Sr. Data Scientist

LexisNexis Risk Solutions; Chennai District; On-site; INR 4,000,000 - 7,000,000; Full time

Benefits offered by this job

Health Insurance

Flexible Working Arrangement

Paid Time Off

Job summary

LexisNexis Risk Solutions seeks a Senior Data Scientist to design, develop, and deploy advanced AI and GenAI solutions, including RAG pipelines and LLM fine-tuning, for business delivery projects.

You will build scalable ML pipelines in Python, work with various data sources, and collaborate with Engineering, Product, and SMEs to deliver AI-powered features. Strong production ML experience and ML tooling are required.

Qualifications

• 6–8 years of relevant experience.
• Proficiency in Python and ML/NLP.
• Experience with Generative AI, LLMs, and prompt engineering.
• Knowledge of RAG architecture and vector search.
• Experience in building and evaluating ML models in production.
• Familiarity with LangChain/LlamaIndex or similar frameworks.
• Experience with ML deployment and MLOps.
• Exposure to cloud platforms (AWS/Azure/GCP).
• Nice to have experience in legal, regulatory, or publishing domains.

Responsibilities

• Design, develop, and deploy ML and GenAI solutions in production.
• Build and optimize RAG pipelines for retrieval-augmented generation.
• Fine-tune and evaluate LLMs and embeddings.
• Develop prompt engineering strategies and evaluation frameworks.
• Implement scalable ML pipelines using Python.
• Work with structured and unstructured data sources.
• Collaborate with Engineering, Product, and SMEs to deliver AI features.
• Monitor model performance, drift, and reliability in production.
• Conduct experimentation, A/B testing, and benchmarking.

Skills

Python

ML/NLP

GenAI

RAG

LLM Prompting

Vector Search

Model Evaluation

MLOps

Multi-agent frameworks

Tools

LangChain/LlamaIndex

Scikit-learn

XGBoost

LightGBM

PyTorch/TensorFlow

HuggingFace

OpenAI APIs

LLM APIs

Pinecone/Faiss/Weaviate/OpenSearch

Job description

About The Role

The Sr. Data Scientist to work on complex project involving AI, GenAI, RAG and Agentic Solution for the business delivery projects.

Responsibilities

• Design, develop, and deploy machine learning and GenAI solutions in production environments
• Build and optimize Retrieval-Augmented Generation (RAG) pipelines
• Fine-tune and evaluate Large Language Models (LLMs)
• Develop prompt engineering strategies and evaluation frameworks
• Implement scalable ML pipelines using Python
• Work with structured and unstructured data sources
• Collaborate with Engineering, Product, and SMEs to deliver AI-driven features
• Monitor model performance, drift, and reliability in production
• Conduct experimentation, A/B testing, and performance benchmarking
• Contribute to architecture design for AI-powered systems

Requirements

• Experience: 6–8 Years
• Core Stack Python (advanced proficiency)
• Machine Learning (supervised/unsupervised learning, NLP)
• Generative AI (LLMs, prompt engineering, embeddings)
• RAG architecture and vector search
• Model evaluation and validation frameworks
• ML & AI Tools LangChain / LlamaIndex (or similar frameworks) Scikit-learn / XGBoost / LightGBM PyTorch / TensorFlow HuggingFace / OpenAI / LLM APIs Vector databases (Pinecone, FAISS, Weaviate, OpenSearch, etc.)
• Data & Infrastructure SQL and data querying
• Experience with AWS / Azure / GCP
• CI/CD for ML deployments
• Model tracking tools (MLflow preferred)
• Good to Have Experience in legal, regulatory, or publishing domains
• Experience with model monitoring and MLOps
• Knowledge of fine-tuning techniques (LoRA, PEFT, QLoRA)
• Experience with multi-agent frameworks (AutoGen, LangGraph, etc.)

Benefits

• We know your well-being and happiness are key to a long and successful career.
• Comprehensive Health Insurance: Covers you, your immediate family, and parents.
• Enhanced Health Insurance Options: Competitive rates negotiated by the company.
• Group Life Insurance: Ensuring financial security for your loved ones.
• Group Accident Insurance: Extra protection for accidental death and permanent disablement.
• Flexible Working Arrangement: Achieve a harmonious work-life balance.
• Employee Assistance Program: Access support for personal and work-related challenges.
• Medical Screening: Your well-being is a top priority.
• Modern Family Benefits: Maternity, paternity, and adoption support.
• Long-Service Awards: Recognizing dedication and commitment.
• New Baby Gift: Celebrating the joy of parenthood.
• Subsidized Meals in Chennai: Enjoy delicious meals at discounted rates.
• Various Paid Time Off: Take time off with Casual Leave, Sick Leave, Privilege Leave, Compassionate Leave, Special Sick Leave, and Gazetted Public Holidays.
• Free Transport pick up and drop from the home -office - home (applies in Chennai)

We are committed to providing a fair and accessible hiring process.

Equal Opportunity Statement

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. USA Job Seekers: EEO Know Your Rights.

LexisNexis Legal & Professional is a leading global provider of legal, regulatory and business information and analytics that help customers increase productivity, improve decision-making and outcomes, and advance the rule of law around the world. We help lawyers win cases, manage their work more efficiently, serve their clients better and grow their practices. We assist corporations in better understanding their markets and preventing bribery and corruption within their supply chains. We partner with leading global associations and customers to help collect evidence against war criminals and provide tools to combat human trafficking. We endeavour to advance the rule of law across the world by combining unparalleled legal and business information with analytics and technology to advance what’s possible for the way we customers work and to advance what’s possible in the world by strengthening the rule of law.