Senior Principal Software Engineer

About the Role:

PubMatic is looking for engineers who can design and implement next-generation, highly scalable and low-latency ad server features at scale of 200 billion+ requests per day in our AD Server. If you get excited building applications and architecture to handle 100's of billions of requests per day, managing millions of requests per second with a creative and fast-paced work environment, competitive pay, great incentives, culture of teamwork, smart and friendly colleagues and plenty of opportunity to grow in your career then you should consider applying for this position. 

What You'll Do:

• Lead a team of engineers at various levels with varied skills and experiences to solve complex problems, devise solutions, and motivate/mentor the team to reach the goals of a project / product. 
  • Develops a plan by which team members can reach the project goal. 
  • Seamlessly coordinates with engineering and Product Leads, understand the business needs and requirements of the Product/Platform. 
• Research, learn, design and build highly reliable, scalable and low latency platforms. 
  • Experience in development of highly scalable, reliable, low latency, distributed backend platforms and services. 
  • Do research of emerging technologies and prepare the POCs to evaluate them to enhance and upgrade our services. 
  • Understand the architecture and designs and come up with innovations and optimizations.  
  • Collaborate with other teams to Audit and Ensure the Stability of AdServer Platform. Timely review of the major designs, Arch changes by the AdServer Development Team. 
  • Collaborate with Data Center and DevOps teams for better planning of new Tech, Software Optimizations, Stability Improvements and other optimizations of the overall platform. 
• Use best practices for software development and documentation, assure designs meet requirements, and deliver high-quality work. 
  • Apply GenAI into various phases of Product Development. 
  • Demonstrate ownership, ability to self-direct, work independently and focus to deliver on time. 
  • Timely review of the major designs, Arch changes by the AdServer Development Team. 

We'd Love for You to Have:

• Ten plus years of development experience in C/C++, Linux/UNIX environment. Good to have experience with GO language. 
• Proficiency in the implementation of algorithms and the use of advanced data structures to solve problems in computing. A solid knowledge of the principles of computer science is desired. 
• Good experience in software design and architecture. 
• Good experience in building complex and scalable solutions. 
• Ability to find optimal solutions and innovative ideas. 
• Excellent problem-solving skills. 
• Being able to use generative AI-based tools and IDE for getting work done. 
• Understanding of different models at the basic level. 
• Prompt engineering basics. 
• Knowledge of OS and working experience on system programming (multi-threading, multi-processing, memory management). 
• Troubleshoot any issues with existing features, live on production. 
• Ability to write clean, modular and loosely coupled code. 
• Ability to understand end-to-end product functionality. 
• Working knowledge of scripting Perl/Python/Shell. 
• Working experience in databases, preferably MySQL. 
• Excellent interpersonal, written, and verbal communication skills.
• Proficiency in AI-assisted coding, automation, prompt engineering, and an understanding of the strengths and limitations of LLM-generated code is a strong plus

AI-Enabled Engineering Mindset

We value engineers who actively leverage Generative AI tools and IDEs (e.g. GitHub Copilot, ChatGPT, Claude, Cursor, Windsurf etc.) to accelerate development, improve code quality, automate repetitive tasks, and enhance documentation and debugging workflows. Engineers who demonstrate AI-first thinking using these tools to drive faster experimentation, ideation, and technical execution will thrive in our high-scale, performance-critical environment.

Qualifications:

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

Additional Information

Return to Office: PubMatic employees throughout the global 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 paternity/maternity leave, healthcare insurance, broadband reimbursement. As well, when we're back in the office, we all benefit from a kitchen loaded with healthy snacks and drinks and catered lunches and much more

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.