Machine Learning Engineer, Applied AI Intern (Summer 2027)

Rebuild how the world works, to make institutions work better for the people they serve.

Brain Co. builds AI-native operating systems for large, regulated institutions. Each system is built for a specific industry, powered by agents that push real workflows forward. Underneath it all is Atlas, our proprietary platform that keeps customers in control, secure by design, and never locked into one model.

Brain Co. is entering its next phase of production deployments on a national scale with an elite team built from Palantir, Google, Meta, and Nvidia, and a growing footprint across government, insurance, health, and financial services.

Joining now means shaping both the company and a new category of applied AI. Every project here ships to production and is expected to create measurable customer value and impact.

You'll work alongside exceptional peers on some of the hardest problems in applied AI. It’s the kind of work you'll still be proud of in ten years from now.

As an AI/ML Engineer Intern, you’ll work alongside experienced engineers and researchers to help design, build, and deploy machine learning systems that solve high-impact problems in healthcare, government, and energy.

This internship is designed for current undergraduate students, specifically juniors and seniors graduating no later than June 2028, who want hands-on experience applying modern AI techniques, especially large language models, to real-world challenges. You’ll gain exposure to the full ML lifecycle while receiving mentorship and ownership over meaningful projects.

• Assist in designing and deploying LLM-powered applications to automate complex, real-world workflows

• Build and improve data pipelines and support model training, evaluation, and optimization

• Work with structured and unstructured data (e.g., text, documents, logs)

• Help prepare models and systems for production deployment and monitoring

• Collaborate closely with senior engineers, AI researchers, and product teams

• Learn best practices through code reviews, design discussions, and hands-on mentorship

• Gain exposure to customer-facing and real-world constraints, including working with public-sector institutions

• Are a current undergraduate students, specifically juniors and seniors graduating no later than June 2028, pursuing a degree in Computer Science, Machine Learning, Data Science, or a related field

• Have experience programming in Python

• Have coursework or project experience in machine learning or AI

• Have exposure to or interest in large language models and GenAI applications (e.g., agents, RAG, reasoning workflows)

• Have used or are eager to learn frameworks such as PyTorch, JAX, or TensorFlow

• Have strong fundamentals in data structures and algorithms
  Are curious, proactive, and excited to learn quickly in a fast-paced environment

• Enjoy owning problems end-to-end with guidance and support

• Dates: May 31, 2027 - Aug 6, 2027 or July 5, 2027 - September 10, 2027

• Competitive internship compensation

• Hands-on mentorship from experienced AI engineers and researchers

• Opportunity to work on real production systems used globally

• Potential return-offer consideration for future internships or full-time roles

• Daily lunches (if onsite)

The base salary range for this internship role is $8,000-10,000 per month plus a stipend for housing. We publish this range for every internship role, as a matter of policy regardless of whether local law requires it. Actual pay will depend on scope, skills, experience.