Software Engineering Intern (Summer 2027)

At Scale our mission is to develop reliable AI systems for the worlds most important decisions. For 10 years Scale has provided the high-quality data and full-stack technologies that power the worlds 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.

Scales 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.

• Build reinforcement learning and post-training data pipelines that power frontier model development
• Develop evaluation infrastructure that measures model reliability for enterprise and public sector customers
• Ship agentic AI applications and the tooling that makes them observable testable and safe to deploy
• Ship tools that accelerate the growth of new qualified contributors on Scales platform
• Build fraud-detection systems that remove bad actors and keep Scales contributor base safe and trusted
• Use models to estimate the quality of tasks and contributors and guarantee quality on requests at large scale
• Devise advanced matching algorithms that pair contributors to customers for optimal turnaround and accuracy
• Create optimized and efficient UI/UX tooling in combination with ML algorithms for 100k contributors completing billions of complex tasks
• Develop new AI infrastructure products to visualize query and explore Scale data

• A graduation date in Fall 2027 or Spring 2028 with a Bachelors degree (or equivalent) in a relevant field (Computer Science EECS Computer Engineering Statistics)
• Available for a Summer 2027 internship (May/June start dates) in San Francisco
• Product engineering experience such as building web apps full-stack integrating with relevant APIs and services talking to customers figuring out what to build and then iterating
• Previous Computer Science/Software Engineering internship experience
• Track record of shipping high-quality products and features
• Experience building systems that process large volumes of data
• Experience with Python Typescript React and/or MongoDB

• Hands-on experience with LLMs evaluations or agentic systems whether from coursework research or personal projects
• Open source contributions or a portfolio of shipped side projects

Our credos shape how we make decisions and work as a team:

• Earn Customer Love trust is earned with every interaction every delivery and every problem we solve
• Team Flow ideas energy and support move freely across teams; optimize for the whole
• Quality is Our Cheat Code the systems that deliver quality consistently are a structural advantage
• Find the 20% find the inputs that drive the outcomes and execute them completely
• Write the Market our research puts us at the frontier and we bring our partners there first
• Three Moves Ahead consider the consequences of consequences and plan accordingly

PLEASE NOTE:Our policy requires a 90-day waiting period before reconsidering candidates for the same role. This allows us to ensure a fair and thorough evaluation of all applicants.

About Us:

At Scale our mission is to develop reliable AI systems for the worlds most important decisions. Our products provide the high-quality data and full-stack technologies that power the worlds leading models and help 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. We are expanding our team to accelerate the development of AI applications.

We believe that everyone should be able to bring their whole selves to work which is why we are proud to be an inclusive and equal opportunity workplace. We are committed to equal employment opportunity regardless of race color ancestry religion sex national origin sexual orientation age citizenship marital status disability status gender identity or Veteran status.

We are committed to working with and providing reasonable accommodations to applicants with physical and mental disabilities. If you need assistance and/or a reasonable accommodation in the application or recruiting process due to a disability please contact us at Please see the United States Department of Labors Know Your Rights poster for additional information.

We comply with the United States Department of Labors Pay Transparency provision.

PLEASE NOTE: We collect retain and use personal data for our professional business purposes including notifying you of job opportunities that may be of interest and sharing with our affiliates. We limit the personal data we collect to that which we believe is appropriate and necessary to manage applicants needs provide our services and comply with applicable laws. Any information we collect in connection with your application will be treated in accordance with our internal policies and programs designed to protect personal data. Please see our for additional information.