Lead Mobile Engineer (Contractor)

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

LEAD MOBILE ENGINEER (CONTRACTOR)

Location: Remote — Eastern Europe & LATAMEngagement: ContractorExperience: Senior/Staff, 8+ yearsTime zone: Must consistently overlap with U.S. working hours

ABOUT HAULER HERO

Hauler Hero builds the operating system for residential and commercial waste haulers, including dispatch, routing, billing, payments, customer management, reporting, and the driver app that ties field operations together.

Our customers are private hauler owners, operators, and municipal waste leaders running essential services every day. Many are still managing their businesses through paper tickets, whiteboards, spreadsheets, disconnected systems, and legacy software. The result is missed revenue, messy routes, limited visibility, and too much time spent fighting fires instead of growing the business.

Today, we serve 240+ haulers across the country and are scaling quickly. We are a well-funded, fast-moving vertical SaaS company bringing modern software to an essential industry where the customer need is clear and the opportunity is large.

ROLE SUMMARY

We are hiring a Lead Mobile Engineer (Contractor) to be the most senior engineer on our mobile team. Today we have a native Kotlin Android app; you will help evaluate Kotlin Multiplatform and lead the build-out of our first iOS app (iPad first, phones later) while strengthening the offline-first foundation across both platforms.

This is a hands-on role. You will write code daily, drive architectural decisions across iOS and Android, and mentor the mobile team. It requires strong technical judgment, comfort with ambiguity, and clear communication in a remote environment.

AI-FIRST ENGINEERING

We are intentionally building an AI-assisted engineering organization. AI tools are part of the daily workflow, not optional.

What this means in practice:

• Daily use of tools such as Claude, Claude Code, Cursor, and GitHub Copilot
• AI-assisted implementation, refactoring, test generation, and boilerplate
• You focus on architecture, edge cases, and quality
• You review all AI-generated output with a trust-but-verify mindset

This role is not a fit for engineers who are resistant to AI-assisted development or who rely on AI output without understanding the code being produced.

KEY RESPONSIBILITIES

• Lead the evaluation of Kotlin Multiplatform for sharing business logic across Android and iOS, and own the recommendation
• Architect and build our first iOS app, targeting iPads used by drivers in the field
• Contribute to and review work in our existing Kotlin Android app — shared architecture decisions serve both platforms
• Strengthen offline-first architecture: local persistence, background sync, conflict resolution, and reliable 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

REQUIRED QUALIFICATIONS

• 8+ years building production mobile applications, with deep iOS/Swift expertise
• Working proficiency in Kotlin, with the ability to contribute to and review a production Android codebase
• Hands-on Kotlin Multiplatform experience integrating shared code into native apps
• Experience building offline-first mobile apps with real-time, two-way data sync
• Experience with mapping SDKs and location-heavy applications
• Experience leading or mentoring mobile engineers
• Strong CI/CD experience for mobile, such as Fastlane, Bitrise, or GitHub Actions
• Clear written and verbal communication in English; comfortable working async across time zones

NICE TO HAVE

• Deep Android production experience, including shipping and operating Android apps at scale
• Firebase/Firestore
• Camera, photo capture, or on-device vision/ML experience
• Logistics, field service, or B2B SaaS background

WHAT WE LOOK FOR

• Ownership: You take problems through to resolution and sweat the edge cases that matter in the field
• Judgment: You weigh new technology critically — adopting KMP or not is a decision you will help make, not inherit
• Communication: Proactive, clear, and async-friendly; missing context is surfaced, not assumed

CONTRACTOR AND LOCATION NOTES

• This is a contractor role, not full-time employment
• Senior-level ownership and reliability are expected
• This role is open to candidates located in Eastern Europe or LATAM
• Consistent overlap with U.S. working hours is required