Mobile Engineer (iOS / Android) — Denver, CO

About The Role

The role builds and maintains native mobile applications for iOS and Android that serve as the primary touchpoint for millions of users. This is hands-on product engineering: shipping features, optimizing performance, and owning quality across the full mobile stack.

The engineer will work closely with backend, design, and product teams in a fast-moving environment where release cadence, crash-free rates, and user experience are all measured and matter.

Key Responsibilities

• Design, build, and ship features in Swift/Kotlin (or cross-platform Kotlin Multiplatform/React Native where appropriate) for production iOS and Android apps

• Own end-to-end delivery of user-facing features: architecture, implementation, testing, release, and post-launch monitoring

• Integrate REST and GraphQL APIs, push notifications, deep linking, and background processing with robust offline-first behavior

• Improve app performance and reliability: startup time, memory footprint, ANR/crash rates, and battery efficiency, using tools like Instruments and Android Profiler

• Automate CI/CD pipelines with Fastlane, Xcode Cloud, or Gradle; manage app store releases, phased rollouts, and feature flags (LaunchDarkly or similar)

• Instrument analytics and crash reporting (Firebase, Sentry, Amplitude) and use the data to drive prioritization and fixes

• Participate in code reviews, architecture discussions, and mentoring of junior engineers

What We Are Looking For

• 3–6 years of professional mobile engineering experience with at least one app shipped and maintained at significant scale (100K+ MAU preferred)

• Deep proficiency in Swift and iOS (UIKit and/or SwiftUI) or Kotlin and Android (Jetpack Compose), with strong fundamentals in the second platform

• Solid understanding of mobile architecture patterns: MVVM, modularization, dependency injection (Hilt, Swinject), and reactive programming (Combine, Coroutines/Flow, RxSwift)

• Experience with offline storage, synchronization, and conflict resolution (Core Data, Room, SQLite, Realm)

• Hands-on with testing practices: unit, integration, and UI testing (XCTest, Espresso, Detox)

• Bachelor's degree in Computer Science or equivalent practical experience

• Bonus: Kotlin Multiplatform, React Native/Flutter experience, mobile security (certificate pinning, secure storage), or contributions to open-source mobile libraries