Known — Product Engineer, Mobile

davidjoseph-co; San Francisco (CA); On-site; USD 150,000 - 200,000; Full time

Job summary

davidjoseph-co is seeking a Product Engineer for mobile to own the Known app development in React Native across iOS and Android. This role requires 2 to 6 years of production experience, focusing on building complex audio and voice features that enhance user experience.

The position is full-time and on-site in San Francisco, CA, working directly with the founding team to drive architectural decisions.

The role offers a competitive salary range of $150,000 to $200,000, plus equity.

Qualifications

• 2 to 6 years production React Native experience, required.
• Experience shipping a React Native app to both iOS and Android in production.
• Detail-oriented and product-obsessed.

Responsibilities

• Own and elevate the Known mobile app end-to-end in React Native across iOS and Android.
• Build complex audio and voice features for a human-centered experience.
• Shape architectural and product decisions with the founding team.

Skills

React Native experience

Consumer mobile app experience

Complex audio or voice feature experience

Job description

Known — Product Engineer, Mobile

Type: Full-time | On-site | San Francisco, CA (Cow Hollow)
Compensation: $150,000–$200,000 + Competitive equity
Hiring count: 1
Visa sponsorship: None available
Reports to: Founding team (works directly with founders; intake notes reference "Aden")

The Role

A React Native mobile engineer to own and elevate the Known app end-to-end across iOS and Android, building complex audio and voice features that make the experience feel distinctly human.

What You'll Be Doing

• Own and elevate the Known 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 Known scales from hundreds of users to millions

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 App
• Has 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 Known's core product
• Even one strong internship or junior year at an RN‑based startup is a good starting block per Aden
• 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, Known 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 Cow Hollow office is core to how Known works

Role Details

Salary: $150,000–$200,000

Equity: Competitive

Location: San Francisco, CA (Cow Hollow) – On‑site

Visa sponsorship: None available

Employment type: Full‑time