# Principal Machine Learning Engineer, Ads Delivery

**Company:** [Pinterest](https://hotfix.jobs/companies/pinterest)
**Location:** San Francisco, CA, Palo Alto, CA, Seattle, WA
**Role:** ML Engineering
**Salary:** $315k – $551k/yr
**Experience:** 10+ years
**Skills:** Machine Learning, Statistical Models, Backend Systems, Auction Mechanism Design, Computational Advertising, Software Engineering, Statistical Methods, E-Commerce Systems, Experiment Design, Marketplace Dynamics
**Posted:** 2026-02-11

> Develop backend systems, statistical models, and experiments to optimize Pinterest's ads marketplace, balancing short- and long-term objectives. Requires 10+ years experience, CS/ML degree, and strong engineering/math skills.

## Job Description

## 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.

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