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Sage AI Labs

Senior Mobile Developer (React Native)

Reposted 24 Days Ago
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In-Office
San Francisco, CA, USA
Senior level
In-Office
San Francisco, CA, USA
Senior level
Lead the design, development, and deployment of a flagship iOS app using React Native. Collaborate with cross-functional teams, define technical roadmaps, and mentor other engineers while ensuring high performance and mobile engineering best practices.
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Location: San Francisco, CA (In-Office, 4-5 Days/Week)
Type: Full-time
Experience Level: Senior (5+ years), Lead/Staff (7+ years)
Start Date: ASAP

About Us

We’re building GOLD, the next-generation super shopping app — a powerful, intuitive AI shopping agent designed to streamline how people discover and buy products online. Our mission is to help people get the best deals on the products they love, through a seamless and delightful shopping experience. Early launches have shown that users love the experience, and the company is entering growth mode to bring this experience into more hands.

We’re an early-stage startup based in San Francisco, led by the founder of GoogleX, Waymo and Udacity. Our team is lean, driven, and highly collaborative. If you're excited about building impactful technology from the ground up — and working shoulder-to-shoulder with an experienced founder — we’d love to meet you.

What You’ll Do
  • Lead the design, development, and deployment of our flagship iOS app built with React Native

  • Build and maintain high-performance and scalable mobile experiences
    Collaborate closely with design, product, backend engineering and AI research teams to ship shopping features

  • Define the architecture and technical roadmap for the iOS app as we scale

  • Own critical product features end-to-end, from prototype to production

  • Help set and promote mobile engineering best practices, code quality, and performance standards

  • Provide mentorship and technical guidance to other engineers as we grow the team

What We’re Looking For
  • 5-7+ years of professional mobile development experience, with proven expertise shipping consumer-facing apps

  • Deep expertise in React Native and strong experience with TypeScript/Node.js

  • Solid understanding of iOS-specific tooling (Xcode, provisioning, TestFlight) and deployment processes

  • Experience integrating with REST APIs

  • Strong grasp of mobile performance optimization, offline-first design, and UI/UX best practices

  • Comfortable working across the stack with backend engineers when needed

  • Bonus: experience with e-commerce or high-traffic consumer apps

  • Bonus: past experience leading teams or mentoring other developers

  • Bonus: previous experience with Expo Framework

Our Tech Stack
  • Mobile App: React Native, TypeScript

  • Backend: TypeScript (Node.js) and Python

  • Infrastructure: Google Cloud Platform

  • CI/CD: GitHub Actions, TestFlight, EAS

Why Join Us
  • Make an impact – Your work will be foundational to the product and user experience

  • In-person collaboration – Join a focused, fast-moving team working together daily in San Francisco

  • Proven leadership – Work directly with a founder who has built transformative technology companies
    Startup ownership – Influence product and engineering decisions from day one
    Compensation & equity – Well-funded startup with competitive salary, meaningful equity


What you need to know about the San Francisco Tech Scene

San Francisco and the surrounding Bay Area attracts more startup funding than any other region in the world. Home to Stanford University and UC Berkeley, leading VC firms and several of the world’s most valuable companies, the Bay Area is the place to go for anyone looking to make it big in the tech industry. That said, San Francisco has a lot to offer beyond technology thanks to a thriving art and music scene, excellent food and a short drive to several of the country’s most beautiful recreational areas.

Key Facts About San Francisco Tech

  • Number of Tech Workers: 365,500; 13.9% of overall workforce (2024 CompTIA survey)
  • Major Tech Employers: Google, Apple, Salesforce, Meta
  • Key Industries: Artificial intelligence, cloud computing, fintech, consumer technology, software
  • Funding Landscape: $50.5 billion in venture capital funding in 2024 (Pitchbook)
  • Notable Investors: Sequoia Capital, Andreessen Horowitz, Bessemer Venture Partners, Greylock Partners, Khosla Ventures, Kleiner Perkins
  • Research Centers and Universities: Stanford University; University of California, Berkeley; University of San Francisco; Santa Clara University; Ames Research Center; Center for AI Safety; California Institute for Regenerative Medicine

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