Jobs Companies RELX Sr. Data Scientist

About this Sr. Data Scientist role at RELX

RELX · Onsite · Chennai

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.){Empty}

Working for you:

We know that your wellbeing and happiness are key to a long and successful career. These are some of the benefits we are delighted to offer:

  • 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 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.

We are committed to providing a fair and accessible hiring process. If you have a disability or other need that requires accommodation or adjustment, please let us know by completing our Applicant Request Support Form or please contact 1-855-833-5120.

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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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About RELX

RELX is a global provider of information-based analytics and decision tools for professional and business customers, enabling them to make better decisions, get better results and be more productive. Our purpose is to benefit society by developing products that help researchers advance scientific knowledge; doctors and nurses improve the lives of patients; lawyers promote the rule of law and achieve justice and fair results for their clients; businesses and governments prevent fraud; consumers access financial services and get fair prices on insurance; and customers learn about markets and complete transactions. Our purpose guides our actions beyond the products that we develop. It defines u

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