Lead Mobile Engineer (Contractor) - Remote, iOS/Android

Openkrill; United States; Remote; USD 138,000 - 220,000; Full time

Job summary

Hauler Hero is hiring a Lead Mobile Engineer (Contractor) to steer our mobile platform. You will shape the iOS app build, evaluate Kotlin Multiplatform, and reinforce offline-first capabilities across iOS and Android.

The role is hands-on, requiring strong architectural judgment and clear communication in a remote setting. You will mentor the mobile team, collaborate with backend, design, product, and QA, and operate in an AI-driven development workflow with daily tooling such as Claude and

Qualifications

• 8+ years building production mobile apps with strong iOS experience.
• Proficient in Kotlin with ability to review Android codebase.
• Hands-on Kotlin Multiplatform experience integrating shared code into native apps.
• Experience building offline-first mobile apps with real-time data sync.
• Experience with mapping SDKs and location-heavy apps.
• Experience leading or mentoring mobile engineers.
• Strong CI/CD experience for mobile (Fastlane/Bitrise/GitHub Actions).
• Clear written and verbal English; comfortable async across time zones.

Responsibilities

• Lead the evaluation of Kotlin Multiplatform for sharing business logic across Android and iOS, and own the recommendation
• Architect and build the first iOS app, targeting iPads used by drivers in the field
• Contribute to and review work in our existing Kotlin Android app
• Strengthen offline-first architecture: local persistence, background sync, conflict resolution, and photo capture/upload under poor connectivity
• Work with maps, location, and in-app navigation in a location-heavy product
• Set mobile engineering standards across iOS and Android through code reviews, architectural guidance, and mentorship
• Collaborate closely with backend, design, product, and QA in a fast-moving startup environment

Skills

iOS Swift

Kotlin

Kotlin Multiplatform

Offline-first

Maps/Location

Mentorship

CI/CD

Tools

Firebase/Firestore

Camera/ML

CI/CD tools (Fastlane/Bitrise/GitHub Actions)

Job description

Hauler Hero is hiring a Lead Mobile Engineer (Contractor) to steer our mobile platform. You will shape the iOS app build, evaluate Kotlin Multiplatform, and reinforce offline-first capabilities across iOS and Android.

The role is hands-on, requiring strong architectural judgment and clear communication in a remote setting. You will mentor the mobile team, collaborate with backend, design, product, and QA, and operate in an AI-driven development workflow with daily tooling such as Claude and