Lead AI Engineer

Posted 8 Days Ago
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Kharadi, Pune, Maharashtra, IND
In-Office
Senior level
AdTech • Marketing Tech
The Role
Lead development of generative and multimodal AI systems: design agentic workflows, build and fine-tune transformer models, implement hybrid retrieval and knowledge-graph solutions, deploy scalable model APIs on cloud, collaborate with cross-functional teams, and mentor junior engineers.
Summary Generated by Built In

Job Description:

AI Lead Engineer

Role Overview
 

We are seeking a Lead Generative AI Engineer with strong foundations in deep learning, transformer architecture, and practical experience building GenAI applications beyond basic RAG systems. The ideal candidate has hands-on experience/technical familiarity with LLM fine-tuning, multimodal models, retrieval systems, agentic frameworks, retrieval architectures, and production-grade ML deployment.
 

This role will partner with engineering, data science, and CX teams to build intelligent agents, multimodal experiences, personalization systems, and knowledge-grounded AI solutions that power the future of customer engagement for global brands.

Key ResponsibilitiesGenerative AI, Multimodal Systems & Agentic Frameworks
  • Build conversational and non-conversational, multimodal, and agentic AI applications using LLMs and frameworks such as LangChain, LangGraph, LlamaIndex, AutoGen, or similar.
  • Design AI workflows incorporating reasoning, planning, tool-use, memory, grounding, and external system integrations.
  • Develop Knowledge Graph (KG)-assisted AI systems, including entity extraction, linking, and KG-augmented retrieval.
  • Ensure safety, consistency, and hallucination-control through structured evaluation and guardrails.
Deployment, APIs & Cloud Engineering
  • Transform models into scalable APIs and microservices using Python, FastAPI/Flask, Docker.
  • Deploy and monitor ML/AI systems in AWS/Azure/GCP, optimizing for cost, latency, and reliability.
  • Collaborate with MLOps teams on CI/CD pipelines, model versioning, monitoring, and automated evaluation.
  • Work with big data technologies including Apache Spark, Hadoop, and NoSQL databases such as MongoDB.
Model Development & Applied AI Engineering
  • Build and optimize transformer-based and multimodal models using deep learning frameworks (e.g., PyTorch, TensorFlow).
  • Implement fine-tuning, alignment (RLHF/RLAIF), LoRA/QLoRA, pruning, and model evaluation pipelines.
  • Develop information retrieval systems, including hybrid dense–sparse retrieval, ranking, knowledge graphs, and relevance optimization.
  • Build predictive models and ML pipelines from scratch, including data preparation, feature engineering, and model selection.
Collaboration, Documentation & Mentorship
  • Work cross-functionally with CX, engineering, and product stakeholders to translate business needs into AI solutions.
  • Document models, experiments, evaluation frameworks, and deployment processes.
  • Mentor junior engineers and contribute to internal best practices, reusable components, and R&D initiatives.
Required Technical Skills
  • Programming: Python (advanced), SQL; robust experience with API development and data engineering,
  • Backend Frameworks: Flask, FASTAPI, Django
  • Machine Learning: Predictive modelling, deep learning, optimization, embeddings, vector search, model evaluation.
  • Generative AI: LLMs, RAG, multimodal architectures, agents, prompt engineering, grounding, knowledge graphs.
  • Cloud Platforms: AWS, Azure, or GCP with hands-on experience deploying and scaling AI systems.
  • Data Technologies: Apache Spark, Hadoop, MongoDB; strong understanding of data pipelines and large-scale processing.
  • Math Foundations: Linear algebra, probability, statistics.
Experience Requirements
  • Minimum 5-6 years of hands-on software development experience including building and deploying machine learning models into production.
  • 2+ years of experience working with deep learning, GenAI, or transformer-based architectures.
  • Demonstrated experience building GenAI applications beyond simple RAG (e.g., agents, multimodal, custom LLM fine-tuning).
  • Experience integrating AI systems in enterprise-grade environments.

Skill Category

Lead AI Engineer

Transformers & Deep Learning

Applies LoRA/QLoRA, distillation, debugging, optimization.

Generative AI (LLMs & Multimodal)

Builds tool-using pipelines, multilingual/multimodal flows.

Information Retrieval & Relevance

Implements hybrid retrieval + ranking, KG-enhanced semantic retrieval

Predictive Modeling

Builds and tunes end-to-end ML pipelines.

Knowledge Graphs

Builds KG pipelines (entity linking, embeddings).

Conversational AI

Multi-turn, multilingual dialogue systems with evaluation metrics.

Agentic Frameworks

Multi-step agent workflows with planning & memory.

Model Deployment

Scales services with CI/CD, monitoring, GPU/accelerator ops.

Cloud & MLOps

End-to-end model lifecycle automation.

Big Data & Pipelines

Uses Spark/Hadoop/MongoDB effectively.

Deep Learning

Understand and applied deep learning architectures – RNNs, LSTMs, Transformers

Attitude & Mindset
  • Growth-oriented, collaborative, and experimentation-driven.
  • Strong problem-solving skills with a bias toward action.
  • Ability to communicate complex concepts clearly to non-technical stakeholders.
  • Open and flexible towards a hybrid work structure with no less than 2-days work from office – This is to ensure that the team working in the AI domain regularly connects and does knowledge exchange across projects

Location:

DGS India - Pune - Kharadi EON Free Zone

Brand:

Merkle

Time Type:

Full time

Contract Type:

Permanent

Skills Required

  • Minimum 5-6 years of hands-on software development experience including production ML model deployment
  • 2+ years working with deep learning, generative AI, or transformer-based architectures
  • Advanced Python programming
  • SQL
  • Backend frameworks: Flask, FastAPI, Django
  • Deep learning frameworks: PyTorch and/or TensorFlow
  • Experience with LLM fine-tuning and techniques (LoRA, QLoRA, pruning, RLHF/RLAIF)
  • Experience building GenAI applications beyond simple RAG (agents, multimodal, custom fine-tuning)
  • Familiarity with agentic frameworks and libraries such as LangChain, LangGraph, LlamaIndex, AutoGen or similar
  • Experience building information retrieval systems: dense/sparse hybrid retrieval, ranking, vector search, embeddings
  • Knowledge graph experience: entity extraction, linking, KG-augmented retrieval
  • Cloud deployment experience on AWS, Azure, or GCP and production ML monitoring
  • Containerization and microservices: Docker; API deployment and monitoring (FastAPI/Flask)
  • Big data technologies: Apache Spark, Hadoop and NoSQL databases such as MongoDB
  • Strong math foundations: linear algebra, probability, statistics
  • Experience with CI/CD, model versioning, automated evaluation, and GPU/accelerator operations

dentsu Compensation & Benefits Highlights

The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about dentsu and has not been reviewed or approved by dentsu.

  • Parental & Family Support Paid parental leave at full pay and caregiver supports (including backup care) are emphasized as standout elements. Feedback suggests family-oriented benefits are a strong part of the package.
  • Leave & Time Off Breadth Flexible or unlimited PTO, extensive paid holidays, and a year-end office closure are established components. Feedback suggests time-off policies are generous and add meaningful flexibility.
  • Retirement Support A large, established 401(k) plan with employer matching is clearly documented. Feedback suggests retirement benefits feel competitive and straightforward.

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The Company
HQ: Minato
15,492 Employees

What We Do

We are dentsu. We team together to help brands predict and plan for disruptive future opportunities and create new paths to growth in the sustainable economy. We know people better than anyone else and we use those insights to connect brand, content, commerce and experience, underpinned by modern creativity. We are the network designed for what’s next

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