Engineering Intern — Summer 2027

Flint • San Francisco, CA

10d • Onsite

About The Position

Flint is the first self-improving system for performance marketing. We connect to brands' ad accounts and optimize them through creating pages instantly for each ad group and running a learning loop that continually improves conversions. We just signed a Fortune 10 customer, and within 48 hours their customer acquisition cost decreased by 50%. We're backed by Accel, Sheryl Sandberg (former Meta COO)'s venture fund SBVP, and Neo.

Requirements

• You're in your penultimate or final year of an undergraduate degree in Computer Science, Computer Engineering or Software Engineering.
• You've built and shipped something we can look at: a repo, a product people use, or a hackathon project we can open and try.
• You're happy to pick up work anywhere in the stack.
• When something breaks, you find out why before you change anything.
• You must already be authorized to work in the United States for the whole term. We don't sponsor visas for internships, and the application asks you to confirm this.

Responsibilities

• Own a part of the product that's live with customers and stays live after you leave.
• Work anywhere in the stack, from the UI down to the infrastructure it runs on.
• Use LLMs and agent workflows as everyday tools. The product is built out of them.
• Ship to production in your first few weeks, then keep going.
• At the end of the summer, show the whole company what you built and what it moved.

Benefits

• A named engineering mentor, plus a weekly one-to-one with your manager that doesn't get cancelled.
• One project with your name on it and a before-and-after number to show for it.
• Lunch in the office.
• A conversation about a full-time offer before you go back to school, not a form letter in October.

What This Job Offers

• Career Level: Intern