Principal Software Engineer, ML & Media Infra

What you’ll do

• Set the technical vision and roadmap for model training and serving, with reusable interfaces to data and feature infrastructure.
• Lead architectures for distributed training, fine-tuning, distillation, evaluation, and high-scale CPU/GPU inference.
• Lead architectures for content acquisition, media ingestion and signal processing.
• Improve efficiency across data loading, distributed execution, GPU kernels and memory, compilation, quantization, scheduling, and capacity.
• Build reliable, observable platforms with strong quality guarantees and training/serving consistency.
• Partner with Ads and Core AI/ML teams to productionize features and models safely at Pinterest scale.
• Drive cross-organizational architecture decisions, migrations, and operational standards; mentor senior engineers and raise the engineering bar.
• Partner closely with Content, Shopping catalog and GenAI teams to improve Pinterest content ecosystem.
• Use AI-assisted development and analysis to accelerate prototyping, performance diagnosis, and validation while maintaining rigorous correctness and data safeguards.

What we’re looking for

• A track record of setting technical strategy and delivering company-wide infrastructure initiatives in ambiguous environments.
• Deep expertise in distributed ML systems, including production experience with both large-scale training and online inference.
• Strong GPU performance knowledge, such as profiling, distributed execution, kernel and memory optimization, compilation, or quantization.
• Experience with AI/ML modeling, recommender systems, Ads ranking, retrieval, feature platforms, or similarly demanding ML workloads.
• Experience with content acquisition e.g. crawler, content understanding, NRT data processing.
• Experience with search and recommendation system, ads serving system.
• Strong systems programming and design skills in C++, Java, or Python.
• High ownership and sound judgment in reliability, security, cost, and operational excellence.
• Demonstrated ability to use AI to improve speed and critically evaluate AI-assisted work, with accountability for correctness, quality, and sensitive data.
• Bachelor’s degree in Computer Science, Engineering, a related field, or equivalent experience.

Relocation Statement

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

In-Office Requirement Statement

• We recognize that the ideal environment for work is situational and may differ across departments. What this looks like day-to-day can vary based on the needs of each organization or role.
• This role will need to be in the office for in-person collaboration 1–2 times per quarter and therefore needs to be within a commutable distance of our Palo Alto, CA or San Francisco, CA office.

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Pay and benefits

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 $285,452—$449,541 USD

Our Commitment to Inclusion

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.