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. At H&N; WORK, we create creative, 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.

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. 7+ years professional experience in iOS development, with 2+ years in a technical leadership or architecture role. ~ Solid 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. ~ Strong Agile/Scrum experience and ability to work cross-functionally. ~ Familiarity with healthcare, wellness, or nutrition mobile apps. Cloud integration knowledge (AWS Amplify, Azure Mobile Apps, or custom APIs). 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 work from home culture and a collaborative team environment.

Career growth path toward Mobile Architect or Head of Mobile Engineering. Seniority level — Mid-Senior level Employment type — Full-time Job function — Engineering and Information Technology Industries — IT System Custom Software Development Get notified about new iOS Developer jobs in Canada. #

📌 Senior iOS Developer - AI/ML, Apple Health, and In-App Purchases (Ottawa)
🏢 Hu0026N Research
📍 Ottawa