Senior watchOS Developer – Apple Watch Emergency Response App

Senior Swift/watchOS Engineer – Build an Apple Watch Emergency Response Platform We're building an Apple Watch application that allows older adults to summon professional emergency assistance with a single action. Unlike Apple's built-in Emergency SOS, our platform connects users to a professional Emergency Response Centre (ERC) and forms part of a larger healthcare product designed to help people live independently for longer. This isn't a typical fitness or productivity app. Reliability, simplicity and thoughtful engineering are critical, as the software may be used in genuine emergency situations. We're looking for an experienced Swift/watchOS engineer to lead the implementation of our Apple Watch application. The product has already has a defined scope: We have: - Detailed Product Requirements Documents (PRDs) - Technical specifications - User flows - UI/UX designs - Acceptance criteria - Defined milestone plan We're not looking for someone to invent the product, we're looking for someone who can build it to a high standard while contributing technical expertise where platform limitations require engineering judgement. The first phase focuses exclusively on Apple Watch: Apple Watch Ultra (Action Button launch) Apple Watch SE and Series (Complication launch) Future platforms (Android, WearOS, etc.) are separate projects. You'll own the watchOS implementation, including: - Native watchOS application development using Swift and SwiftUI - WatchConnectivity communication between the Watch and iPhone - HealthKit integration for approved mobility and health metrics - Core Location integration for emergency events - Apple Watch Action Button support (Ultra) - Watch Face Complication support (SE/Series) - SOS alert workflow and state management - WKExtendedRuntimeSession implementation - Integration with our existing backend APIs - Testing across both GPS-only and Cellular Apple Watch models - Discovery Phase Before development begins, we'd like to spend approximately one week validating a number of technical assumptions on real hardware, to confirm our scope. This includes: - HealthKit capability validation - WatchConnectivity reliability - Cellular vs GPS behaviour - CoreMotion feasibility - Technical recommendations for V1 This discovery work will help confirm the final implementation plan before the build phase begins. Must have: - Strong commercial Swift development experience - Production watchOS development experience - Experience with WatchConnectivity - Experience with HealthKit - Experience shipping apps to the App Store Nice to have: - WKExtendedRuntimeSession - App Intents - WidgetKit / Complications - Core Location - Healthcare or medical applications - Safety-critical or highly reliable software How We Work: The project has been broken into clearly defined milestones with acceptance criteria. You'll be working closely with our product team, who will provide specifications, answer questions and review each milestone before payment. We're looking for someone who communicates well, identifies technical risks early, and enjoys collaborating rather than simply taking tickets.