Senior iOS Developer – AI/ML, Apple Health, and In-App Purchases

Overview

Senior iOS Developer – AI/ML, Apple Health, and In-App Purchases. At H&N WORK, we create innovative, mission-driven products that improve lives through advanced mobile technology. We are a compact, agile team that values innovation, ownership, and high-quality execution. As our key iOS lead, you will define the architecture, drive technical decisions, and guide the mobile product strategy for years to come.

About Us

At H&N WORK, we create innovative, mission-driven products that improve lives through advanced mobile technology. We’re a compact, agile team that values innovation, ownership, and high-quality execution. As our key iOS lead, you will define the architecture, drive technical decisions, and guide the mobile product strategy for years to come. Responsibilities • Lead the iOS architecture — choose frameworks, design patterns, and scalability strategies. • Develop and maintain apps using Swift, SwiftUI, Combine, and async/await. • Implement Apple HealthKit integrations for secure health/fitness data import and processing. • Design and integrate StoreKit In-App Purchase flows (subscriptions, consumables, non-consumables) with full validation and analytics tracking. • Deploy Core ML or TensorFlow Lite models for on-device AI/ML features such as personalization, prediction, and data analysis. • Establish and enforce coding standards, architecture guidelines, and CI/CD best practices. • Collaborate with product and design teams in an Agile/Scrum environment to plan and execute feature roadmaps. • Integrate RESTful and GraphQL APIs with robust error handling and offline-first data strategies. • Optimize performance using profiling tools and implement caching strategies for low-latency user experiences. • Lead TestFlight testing, App Store submissions, and ensure compliance with Apple’s guidelines. • Mentor and guide junior/mid-level iOS engineers; conduct code reviews and technical workshops. Qualifications • 7+ years professional experience in iOS development, with 2+ years in a technical leadership or architecture role. • Expert in Swift, SwiftUI, Combine, and async/await concurrency. • Proven track record with Apple HealthKit integrations. • Strong expertise with In-App Purchases using StoreKit, including subscription management and server-side receipt validation. • Practical experience with Core ML, on-device AI/ML workflows, and data privacy best practices. • Mastery of UIKit, Core Data, concurrency management, and offline-first application design. • Experience with CI/CD for mobile (GitHub Actions, Bitrise, Jenkins). • Strong Agile/Scrum experience and ability to work cross-functionally. • Excellent problem-solving, communication, and mentorship skills. Nice-to-Have Skills • Knowledge of Objective-C for legacy maintenance. • Experience with Firebase, push notifications, deep linking, and analytics (Firebase Analytics, Amplitude). • Familiarity with healthcare, wellness, or nutrition mobile apps. • Cloud integration knowledge (AWS Amplify, Azure Mobile Apps, or custom APIs). What We Offer • Full technical ownership of the iOS platform. • Opportunity to design the long-term iOS architecture and technology stack. • Work on impactful projects with state-of-the-art iOS technologies and AI/ML integrations. • Flexible remote work culture and a collaborative team environment. • Career growth path toward Mobile Architect or Head of Mobile Engineering. Details • Seniority level — Mid-Senior level • Employment type — Full-time • Job function — Engineering and Information Technology • Industries — IT System Custom Software Development

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