Software Engineering Intern (Summer 2027)

Scale AI
London, United Kingdom
On-site

Who this role is best for

Best suited to candidates with prior software engineering internship experience and a focus on AI infrastructure, working in the public sector or enterprise AI domain.

Best fit for

  • Candidates with prior software engineering internship experience and a track record of shipping products
    — “Track record of shipping high-quality products and features”
  • Individuals with experience building large-scale data processing systems
    — “Experience building systems that process large volumes of data”
  • Candidates who have worked with Python, Typescript, React, and/or MongoDB
    — “Experience with Python, Typescript, React, and/or MongoDB”
  • Candidates interested in AI applications for public sector challenges and national LLMs
    — “Generating high-quality training data for national LLMs”

Things to consider

  • The role requires availability in San Francisco during Summer 2027, which may impact remote candidates.
    — “Available for a Summer 2027 internship (May/June start dates) in San Francisco”
  • A 90-day waiting period is in place for reapplication to the same role.
    — “Our policy requires a 90-day waiting period before reconsidering candidates for the same role”

How to stand out

  • Demonstrate your ability to own and ship real projects, not just contribute to them.
    — “Interns own real, shipped work on the same roadmaps as full-time engineers”
  • Showcase experience with AI infrastructure, such as LLMs or agentic systems.
    — “Hands-on experience with LLMs, evaluations, or agentic systems”
  • Emphasize your full-stack engineering experience, especially with web apps and APIs.
    — “Product engineering experience such as building web apps full-stack, integrating with relevant APIs and services”
  • Demonstrate your ability to work on systems with high user scale and complexity.
    — “Create optimized and efficient UI/UX tooling, in combination with ML algorithms, for 100k+ contributors completing billions of complex tasks”
Pace · Fast PacedCollaboration · HighAutonomy · MediumDecision Impact · Team

Derived from job-description analysis by Serendipath's career intelligence engine.

What success looks like

  • Ship high-quality products and features
  • Develop reinforcement learning and post-training data pipelines
  • Create evaluation infrastructure for model reliability
Typical background
Bachelor's degree in Computer Science, EECS, Computer Engineering, Statistics

Skills & requirements

Required

PythonTypeScriptReactMongoDBProduct Engineering ExperienceBuilding Systems That Process Large Volumes Of Data

Preferred

LlmsEvaluationsAgentic SystemsOpen Source Contributions

Stack & domain

PythonTypeScriptReactMongoDBAIData Processing

About the role

Original posting from Scale AI via Greenhouse

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

Scale'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.

Scale’s rapidly growing Global Public Sector team is focused on using AI to address critical challenges facing the public sector around the world. Our core work consists of:

Creating custom AI applications that will impact millions of citizens

Generating high-quality training data for national LLMs

Upskilling and advisory services to spread the impact of AI

Example Projects:

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 Scale's platform

Build fraud-detection systems that remove bad actors and keep Scale's 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

Requirements:

A graduation date in Fall 2027 or Spring 2028 with a Bachelor's 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

Please reference the job posting's subtitle for where this position will be located.

Nice to have:

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

How we work:

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 world's most important decisions. Our products provide the high-quality data and full-stack technologies that power the world's 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 accommodations@scale.com. Please see the United States Department of Labor's Know Your Rights poster for additional information.

We comply with the United States Department of Labor's 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 privacy policy for additional information.

Source: Scale AI careers (Greenhouse)

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