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Software Engineering Intern (Summer 2027)

Scale AI

San Francisco, CAOn-siteFull-time

About this role

<p>At Scale, our mission is to develop reliable AI systems for the world&39;s most important decisions. For 10 years, Scale has provided the high-quality data and full-stack technologies that power the world&39;s leading models, and has helped enterprises and governments build, deploy, and oversee AI applications that deliver real impact. We work closely with industry leaders like Meta, Ernst & Young, Mayo Clinic, Time Inc., the Government of Qatar, and U.S. government agencies including the Army and Air Force.</p> <p>Scale&39;s internship is not a side project. Interns own real, shipped work on the same roadmaps as full-time engineers, with mentorship from world-class talent and a culture that values ownership, speed, and truth-seeking. Many of our interns return as full-time Scaliens.</p> <h2><strong>Example Projects</strong></h2> <ul> <li>Build reinforcement learning and post-training data pipelines that power frontier model development</li> <li>Develop evaluation infrastructure that measures model reliability for enterprise and public sector customers</li> <li>Ship agentic AI applications and the tooling that makes them observable, testable, and safe to deploy</li> <li>Ship tools that accelerate the growth of new qualified contributors on Scale&39;s platform</li> <li>Build fraud-detection systems that remove bad actors and keep Scale&39;s contributor base safe and trusted</li> <li>Use models to estimate the quality of tasks and contributors, and guarantee quality on requests at large scale</li> <li>Devise advanced matching algorithms that pair contributors to customers for optimal turnaround and accuracy</li> <li>Create optimized and efficient UI/UX tooling, in combination with ML algorithms, for 100k+ contributors completing billions of complex tasks</li> <li>Develop new AI infrastructure produc

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