Principal Machine Learning Engineer, Ads Delivery

pinterest· Monetization

📍 San Francisco, CA, US; Palo Alto, CA, US; Seattle, WA, US🗓 Posted Sep 23, 2025

About this role

About Pinterest:

Millions of people around the world come to our platform to find creative ideas, dream about new possibilities and plan for memories that will last a lifetime. At Pinterest, we’re on a mission to bring everyone the inspiration to create a life they love, and that starts with the people behind the product.

Discover a career where you ignite innovation for millions, transform passion into growth opportunities, celebrate each other’s unique experiences and embrace the flexibility to do your best work. Creating a career you love? It’s Possible.

At Pinterest, AI isn't just a feature, it's a powerful partner that augments our creativity and amplifies our impact, and we’re looking for candidates who are excited to be a part of that. To get a complete picture of your experience and abilities, we’ll explore your foundational skills and how you collaborate with AI.

Through our interview process, what matters most is that you can always explain your approach, showing us not just what you know, but how you think. You can read more about our AI interview philosophy and how we use AI in our recruiting process here.

Within the Ads Delivery team, we try to connect the dots between the aspirations of pinners and the products offered by our partners. In this role, you will be responsible for developing and executing a vision for the evolution of the Pinterest marketplace. You will design and implement systems that improve the ads delivery funnel, experiments that shape the utility function, auction mechanism design, ad allocation and for deriving new insights through analysis of the marketplace dynamics. In short, this is a unique position, where you’ll get the freedom to work to bring together pinners and partners in this unique marketplace.

What you’ll do:

Build and improve backend systems and statistical models that underlay the marketplace to maximize value for Pinners, Partners and Pinterest.
Define and implement experiments to understand long term Marketplace effects.
Develop strategies to balance long and short term business objectives.
Drive multi-functional collaboration with peers and partners across the company to improve knowledge of marketplace design and operations.

What we’re looking for:

Degree in Computer Science, Machine Learning, Statistics or related field.
10+ years of professional experience as a hands-on engineer and technical leader leading multiple projects.
Strong software engineering and mathematical skills with knowledge of statistical methods.
Hands-on experience with large-scale online e-commerce systems is a plus.
Background in computational advertising is preferred.
Nice to Have:
- Experience using Cursor, Copilot, Codex, or similar AI coding assistants for development, debugging, testing, and refactoring
- Familiarity with LLM-powered productivity tools for documentation search, experiment analysis, SQL/data exploration, and engineering workflow acceleration

In-Office Requirement Statement:

We let the type of work you do guide the collaboration style. That means we're not always working in an office, but we continue to gather for key moments of collaboration and connection.
This role will need to be in the office for in-person collaboration 1-2 times/month, and therefore needs to be in a commutable distance from one of the following offices: San Francisco, Palo Alto, Seattle.

Relocation Statement:

This position is not eligible for relocation assistance. Visit our PinFlex page to learn more about our working model.

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At Pinterest we believe the workplace should be equitable, inclusive, and inspiring for every employee. In an effort to provide greater transparency, we are sharing the base salary range for this position. The position is also eligible for equity. Final salary is based on a number of factors including location, travel, relevant prior experience, or particular skills and expertise.

Information regarding the culture at Pinterest and benefits available for this position can be found here.

US based applicants only

$314,580—$550,515 USD

Our Commitment to Inclusion:

Pinterest is an equal opportunity employer and makes employment decisions on the basis of merit. We want to have the best qualified people in every job. All qualified applicants will receive consideration for employment without regard to race, color, ancestry, national origin, religion or religious creed, sex (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender, gender identity, gender expression, age, marital status, status as a protected veteran, physical or mental disability, medical condition, genetic information or characteristics (or those of a family member) or any other consideration made unlawful by applicable federal, state or local laws. We also consider qualified applicants regardless of criminal histories, consistent with legal requirements. If you require a medical or religious accommodation during the job application process, please complete this form for support.

By submitting this application, I certify that all information submitted in my application and throughout the hiring process is true, accurate, and complete to the best of my knowledge. I understand that any false statement, omission, or misrepresentation may disqualify me from employment consideration or result in termination if discovered after hire.

Frequently Asked Questions

Is the salary disclosed for the Principal Machine Learning Engineer, Ads Delivery position at pinterest?

The salary for this Principal Machine Learning Engineer, Ads Delivery role at pinterest is not publicly listed. Click "Apply Now" to learn more about the compensation package on their official careers page.

Where is the Principal Machine Learning Engineer, Ads Delivery position at pinterest located?

This Principal Machine Learning Engineer, Ads Delivery role at pinterest is based in San Francisco, CA, US; Palo Alto, CA, US; Seattle, WA, US. The position is listed as on-site or hybrid. Check the full job description or apply directly to confirm the work arrangement.

Which team or department does the Principal Machine Learning Engineer, Ads Delivery at pinterest belong to?

This Principal Machine Learning Engineer, Ads Delivery position is part of the Monetization department at pinterest. See the full job description for more information about the team structure and responsibilities.

How do I apply for the Principal Machine Learning Engineer, Ads Delivery position at pinterest?

Click the "Apply Now" button on this page. You will be redirected to pinterest's official application portal hosted on greenhouse where you can submit your application directly.

When was the Principal Machine Learning Engineer, Ads Delivery job at pinterest posted?

This Principal Machine Learning Engineer, Ads Delivery position at pinterest was posted on Sep 23, 2025. Apply as soon as possible — early applications are often reviewed first.

Principal Machine Learning Engineer, Ads Delivery

Apply for this role ↗

You'll be redirected to pinterest's official application page on Greenhouse.