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Senior Data Scientist

On-site India

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

Source: the employer's careers page. Last checked 2026-10-18. Posted 2026-10-16.

Applications happen on HCLTech's own site. View role and apply

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