Overview

About the Role:

We are looking for a Senior AI Engineer to join our AI Center of Excellence team at Epsilon, working at the heart of enterprise-grade Conversational, Agentic, and AI Platforms and applications. This role is for someone who brings a robust software engineering backbone, a data-oriented mindset, and deep hands-on expertise in Generative AI, RAG, and Agentic AI systems and is ready to help shape the future of intelligent, enterprise systems at scale.

You will be building and scaling AI-powered applications and agents that serve thousands of associates and clients across Epsilon and Publicis Groupe, integrating with enterprise systems. You will own and operate across the full lifecycle - from ideation, experimentation and prototyping to production hardening, evaluation, and operational governance.

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Responsibilities

What You'll Do:

Core Engineering & Architecture

• Design, develop, and ship production-grade AI applications - including conversational Assistants,



RAG pipelines, and multi-agent systems.
• Architect scalable, secure, and cost-efficient backend services using Python, Node.js, and cloud-native patterns (AWS / Azure/ GCP).
• Build and maintain API services (RESTful, streaming) that integrate AI capabilities with enterprise systems.
• Write clean, testable, well-documented code with CI/CD best practices; champion engineering rigor in an AI-first team.

Generative AI & LLM Systems

• Build and optimize LLM-powered features - including prompt engineering, structured output design, tool/function calling, and context management (multi-turn conversations, session handling).
• Design and implement evaluation frameworks (groundedness scoring, regression testing, quality benchmarking) for AI outputs - ensuring trust, accuracy, and continuous improvement.
• Stay hands-on with LLM APIs (Azure OpenAI, AWS Bedrock, Anthropic, open-source models) and make in

📌 Senior Software Engineer (Bengaluru)
🏢 Epsilon
📍 Bengaluru