solutions for legal and business professionals. We work collaboratively, value thoughtful experimentation, and prioritize high‑quality, production‑ready outcomes.

About the Role

As a

  Senior Data Scientist II

, you will design and improve

  Generative AI, Retrieval‑Augmented Generation (RAG), 

and

  agentic RAG systems

that power drafting, search, and reasoning use cases. You will focus on retrieval quality, evaluation, and production‑grade machine learning components, working closely with cross‑functional partners to deliver measurable improvements in relevance, accuracy, and user trust.

Responsibilities

• Design, build, and optimize  Generative AI, RAG , and  agentic RAG systems for drafting, search, and reasoning use cases
• Improve LLM ‑generated outputs through prompt design, retrieval optimization, evaluation, and experimentation
• Develop and maintain scalable data science and machine learning components for production environments
• Build and enhance retrieval pipelines, including query processing, document retrieval, ranking, reranking, and grounding strategies
• Apply text search and relevance tuning techniques using platforms such as OpenSearch and Solr
• Use embeddings, hybrid retrieval, semantic search, and reranking methods to improve answer quality and system performance
• Write high‑quality, maintainable, production‑ready Python code following strong software engineering practices
• Collaborate closely with partners across data science, engineering, product, and domain teams

Requirements

• Proven experience building and improving  Generative AI and LLM‑based solutions in production or near‑production settings
• Strong experience with  RAG frameworks , retrieval‑based AI architectures, and agentic workflows
• Advanced Python skills, including modular design, testing, debugging, and clean coding practices
• Strong understanding of information retrieval, text search methods, and retrieval architectures
• Hands‑on experience with  OpenSearch, Solr, or similar search platforms
• Experience with  embeddings, semantic retrieval, reranking , and relevance optimization
• Proven ability to work effectively in a monorepo environment with disciplined version control and code review practices
• Experience collaborating in cross‑functional teams and contributing to CI/CD and deployment workflows

Work in a Way That Works for You

We promote flexible ways of working that support collaboration, focus, and personal wellbeing, while meeting the needs of our teams and customers.

Working Pattern

This role supports flexible working arrangements, balancing individual productivity with team collaboration.

About the Business

You will be part of the LNLP division, within the Standard business unit, delivering trusted information and technology solutions that help professionals make confident decisions.

#AIFluent

U.S. National Base Pay Range: $104,900 - $174,700. Geographic differentials may apply in some locations to better reflect local market rates.

If performed in Maryland, the base pay range is $110,100 - $183,500.If performed in New York, the base pay range is $115,400 - $192,200.If performed in New York City, the base pay range is $125,900 - $209,700.If performed in Rochester, NY, the base pay range is $104,900 - $174,700.If performed in New Jersey, the base pay range is $123,816 - $197,784.

This job is eligible for an annual incentive bonus.

We know your well-being and happiness are key to a long and successful career. We are delighted to offer country specific benefits. Click here to access benefits specific to your location.

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We are an equal opportunity employer: qualified applicants are considered for and treated during employment without regard to race, color, creed, religion, sex, national origin, citizenship status, disability status, protected veteran status, age, marital status, sexual orientation, gender identity, genetic information, or any other characteristic protected by law.

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