What are the responsibilities and job description for the Full Stack AI Mobile Engineer (React Native + Frontier AI) position at Avenues International, Inc.?
Title: Full Stack AI Mobile Engineer
Full-time · In-person, Montreal / San Francisco (SF) / NYC
$170K salary Equity package
Our client is looking for a full-stack AI mobile engineer to join as their Founding Engineer. Potential to grow into a founding CTO.
You’ll be the second technical voice in the room, the person who turns the product into reality, and the one who shapes how we build for the next decade.
Must-haves
- You’ve shipped a 0→1 consumer mobile app before — ideally one that lived in the App Store and had real users.
- 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.
- You can be in-person, in Montreal, SF, or NYC.
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.
Client Technical Stack:
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
Salary : $150,000 - $170,000