Senior iOS Engineer - Companion App for AI-Native Consumer Hardware

San Francisco, CA

• On-site (5 days/week)
• Full-time Compensation: $170,000–$230,000 + competitive equity
  
  
  

About The Company

Our client is a Series B consumer hardware company in San Francisco building AI-native devices. They operate as an R&D studio — each product is its own program rather than a version bump on a single line — and back a small, world-class team with an in-house prototyping lab and full creative control over the roadmap. Their next device launches this year.

Founded 2021

• :22 people
• Industry: Consumer Tech / AI hardware
  
  
  

The Role

You'll own the iOS companion app that sits directly on top of the client's hardware. It's the primary way customers interact with the device, so this is a central engineering role rather than a peripheral one — covering pairing and connectivity, real-time device state, firmware delivery, and surfacing on-device and cloud AI features. The work is cross-functional by default, alongside hardware, firmware, and backend/ML, and engineers own their features end-to-end from architecture through App Store release.

What You'll Be Doing

• Build device pairing and connectivity: BLE and Wi-Fi pairing, reconnection handling, background connectivity, and in-app firmware updates
• Craft a real-time, low-latency UI that reflects live device state and streaming data
• Surface on-device and cloud AI features, coordinating between local inference and cloud processing
• Architect the companion app: device state, sync, and graceful handling of offline and degraded connectivity
• Go deep on the native platform: background modes, push notifications, Bluetooth permissions, and battery/performance optimization for an always-connected app
  
  
  

Tech stack: Swift, SwiftUI/UIKit, Core Bluetooth, real-time data streaming

Requirements

• Strong Swift and SwiftUI/UIKit skills, with production iOS apps shipped

Explore our comprehensive directory of visa sponsorship jobs from employers worldwide who are ready to sponsor talented international professionals.

• Hands-on experience with Core Bluetooth and/or real-time data streaming
• Track record of owning a feature end-to-end — architecture, build, test, and App Store release
• Comfortable partnering across hardware, firmware, and backend/ML teams
• Self-directed and effective inside a small engineering team with minimal process
  
  
  

Nice to Haves

• Have shipped a production iOS app that pairs with physical hardware — a wearable, medical device, or other connected product
• Real native-platform depth on an always-connected app: background modes, permissions, battery and performance tuning
• Startup or small-team experience, including a small team operating inside a larger organization
• Personal projects or side builds that show sustained curiosity
• Background building complex, frequently updated iOS apps at scale, or from device-connected companies such as wearables or health hardware
  
  

  Interested in opportunities specifically in United State? Discover our dedicated Visa Sponsorship Jobs in United State page featuring roles from top employers in this location.

  
  

Why Join

• A central role: the companion app is the primary interface to the client's hardware
• Small, elite team with an in-house lab and end-to-end feature ownership
• Real hardware shipping this year, in a studio that prizes being prolific over chasing a single "next big thing"
  
  
  

Details

• Location: San Francisco, CA
• Work policy: On-site, 5 days/week
• Compensation: $170,000–$230,000 + equity
• Visa sponsorship: H-1B, OPT supported
• Employment type: Full-time