The Founding Software Engineer will develop and maintain Flint's web systems, lead architectural decisions, and rapidly prototype user-driven features.
tl;dr: Why choose Flint?
About Flint: Autonomous websites
The vision
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
The team
"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
The product
The role
Role scope
Basic qualifications
Preferred qualifications
What we offer
Our Culture
⚡We’re winning quickly.
- We’re backed by Accel, by the same partner who led the series A for Scale, Vercel, and Sentry. We launched out of stealth 2 months ago, and are already powering pages that generate hundreds of thousands of dollars in pipeline. Read more: TechCrunch
⚡We’re drowning in demand.
- Flint has thousands of companies on our waitlist with more coming inbound every day. The market has spoken. We're growing our team so we can stop turning away customers.
⚡Recognized names that turn heads.
- We’ve earned the trust of customers like Cognition, Modal, Reducto, and Momentic + more we don’t publicly reference. (Our new gong has been put to great use!)
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's venture fund SBVP, and Neo.
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.
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 one of the Flint team are founding engineers and former founders. We are alums of Netflix, Scale, Carrot, and Shepherd (YC W21), and work together in-person out of historic Jackson Square. We are selecting a final few to round out our founding team.
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.
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
As Founding Software Engineer, you’ll build the systems that power AI-native websites, shaping the technical architecture and culture of a company defining the next era of the internet.
- Build agentic systems that design and launch web experiences, leveraging cutting-edge AI techniques.
- Develop and maintain Flint’s core application across frontend, backend, and infrastructure.
- Design systems with robust evals, observability, and testing to push the frontier of AI reliability.
- Prototype rapidly with users and translate learnings into durable features.
- Lead architectural decisions that set Flint’s technical direction for years to come.
- Own projects end-to-end: from prototypes that test new ideas with users to production systems that serve as the foundation for our platform.
We’ve already tackled problems such as:
- SOTA applied AI for frontend code generation and design systems
- Novel UX patterns for AI-first software
- Distributed multiplayer systems for collaborative editing
- AST parsing and manipulation for generative code
- …and there’s much more ahead.
- You are a product-first engineer who cares deeply about user experience.
- You have strong full-stack engineering experience and are excited to work across the stack.
- You regularly use the latest AI-forward developer tools (Claude Code, Cursor, Copilot, etc).
- You take ownership from problem to solution, learning whatever you need to succeed.
- You love building MVPs, testing them with users, and iterating quickly.
- Have used website builders (e.g. Webflow or Framer) or CMS platforms (Sanity, Contentful, Strapi).
- You have built an AI product before
- Experience working in early-stage startups or small teams
$150K - $250K | Offers equity
Flint in the press- TechCrunch - Oct 2025
- Business Insider - Nov 2025
- Pragmatic Engineer podcast - Dec 2025
- Follow us on Linkedin and X
🌆 Historic office in Jackson Square (with 2 rooftops and a shower) - tour virtually here
💺 A crazy upside-down battlestation - tour virtually here
🌿 20 PTO days a year and full health benefits
🍽 Lunch and a fully stocked snack bar at the office
🦮 Dog friendly
🤝 Competitive salary + equity [we stand by our care for our employees]
✨ More benefits coming very soon.
"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
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.
Top Skills
Ai-Forward Developer Tools
Full-Stack Engineering
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