Flint Mobile

Software Engineer

San Francisco

Sponsorship not specifiedDetected 210 days ago

Full-Stack DevelopmentLLMsAgentic AIA/B TestingDesign SystemsAvidWebflowLeadership

About the role

Flint's core application across frontend, backend, and infrastructure.
Evals, observability, and testing for AI systems, the work that makes generated output reliable.
Rapid prototyping with users, and turning what you learn into durable features.

Responsibilities

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.
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.
agents that design and ship real web experiences, the code-generation and editing infrastructure under them, and the product that ties it together.
As a Software Engineer at Flint, you'll build the systems behind AI-native websites: agents that design and ship real web experiences, the code-generation and editing infrastructure under them, and the product that ties it together.
It's a broad role by design: we're small, so you'll move across frontend, backend, and the agentic systems depending on where the hard problem is that week.
Agentic systems that design and launch web experiences using current-best applied-AI techniques.
SOTA applied AI for frontend code generation and design systems
TechCrunch https://techcrunch.com/2025/10/14/sheryl-sandberg-backed-flint-wants-to-use-ai-to-autonomously-build-and-update-websites/ - Oct 2025

Requirements

You have strong full-stack experience and want to work across the whole stack.

Compensation

🤝 Competitive salary + equity [we stand by care for our employees https://www.linkedin.com/posts/michlimlim_my-buddy-prem-nair-was-engineer-2-at-windsurf-activity-7355686617514188800-FihO/?utm_source=share&utm_medium=member_desktop&rcm=ACo

Benefits

🌿 20 PTO days a year and full health benefits
✨ More benefits coming very soon.

Company info

"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 https://www.linkedin.com/in/michlimlim/, Engineer #1 turned Head of Growth and Product at Warp, and Max Levenson https://www.linkedin.com/in/max-levenson-a6102199/, 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
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! https://www.linkedin.com/posts/michlimlim_help-me-settle-a-debate-with-laura-lee-activity-7399163641784332288-O9Yl?utm_source=share&utm_medium=member_desktop&rcm=ACoAAB-lEvQBDMC4WORPKPe-emksA3DMuDZNghg)
Follow us on Linkedin https://www.linkedin.com/company/tryflintai and X https://x.com/tryflint/?utm_source=JD

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This listing is sourced directly from Flint Mobile's careers page and normalized into a canonical job model.