Senior Data Scientist

Job Description

Senior Data Scientist

Bengaluru, Karnataka

Job Summary

This role demand strong GenAI experience, emerging mastery in Agentic AI Systems, and a good foundation in classical ML.

You will design and build intelligent, tool-using agents, multi-agent systems, RAG pipelines, and LLM-based applications leveraging the LangChain , LangGraph ecosystem, LangSmith for evaluation.

Key Responsibilities

This role demand strong GenAI experience, emerging mastery in Agentic AI Systems, and a good foundation in classical ML.

You will design and build intelligent, tool-using agents, multi-agent systems, RAG pipelines, and LLM-based applications leveraging the LangChain , LangGraph ecosystem, LangSmith for evaluation.

Key Responsibilities

1. GenAI / LLM Application Development

• Build GenAI applications using:
• LangChain, LangGraph
• Implement RAG architectures with:
• Retrieval, reranking, chunking, memory strategies
• Vector DBs (faiss, aisearch, opensearch, PG vector etc).
• Design prompt-engineering strategies:
• Instruction-following
• ReAct (Reasoning + Acting)
• Chain-of-thought structuring
• Self-reflection and planning loops
• Evaluation Strategy
• Implement evaluation frameworks for Classical ML and GenAI systems, covering statistical validation, reliability, and robustness.
• Assess LLM outputs, RAG pipelines, and agent workflows for grounding quality, relevance, and retrieval accuracy (e.g., recall@k, precision@k).
• Use LangSmith for tracing, automated evaluations, regression testing, and continuous system‑level quality monitoring

2. Agentic System Architecture

• Build agentic workflows:
• Tool-calling agents
• Planner-executor systems
• Multi-agent communication systems
• Hierarchical agent architectures
• Deep Agents
• Integrate memory systems:
• episodic memory
• semantic memory
• vector-based long-term knowledge
• Implement evaluation frameworks for agentic systems using LangSmith.

3. Model Context Protocol (MCP) & Tooling

• Implement MCP servers for external tool connectivity.
• Build tools that allow agents to interact with:
• APIs
• Code execution environments
• Knowledge bases
• Company applications

4. Classical ML (Foundational DS Skills)

• Apply ML models to structured/unstructured data.
• Conduct feature engineering, model selection, hyperparameter tuning.
• Build interpretable models where required.

5. Engineering & Integration

• Collaborate with backend engineering teams to seamlessly integrate agentic and GenAI systems into production applications.
• Implement observability, tracing, and monitoring for GenAI workflows using LangSmith to ensure reliability and system‑level transparency.

6. Cloud ML-Ops & Quality

• ML Modelling, data drift, concept drift, model quality monitoring.
• Hands‑on experience across AWS/ Azure/ Databricks, with flexibility to work on any cloud platform.
• Adhere to stringent quality assurance and documentation standards using version control and code repositories (e.g., Git, GitHub, Markdown)

Skill Requirements

Required Skills & Experience

• 5-10 years total experience, with 2-4+ years hands-on GenAI.
• Hands-on expertise with:
• LangChain, LangGraph
• LangSmith (tracing, metrics, evaluations)
• MCP tooling and agent tool integration
• ReAct, Tree of Thoughts, multi-agent orchestration
• RAG patterns and vector databases
• Strong coding expertise in Python.
• Classical ML foundations (tree models, regression, etc.).
• Experience working with LLM APIs and/or open-source LLMs.
• Experience building and debugging production-quality GenAI pipelines.
• Aws/azure
• GIT Ops
• Prior experience building complex multi-agent systems for real-world applications.
• Knowledge of multi-modal LLMs (vision, speech, code).
• Familiarity with structured evaluation of LLM systems (hallucination tests, safety assessments etc ).
• Experience in enterprise-grade LLM deployments.

Other Requirements

BE or Equivalent degree

Apply now

Information at a Glance

Why HCLTech?

At HCLTech, youll supercharge your potential. Youll find your career. And youll find your spark. All at a place that knows that helping its customers stay on top starts by putting its people first.

HCLTech is a global technology company, home to more than 223,000 people across 60 countries, delivering industry-leading capabilities centered around digital, engineering, cloud and AI, powered by a broad portfolio of technology services and products. We work with clients across all major verticals, providing industry solutions for Financial Services, Manufacturing, Life Sciences and Healthcare, Technology and Services, Telecom and Media, Retail and CPG, and Public Services. Consolidated revenues as of 12 months ending June 2026 totaled $14.8 billion.