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Founding AI Engineer

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Flint

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Location:
United States , San Francisco

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Category:
IT - Software Development

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Contract Type:
Not provided

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Salary:

150000.00 - 250000.00 USD / Year
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Job Description:

Flint is defining the next generation of websites: ones that can constantly build and optimize themselves based on visitor behavior and market changes. Today, we deliver on-brand landing pages on your domain fast, without any rebuilds or engineers. We are backed by Accel, Sheryl Sandberg (former Meta COO)'s venture fund SBVP, and Neo.

Job Responsibility:

  • Designing and implementing production-grade agentic systems that power web experiences and marketing workflows, leveraging advanced prompt engineering and multi-agent architectures to do so
  • Architecting and optimizing RAG (Retrieval-Augmented Generation) systems with context engineering
  • Strengthening our engineering processes through robust evals, observability, and testing
  • Developing and maintaining the core application across frontend, backend, and infrastructure
  • Shaping our technical vision and leading architectural discussions. You'll make foundational decisions that influence both Flint's technical architecture and engineering culture.
  • Creating and testing prototypes to gather rapid feedback from users

Requirements:

  • You are a product-first engineer
  • You have built and deployed AI products that real users depend on
  • You have extensive hands-on experience with prompt engineering, context optimization, and model fine-tuning
  • You have strong full-stack engineering skills with experience integrating AI into web applications
  • You regularly use AI IDEs like Cursor or Windsurf to code
  • You take ownership of problems from start to finish and are eager to learn whatever you need to succeed
  • You’re comfortable in a fast-paced environment with evolving requirements
  • You have enthusiasm for building MVPs and iterating based on user feedback

Nice to have:

  • You have experience using AI for design system automation and component generation.
  • You have a lived understanding of using a website builder (e.g. Webflow or Framer) and/or CMS (e.g. Sanity, Contentful, Strapi).
  • Former founder or early-stage founding employee experience.
What we offer:
  • Historic office in Jackson Square (with 2 rooftops and a shower)
  • A crazy upside-down battlestation
  • 20 PTO days a year and full health benefits
  • Lunch and a fully stocked snack bar at the office, incl. Cometeer coffee pods
  • Dog friendly
  • Competitive salary + equity

Additional Information:

Job Posted:
January 10, 2026

Employment Type:
Fulltime
Work Type:
On-site work
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