OnTrac

Sr. Software Engineer - Mobile Engineer

OnTrac$120K — $145K *
Information Technology
5 - 7 years of experience
Job Overview by Ladders

Qualifications

  • 7+ years of professional software engineering experience
  • 3+ years with React Native
  • One production application shipped to Apple App Store or Google Play
  • Bachelor's degree in Computer Science or equivalent experience
  • Proficiency in React Native and TypeScript with Expo toolchain

Responsibilities

  • Build the offline-first field inspection tablet application using React Native/Expo
  • Implement encrypted local storage for various inspection-related data
  • Develop barcode/QR credential scanning and digital signature capture
  • Capture photo evidence with timestamping and geotagging
  • Create a background data synchronization engine between the device and backend
  • Integrate Okta authentication for field-deployed devices
  • Deliver unit and end-to-end test coverage while maintaining the build and distribution pipeline

Benefits

  • Collaboration with client technical lead and backend engineering team
  • Ownership of feature areas with minimal supervision
  • Engagement with stakeholders throughout the project lifecycle
  • Utilization of modern tools and technologies in mobile application development
  • Opportunity to contribute to an important state government project
Full Job Description
OVERVIEW

We are seeking a highly skilled and experienced Senior Software Engineer (Mobile) to join a contractor program supporting a critical customer engagement: a state government professional licensing and regulatory compliance platform built on Google Cloud. This role is ideal for a senior mobile engineer who has shipped offline-first React Native applications to production on iOS and Android and can own a feature area end to end with minimal supervision. The successful candidate will work closely with the client technical lead, the backend engineering team, and customer stakeholders to ensure project success from initial definition through final delivery.

Expected start date: 5 October 2026.

REQUIRED CREDENTIALS
• 7+ years of professional software engineering experience, including 3+ years with React Native
• At least one production application shipped to the Apple App Store or Google Play, or through enterprise distribution
• Bachelor's degree in Computer Science or equivalent practical experience

REQUIRED QUALIFICATIONS
• React Native and TypeScript, including the Expo toolchain
• Comfortable working in the native iOS and Android layers (Xcode, Android Studio) to integrate, configure, and debug native modules
• Offline-first architecture: local SQLite storage, encryption at rest, and data synchronization
• Device hardware integration: camera, barcode/QR scanning, signature capture, GPS
• Authentication with OIDC/OAuth 2.0 (Okta or comparable) and secure token storage
• REST API integration against backend services
• Mobile testing with Jest and an E2E framework such as Detox or Maestro

USEFUL QUALIFICATIONS
• Enterprise tablet deployment and mobile device management
• Familiarity with Google Cloud Platform services
• Experience in government or regulated environments
• Mobile accessibility (WCAG 2.1 AA)
• Mobile CI/CD (EAS, Fastlane, GitHub Actions)

SCOPE AND SOLUTION EXPECTATIONS

Below covers the scope of work we anticipate the contractor supporting throughout the project timeline.
• Build the offline-first field inspection tablet application on React Native / Expo for iPadOS and Android enterprise tablets
• Implement encrypted local storage for inspection checklists, violation records, and draft reports
• Implement barcode/QR credential scanning and digital stylus signature capture
• Implement photo evidence capture with timestamping and geotagging
• Build the background data synchronization engine between device and backend
• Integrate Okta authentication and secure session handling for field-deployed devices
• Deliver unit and E2E test coverage, participate in code reviews, and maintain the build and distribution pipeline for both platforms

About OnTrac

OnTrac is a courier and delivery service that specializes in overnight and time-critical deliveries. The company was founded in 1991 and has since grown to become one of the largest regional package delivery companies in the United States. OnTrac offers a range of services, including same-day delivery, next-day delivery, and two-day delivery, and serves customers in Arizona, California, Nevada, Oregon, Utah, and Washington. The company is committed to providing its customers with fast, reliable, and cost-effective delivery solutions, and has built a reputation for excellence in the industry.
Learn more about OnTrac
Size
3,000 employees
Industry

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