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Founding Mobile Engineer (React Native + AI)
Job
Avenues International, Inc.
San Francisco, CA (In Person)
Full-Time
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Job Description
Role:
Full-Stack AI Mobile Engineer Location:
Multiple location: CA/NY/Canada Full time: Onsite role About the Role Our client is looking for a Full-Stack AI Mobile Engineer to join as their Founding Engineer, with the opportunity to grow into a Founding CTO role over time. This is not a traditional engineering position. You ll be the second technical voice in the room- the person responsible for turning ambitious product ideas into reality while helping define how the company builds for the next decade. The ideal candidate is deeply technical, product-minded, AI-native, and thrives in fast-moving startup environments. What You ll Do
- Build and scale an AI-native consumer mobile application from 0→1
- You re fluent in React Native and comfortable owning the full mobile lifecycle: build, release, debug, monitor, iterate.
- You ve built with Claude (or other frontier models) in production
- prompts, tool use, evals, the works.
- You can move across the stack
- frontend, backend, infra, AI
- and you don t flinch.
- You ve worked or can learn HealthKit, sensor data, or wearable APIs and you understand how messy biosignals actually are.
- You re a founder, in your bones. You don t need a ticket to start working. You see a gap and close it. Bonus points
- Background or deep interest in nervous system science, somatics, neuroscience, or trauma research.
- You ve been the first engineer somewhere before
- and you know what that actually costs.
- You ve built AI-powered testing or eval pipelines and have strong opinions about them. AI-native at every layer.
- React Native (iOS-first, Android close behind)
- Claude-based architecture
- agentic workflows, tool use, structured outputs
- AI-powered QA testing (think: agents that test agents)
- IOS / HealthKit + wearable integrations
- HRV, Apple Watch, Oura, Whoop, EEG headbands
Backend:
Node or Python, Postgres, modern infra (Vercel / Fly / Render- your call)
- AI-native infrastructure
- every layer of the stack is a place where AI lives, not a place where AI is bolted on