Principal/Senior/Software Engineer (AgenticOS)

PubMatic, Pune, IN +1

The role

PubMatic is looking for engineers with expertise in Generative AI and AI agent development. You will be responsible for building and optimizing advanced AI agents that leverage the latest technologies in Retrieval-Augmented Generation (RAG), vector databases, and large language models (LLMs). You will work on developing state-of-the-art solutions that enhance Generative AI capabilities and enable our platform to handle complex information retrieval, contextual generation, and adaptive interactions.

Wait…

Lead the design, development, and deployment of AI-driven features. Drive end-to-end ownership—from feasibility analysis and design specifications to execution and release—while ensuring quick iterations based on customer feedback in a fast-paced Agile environment.
Spearhead technical design meetings and produce detailed design documents that outline scalable, secure, and robust AI architectures.
Ensure that the solutions are aligned with long-term product strategy and technical roadmaps.
Implement and optimize LLMs for specific use cases, including fine-tuning models, deploying pre-trained models, and evaluating their performance.
Develop AI agents powered by RAG systems, integrating external knowledge sources to improve the accuracy and relevance of generated content.
Design, implement, and optimize vector databases (e.g., FAISS, Pinecone, Weaviate) for efficient and scalable vector search, and work on various vector indexing algorithms.
Create sophisticated prompts and fine-tune them to improve the performance of LLMs in generating precise and contextually relevant responses.
Utilize evaluation frameworks and metrics (e.g., Evals) to assess and improve the performance of generative models and AI systems.
Work with data scientists, engineers, and product teams to integrate AI-driven capabilities into customer-facing products and internal tools.
Stay up to date with the latest research and trends in LLMs, RAG, and generative AI technologies to drive innovation in the company’s offerings.
Continuously monitor and optimize models to improve their performance, scalability, and cost efficiency.

We'd Love for You to Have

2 to 10 years of total experience and strong understanding of LLMs and their underlying principles — transformer architecture, attention mechanisms, and hyperparameter tuning.
Proven experience designing and building AI agents, including multi-agent orchestration, tool-use patterns, multi-step planning, and agent memory architectures (short-term and long-term).
Hands-on experience with agentic frameworks such as LangGraph, CrewAI, or AutoGen, and familiarity with RAG pipelines that integrate external knowledge sources (documents, databases, APIs).
In-depth knowledge of vector databases and indexing algorithms; practical experience with FAISS, Pinecone, Weaviate, or Milvus.
Experience with agent observability, tracing, and guardrails — tools like Langfuse or equivalent — to ensure reliability, safety, and debuggability of agentic systems.
Proficiency in prompt engineering – crafting, iterating, and optimizing complex prompts for context-sensitive, domain-specific LLM outputs.
Familiarity with Evals and other performance evaluation tools for measuring model quality, relevance, and efficiency.
Proficiency in Python and experience with machine learning libraries such as TensorFlow, PyTorch, and Hugging Face Transformers.
Experience with data preprocessing, vectorization, and handling large-scale datasets.
Ability to present complex technical ideas and results to both technical and non-technical stakeholders.

Principal/Senior/Software Engineer (AgenticOS)

The role

Principal/Senior/Software Engineer (AgenticOS)

The role

What you will do

We'd Love for You to Have

What you need

Additional Information

Nice to have

About PubMatic

Similar jobs at other companies

Lead AI Engineer - Generative AI & Agentic AI: Cogentiq

Senior AI Engineer

Senior Agentic AI Engineer

Senior GenAI Engineer

Manager - Senior AI/ML Engineer

Senior Associate – AI ML Engineer

Interview questions

PubMatic