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Why choose Flint?
⚡We’re winning - come win with us.
- We’re moving fast. In March ‘25, we didn’t exist. Today, we’ve earned the trust of companies like Cognition and 11x, and we’re powering pages that serve live traffic and generate hundreds of thousands of dollars in pipeline. We’re backed by Accel, by the same partner who led the series A for Scale, Vercel, and Sentry.
⚡Create a product that feels like magic.
- We could be biased, but we think our product is really fun to build. Flint’s product sits at the intersection of [1] beautiful, human-first UI [2] intelligent AI-powered features [3] direct line to high stakes business decisions.
⚡Leadership who’ve been in your shoes
- Michelle was 1st engineer at Warp and Max was 2nd engineer at Vooma - they bring extreme empathy for the founding team roles and have gone from 0 to 1 before.
See our team doing their thing: link, link, link. And more to come.
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About Flint
Flint is the first autonomous website platform. We’re building a future where sites can observe, reason and act on their own, adapting in real time to the needs and desires of people and AI agents alike. We’ve raised a $5M seed round led by Accel, alongside Neo and Sheryl Sandberg’s fund, to accelerate this vision. Early adopters include Cognition, creator of the first AI software engineer, and Modal, the leading AI compute platform.
The vision
Imagine a world where your website launches new pages, tests creative, and optimizes performance entirely autonomously. Just as autonomous vehicles respond to real-world inputs like road conditions and traffic patterns, Flint-powered websites respond to external signals such as competitive shifts, user behavior, and trending search queries.
If building the future of the web excites you, read on!
The team
“One of the most talent-dense AI startups... each member of the early Flint team has a track record... Amazing to watch.” - Dan Levine, Accel
(thanks, Dan! 🙂)
Flint was founded in 2025 by 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).
Our small, tight-knit San Francisco team are alums of Scale, Carrot Fertility, and Shepherd (YC W21); we work together in-person out of historic Jackson Square.
Early engineer / operator / founder 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.
The product
Companies have used Flint to hit goals like….
- Ranking #1 on AI answer engines like ChatGPT, Perplexity and Google AI Overview
- Driving 50% higher ad conversion rates on Google Ads months ahead of schedule
- Generating hundreds of thousands of dollars in pipeline revenue.
The first version of Flint's autonomous website platform produces on-brand landing pages from content briefs and prompts in minutes. Flint ingests a company's existing design system – components, brand guidelines, and visual tokens – then generates fully-coded landing pages that live on the customer’s top-level domain, on a subfolder at URLs like companysite.com/campaign-name
🥁 And now, what you’ve been waiting for….
The Role
Role scope
- 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