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# Machine Learning Engineer II, Responsible AI

- **Company:** Pinterest
- **Location:** San Francisco, CA, United States
- **Experience:** Experienced
- **Salary:** $138,905.0 - $285,982.0
- **Contract:** Permanent contract
- **Skills:** Artificial Intelligence, Data Analysis, Content Analysis, Cursor, Software Debugging, Machine Learning, Productivity Software, Recommender Systems, Microsoft Copilot, SQL Databases, Large Language Models, Generative AI, AI Coding Agents, Code Restructuring
- **Published:** October 27, 2026
- **Apply:** https://www.careerbuilder.com/job-details/machine-learning-engineer-ii-responsible-ai-san-francisco-ca--157167d8-0219-4544-9d17-5bc945384b0a

## About the Role

Machine Learning, Artificial Intelligence (AI), Power Amplifier, Artificial Intelligence (AI), Use Cases, Machine Learning, Conferences, Product Engineering, Content Ranking, Algorithms, * Extensive, real-world experience applying advanced ML methods to production systems, with a strong track record in responsible technology - spanning fairness, ethics, and broader societal considerations.

 * Deep familiarity with cutting-edge ML architectures (e.g., transformer-based models, 2-tower architectures, LLMs) and their applications in large-scale Search and Recommender Systems.
 * Proven ability to measure, deploy, and refine fairness interventions and broader Responsible AI solutions at scale, bridging state-of-the-art research with tangible product impact.
 * 2+ years working experience in the engineering teams that build large-scale ML-driven user-facing products
 * Masters or PhD in Comp Sci or related fields

Nice to have:

 * Publications at top ML conferences
 * 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
 * Expertise in scalable realtime systems that process stream data
 * Passion for applied research and the Pinterest product

## Description

Pinterest is known for being a positive and inspirational place on the internet and we believe that inspiration begins with representation and belonging. The Responsible AI team is a horizontal team that collaborates across the company on various initiatives. These range from Generative AI alignment, evaluation, and mitigations - ensuring these models are safe, bias-free, and aligned with Pinterest's vision and policies - to championing ML Fairness and developing user-facing features that enhance our product for all users. This includes launching groundbreaking features such as user-controllable skin tone, hair pattern search refinements, and more recently, body type.

You'll help shape forward-thinking projects, develop advanced ML approaches rooted in fairness and equitability, and pioneer responsible AI safeguards for emerging technologies. By joining this team, you'll make a lasting impact on our Pinners, our business, and the evolution of ethical AI at Pinterest.

What you''ll do:

 * execute on projects in the responsible AI frontier, to identify, avoid, and mitigate bias across a wide range of ML applications at Pinterest including generative AI.
 * Collaborate with other engineering teams (trust and safety, user modeling, content understanding,) to leverage their platforms and signals and work with them to collaborate on the adoption and evaluation of Responsible AI practices and ML Fairness tooling across Pinterest.
 * Mentor junior engineers on the Responsible AI team and across the company on the R-AI space.
 * Work with the team and senior leaders at the company to define and drive technical strategy in this area.