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

PubMatic; Redwood City (CA); Hybrid; USD 200,000 - 229,000; Full time

Benefits offered by this job

Healthcare insurance

Dental insurance

Vision insurance

Disability insurance

Life insurance

Commuter benefits

Wellness programs

Unlimited DTO

Catered lunches

Job summary

PubMatic is seeking a Principal Software Engineer for the PubMatic AgenticOS to design and build scalable, ultra-low-latency real-time bidding systems for the buy-side. You will lead bidder services, craft pacing rules, and own core components from auction to delivery.

You will collaborate with ML, data and product teams to improve performance metrics across campaigns and ensure OpenRTB/VAST support, data governance and robust fault tolerance.

Qualifications

• Architect high-throughput, ultra-low-latency real-time bidding systems.
• Lead bidder services handling millions of QPS with strict latency SLAs.
• Design pacing, budget management, and delivery optimization algorithms.
• Own core systems for deal execution and auction participation.
• Collaborate with ML to productionize bid optimization models.
• Ensure OpenRTB, VAST, and programmatic ad workflows are supported.
• Mentor engineers and drive architectural decisions at scale.
• Foster data quality, governance, and security across the stack.

Responsibilities

• Architect high-throughput bidding systems for buy-side platforms.
• Develop bidder services with strict latency targets.
• Design pacing and delivery optimization algorithms.
• Build real-time data pipelines with Kafka, Flink, Spark.
• Work with ML teams to productionize models.

Skills

Golang

Real-time bidding

Low-latency systems

Performance advertising

Distributed systems

Education

Engineering degree

Tools

Kafka

Flink

Spark

OpenRTB

VAST

Docker

Kubernetes

Job description

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.

As a technical leader, you will own critical components of the bidding and optimization stack, influence system architecture, mentor senior and junior engineers, and work closely with product, ML, and data teams to drive measurable performance outcomes across large-scale advertising campaigns.

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.
• Collaborate closely with ML engineers to productionize models such as bid optimization, contextual bandits, reach forecasting, and incrementality models.
• Integrate and maintain support for programmatic advertising protocols (OpenRTB, VAST, CTV-specific standards).
• Drive architectural decisions around scalability, fault tolerance, data consistency, and latency optimization.
• Ensure data quality, governance, privacy, and compliance across the performance advertising stack.
• Conduct deep performance profiling, latency tuning, and debugging of distributed systems in production.
• Mentor engineers, set coding and design standards, and lead technical reviews across teams.
• Evaluate and introduce new technologies, auction strategies, and optimization frameworks to keep the platform competitive.

We'd Love for You to Have

• Eight plus years of software engineering experience, with significant depth in ad tech / performance advertising/Building DSP bidder (Buy side).
• Strong hands-on experience with Golang in building low-latency, high-scale backend systems.
• Proven experience designing and operating real-time bidding platforms, bidders, or ad serving systems.
• Deep understanding of campaign pacing, budget allocation, and performance optimization algorithms.
• Experience with streaming and distributed systems (Kafka, Flink, Spark Streaming).
• Strong familiarity with OpenRTB, VAST, and programmatic advertising workflows.
• Solid knowledge of SQL,PostgreSQL and large-scale analytics platforms (Snowflake, BigQuery, or similar).
• Experience with cloud platforms (AWS, GCP, or Azure) and containerized environments (Docker, Kubernetes).
• Strong foundation in data structures, algorithms, and distributed system design.
• Experience working cross-functionally with product, data science, analytics, and ML teams.
• Demonstrated ability to own systems end-to-end, influence architecture, and deliver at scale.
• Excellent communication skills with the ability to drive technical direction and mentor others.

Qualifications

• Should have a bachelor's degree in engineering (CS / IT) or equivalent degree from well-known Institutes / Universities.

Return to Office

PubMatic employees throughout the globe have returned to our offices via a hybrid work schedule (3 days "in office" and 2 days "working remotely") that is intended to maximize collaboration, innovation, and productivity among teams and across functions.

Benefits

Our benefits package includes the best of what leading organizations provide such as, paid leave programs, paid holidays, healthcare, dental and vision insurance, disability and life insurance, commuter benefits, physical and financial wellness programs, unlimited DTO in the US (that we actually require you to use!), reimbursement for mobile and fully stocked pantries plus in-office catered lunches 5 days per week.

Diversity and Inclusion

PubMatic is proud to be an equal opportunity employer; we don't just value diversity, we promote and celebrate it. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status

About PubMatic

PubMatic is one of the world's leading scaled digital advertising platforms, offering more transparent advertising solutions to publishers, media buyers, commerce companies and data owners, allowing them to harness the power and potential of the open internet to drive better business outcomes.

Founded in 2006 with the vision that data-driven decisioning would be the future of digital advertising, we enable content creators to run a more profitable advertising business, which in turn allows them to invest back into the multi-screen and multi-format content that consumers demand.

Compensation Disclosure

In accordance with applicable law, the below salary range provided is PubMatic's reasonable estimate of the total compensation for this role. New hires and current team members are typically compensated toward the middle of our pay range. The actual amount may vary, based on non-discriminatory factors such as location, experience, knowledge, skills and abilities. In addition to salary PubMatic also offers a bonus and a competitive benefits package.

Total Compensation Range

$200,000- $228,750 USD