Principal Software Engineer - PubMatic AgenticOS (Buy Side Bidding Platform)

About the role

We are seeking an experienced Principal Software Engineer - PubMatic AgenticOS to lead the design and development of highly scalable, low-latency buy-side ad tech systems. This role is ideal for someone with deep expertise in Golang, real-time bidding systems, and campaign pacing and optimization algorithms, with strong exposure to DSP / performance advertising domains.

What you'll do

• Architect, design, and build high-throughput, ultra-low-latency real-time bidding systems for buy-side advertising platforms
• Lead development of bidder services handling millions of QPS with strict latency and reliability SLAs using Golang/C/C++
• Design and implement campaign pacing, budget management, and delivery optimization algorithms across multiple objectives (CPA, ROAS, CTR, CVR)
• Own core systems for deal execution, auction participation, bid shading, and supply path optimization
• Build and evolve real-time and near-real-time data pipelines for impressions, clicks, conversions, and attribution using Kafka, Flink, or Spark

What you need

• Data structures
• SQL
• System design
• Kafka
• C++
• PostgreSQL
• B.Tech or B.E.

Good to have

• AWS
• Docker
• Kubernetes
• Machine learning
• Spark
• ETL