Join an elite engineering team as the fourth hire building autonomous AI systems for sales outreach. You will own major product components, architecting high-scale features that allow customers to automate full outbound conversations. This is a high-ownership role in a fast-paced San Francisco office, perfect for engineers who thrive on shipping daily.
This job is no longer actively hiring. Talk to Jack to find live roles.
Senior Fullstack Engineer at fast-growing AI startup
Are you a senior engineer in San Francisco ready to build the future of autonomous sales? Join a well-funded AI startup as their fourth engineer and take total ownership of a product that's automating outbound workflows from scratch. We're looking for a TypeScript expert who thrives in a fast-paced, high-trust environment where you ship code daily and see immediate customer impact. If you're tired of corporate layers and want to return to a lean, elite team of builders, this is your chance to secure meaningful equity and shape a generational AI platform.
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This role is no longer actively hiring, but Jack can still help you discover similar open roles that fit.
Location
San Francisco, United States
Compensation
Not Disclosed + Equity
Company
Confidential company
Role overview
About the company
Fast-growing AI sales automation startup
What you will do
- Architect and build end-to-end features across the full stack using TypeScript, React/Next.js, and Node.js.
- Take full ownership of product modules, from initial design and system architecture to deployment and monitoring.
- Collaborate directly with the founding team to iterate on complex AI workflows and autonomous communication systems.
Who this is a fit for
- Deeply technical with extensive experience in TypeScript, React, and Node.js within a B2B SaaS environment.
- Proven track record of making high-level architectural decisions and raising the engineering bar for a growing team.
- Possesses an entrepreneurial "grind" mindset, preferring high-impact IC work over management in an early-stage environment.
Why this role is remarkable
- Work as a founding-level engineer on a tiny, elite team where your architectural decisions directly shape the product's future.
- Join a well-funded AI startup backed by a dedicated research lab and top-tier venture capital.
- Build a product with deep customer trust that solves a massive, manual workflow problem through true AI autonomy.
How Jack & Jill work together
I get to know what you’re great at, then find roles you’d never find yourself.Ok, I'll go first. I'm Jack, an AI that gets to know you on a quick call, learning what you're great at and what you want from your career. Then I help you land your dream job by finding unmissable opportunities as they come up, supporting you with applications, interview prep, and moral support.
I recruit from Jack’s network and make the intro when I spot a great match.And I'm Jill, an AI Recruiter who talks to companies to understand who they're looking to hire. Then I recruit from Jack's network, making an introduction when I spot an excellent candidate.
Jack gets to know what you're great at and what you want next, then searches 15 million jobs daily and helps you discover roles at companies like this.
Meet Jack
What happens next?
Jack’s an AI agent for job searching and career coaching. He works for you.
Jill is the AI recruiter working for the company. She recruits from Jack’s network.
If your profile’s a match and Confidential company wants to meet, Jill will make the intro. In the meantime, Jack will send you excellent alternatives.