Lead Data Scientist- Gen AI-ML- Vice president

Citigroup Inc.; Chennai District; On-site; INR 3,500,000 - 6,500,000; Full time

Job summary

Citi is seeking a Lead Gen AI/ML Data Scientist to join the Olympus Data Reconciliation and Engineering team in Chennai. You will drive the full ML lifecycle from ideation to deployment, shaping enterprise-scale AI capabilities across global processing hubs.

You will work with advanced models, supervise data workflows, and communicate insights to senior stakeholders, ensuring production-ready solutions and scalable analytics.

Qualifications

• 10+ years hands-on experience in Gen AI/ML development and big data engineering within Financial Services, Insurance, or Telecom environments.
• Expert-level proficiency in Python (scikit-learn, TensorFlow, PyTorch, Pandas, NumPy) and SQL.
• Deep technical knowledge implementing supervised and unsupervised ML algorithms and ensemble methods.
• Experience building and deploying Agentic AI and LLM-based solutions using LangGraph, LangChain, and ADK.

Responsibilities

• Design, build, and deploy AI/ML models to solve reconciliation and data engineering challenges at enterprise scale.
• Lead end-to-end ML model development lifecycle from requirements to production.
• Analyze large volumes of financial data to uncover trends and optimization opportunities across banking platforms.
• Define and deliver ML model roadmaps in collaboration with technical and business teams.
• Translate data findings into visualizations and strategic recommendations for senior leaders.
• Ensure seamless model integration and long-term scalability in production environments.
• Identify technology risks and mitigate with clear communication to stakeholders.
• Maintain model documentation and support knowledge transfer.

Skills

Gen AI/ML

Python

SQL

ML algorithms

Agentic AI

LangChain

ADK

LangGraph

LLM

Education

Bachelor’s or Master’s in CS/Data Science/SE/IS/Math/Statistics

Tools

Mlflow

Weights & Biases

DVC

Git

Plotly/Tableau/Power BI

Job description

About the Team:

Citi is looking for a Lead Gen AI/ML- Data Scientist to join the Olympus Data Reconciliation and Engineering team, where you will shape the next generation of AI and machine learning capabilities powering enterprise-scale reconciliation across global processing hubs.

In this role, you will drive the full lifecycle of ML model development — from ideation and architecture through to deployment and adoption — delivering measurable impact across Capital Markets operations, risk, and finance. Your work will sit at the intersection of advanced data science and real-world financial systems, influencing outcomes at a global scale.

Responsibilities:

• Design, build, and deploy AI and machine learning models — including Agentic AI and Generative AI solutions — to solve complex reconciliation and data engineering challenges at enterprise scale.

• Lead the end-to-end ML model development lifecycle, from requirements gathering and data preprocessing through to ensemble modeling, validation, and production integration.

• Analyze large volumes of structured and unstructured financial data to uncover trends, patterns, and opportunities for optimization across banking platforms.

• Define and deliver ML model roadmaps in collaboration with technical and business teams, ensuring alignment with project timelines, budgets, and Citi's architecture standards.

• Translate complex data findings into clear visualizations and strategic recommendations that inform decisions made by senior business and technology leaders.

• Partner with engineering, operations, and cross-functional teams to ensure seamless model integration, long-term scalability, and reliable performance in production environments.

• Identify and communicate technology risks and their business implications, developing mitigation strategies and maintaining transparency with stakeholders at all levels.

• Maintain comprehensive model documentation and support knowledge transfer to ensure continuity and adoption across teams.

Required Qualifications & Skills:

Technical Expertise:

• 10+ years hands-on experience in Gen AI/ML development and big data engineering within Financial Services, Insurance, or Telecom environments

• Expert-level proficiency inPython(scikit-learn, TensorFlow, PyTorch, Pandas, NumPy),andSQL

• Deep technical knowledge implementing supervised and unsupervised ML algorithms: linear/logistic regression, neural networks (CNN, RNN, LSTM, Transformers), k-means clustering, DBSCAN, decision trees (CART, C4.5), and ensemble methods (Random Forest, XGBoost, LightGBM, CatBoost)

• Proven experience building and deployingAgentic AIandLLM-based solutionsusing:

  • LangGraphfor complex agent orchestration and state management

  • LangChainfor chain-of-thought reasoning and retrieval-augmented generation (RAG)

  • Agent Development Kit (ADK)for enterprise-grade autonomous agent development

Beneficial Skills & Qualifications:

• Hands-on experience with advanced statistical modeling:Generalized Linear Models (GLM),Random Forest,Gradient Boosting(AdaBoost, XGBoost), andNatural Language Processing (NLP)techniques including text mining, topic modeling (LDA), and sentiment analysis

• Experience withmodel versioning and experiment tracking tools(Mlflow, Weights & Biases, DVC)

• Proficiency withGit/GitHub/Bitbucketfor version control and collaborative development

• Familiarity withdata visualization libraries(Matplotlib, Seaborn, Plotly) andBI tools(Tableau, Power BI)

• Experience withreal-time streaming dataframeworks (Kafka, Kinesis)

• Passion for staying current with emerging AI/ML frameworks, research papers, and open-source contributions

Education:

Bachelor’s or Master’s degree in Computer Science, Data Science, Software Engineering, Information Systems, Mathematics, Statistics or related fields of study.

Job Family Group:

Technology

Job Family:

Data Science

Time Type:

Full time

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