Senior iOS Engineer w/ Screen Time API Experience: Digital-Wellbeing App

We're an early-stage team building a native iOS app in the digital-wellbeing space, built on Apple's Screen Time APIs. We have a partially functional SwiftUI prototype and a clear spec, and we're looking for a senior iOS engineer to help take it to a polished TestFlight build and ultimately help us publish it to the App Store. This is hands-on, ship-focused work with real Apple-platform depth — for someone who's lived in the FamilyControls / DeviceActivity corner of iOS and enjoys making a constrained, tricky system feel effortless to the user. Note that we’re already working with a design team, so this is a dev-only task. What you'll do Stabilize and extend an existing SwiftUI codebase built on Apple's Screen Time framework (FamilyControls, DeviceActivity, ManagedSettings / ManagedSettingsUI) and its associated app extensions. Build out core product surfaces — onboarding, settings, a content-driven interface, and a polished branded experience — and get a clean, reliable build into TestFlight. Wire up authentication and product analytics; iterate quickly against real-device testing alongside a designer. Integrate a paywall tool like RevenueCat or Adapty and help us publish it to the App Store Must-haves Senior-level native Swift & SwiftUI; you've shipped and maintained real iOS apps. Direct, hands-on experience with the Screen Time API family — FamilyControls, DeviceActivity, ManagedSettings / ManagedSettingsUI — and building/shipping iOS app extensions. (This is the core filter — please don't apply without it.) Comfort with App Groups, cross-process state, and the reality that this stack only truly works on a physical device. Pragmatic and self-directed: you take an ambiguous, barely-built thing and make it solid. Nice-to-haves You've shipped a focus, screen-time, parental-controls, or digital-wellbeing app (or something comparably extension-heavy). Even though we’re working with designers, a real eye for UX polish; you care how it feels, not just that it compiles. Familiarity with hosted auth (e.g., Clerk), product analytics (e.g., PostHog), RevenueCat and Adapty, and StoreKit/subscriptions. Logistics Contract, fully remote. Focused multi-week to multi-month engagement, with potential for follow-on work. To apply — please answer briefly (this is how we'll shortlist): Tell us about a time you worked directly with the Screen Time API family — what you built, and one gotcha you hit. Links to App Store apps or code welcome.