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Machine Learning Engineer – NLP, RAG & Generative AI

Molecular Connections

2 - 5 years

Bengaluru

Posted: 08/01/2026

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Job Description

Role Overview

We are looking for a Machine Learning Engineer (3+ years) to build production-grade NLP systems, optimized search engines, RAG pipelines, and AI-driven automation using both traditional Machine Learning and Generative AI.

This role requires hands-on experience in applying vector embeddings, LLMs, and Python-based systems to solve complex, real-world business workflows efficiently and at scale.


Experience: 3+ Years



Key Responsibilities
  • Develop and optimize NLP/ML models (text classification, NER, domain-specific pipelines).
  • Build LLM-powered information extraction and document understanding systems.
  • Design vector embeddingbased systems for:
  • Semantic and hybrid search
  • Document similarity, clustering, and deduplication
  • Intelligent routing and workflow automation
  • Design and implement RAG pipelines , including:
  • Document chunking strategies
  • Embedding generation, retrieval, and ranking
  • Prompt construction with retrieved context
  • Build optimized search engines using hybrid approaches (keyword + vector search).
  • Work with vector databases (FAISS, Pinecone, Weaviate, Chroma, etc.).
  • Develop LLM-powered applications such as document chat, Q&A, summarization, and extraction.
  • Integrate multiple LLM providers (OpenAI, Azure OpenAI, Hugging Face).
  • Optimize token usage, latency, and cost in LLM-based systems.
  • Build AI agents and intelligent automation workflows using LLMs, embeddings, and decision logic.
  • Develop scalable Python APIs and services and support production deployments.
Required Skills & Experience
  • 3+ years of experience in Machine Learning, NLP, and Python development .
  • Strong understanding of ML fundamentals and evaluation techniques .
  • Hands-on experience with:
  • scikit-learn, PyTorch or TensorFlow
  • spaCy / NLTK / Hugging Face
  • Practical experience with:
  • Vector embeddings and semantic similarity
  • RAG architectures
  • Hybrid search systems (keyword + vector)
  • Experience working with vector databases .
  • Hands-on experience with LangChain, LangGraph, LlamaIndex, or AutoGen .
  • Experience building LLM-powered information extraction systems.
  • Experience optimizing LLM prompts, token usage, latency, and cost .
  • Experience handling domain-specific or scientific text data .
  • Strong problem-solving and production-oriented mindset.
Good to Have
  • Familiarity with Agentic AI architectures .
  • Experience with cloud platforms (AWS / Azure / GCP).
  • Exposure to Docker, CI/CD, and model monitoring .

  • Why Join Us?
    • Build real, production-scale GenAI systems
    • Work across traditional ML, RAG, and agentic AI
    • Design optimized, cost-aware AI architectures
    • Clear growth path into senior and technical leadership roles

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