Senior iOS Engineer

What You'll Do

• Own the end-to-end technical lifecycle of our iOS features—from architectural design and sprint planning to App Store submission, release management, and post-launch crash/performance monitoring (Crashlytics, Xcode Organizer).
• Architect and build robust, scalable iOS applications using Swift, UIKit, and SwiftUI. You will define the contracts for backend APIs we consume, ensuring seamless networking, caching, and offline-first data persistence.
• Optimize mobile performance relentlessly—debugging memory leaks with Instruments, reducing main-thread blocking, optimizing CoreData/Realm query performance, and minimizing app launch times and battery impact.
• Diagnose and resolve complex system-level bugs spanning multithreading concurrency (GCD, Async/Await), view controller lifecycles, and intricate state management across the app.
• Proactively refactor and modernize legacy Objective-C codebases into idiomatic Swift, adopting modern concurrency patterns and improving overall type safety and testability.
• Partner closely with Product Managers, UX/UI Designers, and Backend Engineers to translate high-level requirements, Figma prototypes, and API specifications into high-fidelity, accessible (VoiceOver, Dynamic Type) mobile experiences.
• Lead the team's agile execution—breaking down large epics into manageable stories, maintaining the health of our project board, and facilitating accurate delivery timelines. You will champion the use of T-shirt sizing for feature scoping and Fibonacci point estimation during sprint planning to ensure our iterations are predictable, sustainable, and consistently delivered.

What We're Looking For

• iOS Mastery: 5+ years of professional software development experience, with at least 4 years specifically in iOS. Expert-level proficiency in Swift and a strong working knowledge of Objective-C. You know the UIKit and SwiftUI frameworks inside and out, and understand when to leverage each.
• Architecture & Design: Deep expertise in object-oriented and protocol-oriented programming. You have battle-tested experience with iOS architectural patterns (MVVM, Clean Architecture, Coordinator) and dependency injection, ensuring our codebase remains modular and testable as we scale.
• Concurrency & Performance: Advanced understanding of multithreading, GCD, and Swift Concurrency (async/await, Actors). You proactively use Instruments to profile and eliminate performance bottlenecks before they reach production.
• Testing & CI/CD: A disciplined approach to quality—you write robust unit tests (XCTest), UI integration tests, and snapshot tests. You are comfortable maintaining CI/CD pipelines (Fastlane, GitHub Actions, or similar) to automate builds and streamline TestFlight deployments.
• Agile Estimation & Delivery: You are a proven leader in Agile environments. You confidently manage backlogs on project boards (Jira, Linear, or Asana) and take ownership of team estimation rituals—accurately applying T-shirt sizing to complex initiatives and utilizing Fibonacci point systems to fine-tune the workload for each iteration, ensuring the team never over-commits.
• Mentorship & Communication: You treat the codebase with a "leave it better than you found it" philosophy. You genuinely enjoy pair-programming, mentoring junior engineers, and conducting thorough code reviews. You articulate complex technical trade-offs to Product and Design partners with clarity and confidence, building trust across the entire organization.