Product Engineer, MobileDavid Joseph & Company • San Francisco, California, United States
Product Engineer, Mobile
David Joseph & Company
- San Francisco, California, United States
- San Francisco, California, United States
Über
$150,000–$200,000 + competitive equity
About the Company We're an AI-powered consumer company applying general intelligence to human connection — a voice-first product that learns each user's story and helps make real, meaningful matches. Since launching earlier this year we've seen explosive demand (a viral launch and thousands of signups that pushed our infrastructure to its limits), have hardened the platform, and are now expanding to a wider audience as we head into our next growth phase.
Founded 2025 · Seed-stage, 1–10 people · Industry: AI Tools / consumer AI
The Role We're looking for a React Native mobile engineer who builds consumer products with the care and craft of an artisan. This is a product-led, user-obsessed role working on complex audio and voice features that make the experience feel distinctly human. You'll own the mobile app end-to-end across iOS and Android and work directly with the founding team on architecture and product.
What you'll be doing
Own and elevate the mobile app end-to-end in React Native across iOS and Android
Build complex audio and voice features that make the experience feel human and intentional
Take products from concept to production with a high degree of autonomy and ownership
Work directly with the founding team on architectural and product decisions
Steward the quality and craft of a consumer product held to Apple-level design standards
Contribute to the platform as it scales from hundreds of users to millions
Tech stack:
React Native (iOS & Android); complex audio/voice features; full-stack capability to take features end-to-end.
Requirements
Work in-person in San Francisco, CA
2 to 6 years production React Native experience, required
Has shipped a React Native app to both iOS and Android in production
Consumer mobile app experience at a startup or unicorn
Complex audio or voice feature experience strongly preferred
High agency, detail-oriented, product-obsessed
Green Flags
Production React Native experience at a company where RN was the primary mobile framework, Discord, early Airbnb, early Instacart, Shopify, or equivalent, this is the clearest signal of fit
Background from companies like Uber, Uber Eats, Afterpay, or Cash AppHas shipped a cross-platform app to both iOS and Android simultaneously in React Native, not just React web
Consumer product background at a company that went through significant scale, understands architectural decisions made under pressure
Has built or contributed to complex audio or voice features in a mobile context, directly relevant to the company's core product
Even one strong internship or junior year at an RN-based startup is a good starting block
Detail-oriented and design-conscious, cares about how the product feels, not just whether it works
Red Flags
React web experience being sold as equivalent to React Native
Swift or native iOS only, no cross-platform experience, the company needs both Android and iOS
No production mobile app experience, only web or side projects
Low agency, needs heavy direction or a defined task queue to be productive
Not willing to be in person in San Francisco, in-person culture at the office is core to how the company works
Why Join
A genuinely novel technical challenge at the core: real-time AI voice and audio in a consumer product
Proven product-market fit and demand strong enough to crash the app on day one — now entering a growth phase
Apple-level craft, high autonomy, and direct work with the founding team
Work alongside founders, free lunch and dinner in office, health insurance
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Sprachkenntnisse
- English
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