AI Engineer

⚡ We're winning quickly: Backed by Accel, by the same partner who led the first round for Scale, Vercel, and Sentry, plus Sheryl Sandberg's fund SBVP and Neo. We launched in February 2026 (announced here), and are already powering pages that generate hundreds of thousands of dollars in pipeline + featured on CNBC.

⚡ Recognized names that turn heads: We've earned the trust of customers like Cognition, Glean, Langchain, Tandem, 11x, + more we don't publicly reference. (Our gong has been put to great use!)

Flint is the agentic platform that ships pages from your brand and ad campaigns. AI doesn't replace marketers. It removes the work that should never have been theirs: building a one-off landing page for every keyword, every campaign change, every A/B test, then waiting on design and engineering to do it. Today we deliver on-brand pages on your own domain in minutes, with no rebuilds and no engineers. We're backed by Accel, Sheryl Sandberg (former Meta COO)'s venture fund SBVP, and Neo.

Sandberg instantly understood Flint's vision. "I was sharing how it took (me) five teams three months to build one A/B test just to increase conversion by 10% on our Google ad," Lim said. "And then she stopped me, [and] said, 'Michelle, it was 140 people at Meta who had to do this'." — TechCrunch

Imagine a website that builds new pages, tests creative, and optimizes performance in response to real-world signals: competitive shifts, user behavior, trending search queries, the way an autonomous vehicle responds to road conditions and traffic. The marketer still owns the work that compounds and the work that requires taste: strategy, audience, creative direction, brand judgment. Flint takes the manual production off their plate so they get those hours back.

"One of the most talent-dense AI startups... each member of the early Flint team has a track record, and as a team, they perform like athletes. Amazing to watch." - Dan Levine, Accel

Flint is led by co-founders Michelle Lim, Engineer #1 turned Head of Growth and Product at Warp, and Max Levenson, engineering leadership at autonomous vehicle startup Nuro, then Engineer #2 at Vooma (YCS23).

Every single member of the Flint team has been a founding engineer / founder. Early stage best practices are in our team's DNA. Because of that, our team knows how to catalyze hockey stick growth, but just as critically, how to navigate it sustainably to create $XB valued companies. After all, we've done it before. We are alums of Netflix, Scale, and Shepherd (YC W21), and work together in-person out of historic Jackson Square.

Companies have used Flint to hit goals like…

• Ranking #1 on AI answer engines like ChatGPT, Perplexity and Google AI Overview

• Lifting ad conversion rates

• Generating hundreds of thousands of dollars in pipeline revenue

• 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

Basic qualifications:

• 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

Preferred qualifications:

• 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.

• TechCrunch - Oct 2025

• Business Insider - Nov 2025

• Pragmatic Engineer podcast - Dec 2025

• CNBC - Dec 2025

• Follow us on Linkedin and X

We are an intensely creative team. After work, we are (avid) readers, photographers, acapella singers, film critics (who don't hold back), bakers, yoga teachers, interior designers, and more.

Catch us in action at our launch party, rock climbing, celebrating birthdays, hosting trivia nights, going for pilates and more.