Machine Learning Engineer, Applied AI Co-Op Intern, Winter 2027
- Level
- Intern
- Work type
- Hybrid · San Francisco Bay Area
Not stated in the posting: salary, visa.
Open. First seen 14 October 2026.
About the role
Brain Co.'s standard text
Our Mission
Rebuild how the world works, to make institutions work better for the people they serve.
About Brain Co.
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.
Why Now
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.
About the Co-Op:
As an AI/ML Engineer Co-op 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 (juniors and seniors) 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.
What You’ll Do
- 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
You Might Be a Good Fit If You
- Are a current undergraduate student, specifically a junior or senior, 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
Co-Op Details & Benefits
- Winter / Spring Co-Op: January 11, 2027 - April 30, 2027
- Competitive co-op 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)
What this role asks for
Particular to this role
Generative AI · RAG · TensorFlow
Rare in Brain Co.'s other 30 open postings.
Standard for data science / ML roles
LLM · Machine Learning · PyTorch · Python
Common in data science / ML postings at any company.
65% of this description is written for the role. The rest is Brain Co.'s standard text, folded away below.
Read against Brain Co.'s other open postings on this site.
The team: AI/ML Engineering HIRES STEADILY
This role is one of 7 open in AI/ML Engineering. 3 were posted in the last 30 days and the oldest in June: a team that hires all year rather than one being built.
WHAT THE TEAM WORKS WITH, ACROSS ITS POSTINGS
LLM (7 of 7), Machine Learning (7 of 7)
OTHER ROLES ON THIS TEAM
- Machine Learning Engineer, Platform posted Sep 30
- Machine Learning Engineer, Applied AI posted Sep 30
- Machine Learning Engineer, Platform posted Aug 3
- Machine Learning Engineer, Applied AI - Deployed posted Jul 22
- Machine Learning Engineer, Applied AI posted Aug 1
- Machine Learning Engineer, Applied AI - Deployed posted Jun 27
From the team and dates on Brain Co.'s own job board.
See Machine Learning Engineer salaries in the United States →
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