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Senior iOS Engineer

onXmaps

$146,000 - $182,000
Sep 4, 2025
Bozeman, MT, US
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onX is seeking a Senior iOS Engineer to join the Fox Forge team to deliver best-in-class mobile experiences for outdoor enthusiasts, leveraging Apple platforms to bring mapping, GPS, and outdoor discovery features directly to users' fingertips. This role is critical for owning major components of the iOS app, driving technical decisions, and collaborating cross-functionally to ship impactful features, focusing on performance and scalability.

Requirements

  • Expert in Swift and the iOS ecosystem, with demonstrated experience shipping production iOS apps at scale.
  • Strong grasp of iOS frameworks (UIKit, SwiftUI, etc.) and architectural patterns.
  • Experience designing and debugging asynchronous, multi-threaded applications.
  • Proven ability to design and implement scalable mobile systems that integrate with backend APIs.
  • Deep understanding of algorithms, data structures, and their performance tradeoffs in production environments.
  • Familiarity with CI/CD pipelines, unit/UI testing frameworks, and monitoring tools for mobile applications.

Responsibilities

  • Lead the design, implementation, and delivery of complex features in the onX iOS applications.
  • Collaborate closely with Product, Design, and QA to deliver intuitive, performant, and reliable user experiences.
  • Mentor and support junior and mid-level engineers through code reviews, pairing, and technical guidance.
  • Influence architectural direction for the iOS app, ensuring scalability, maintainability, and performance.
  • Participate in technical discussions and make high-judgment decisions with long-term business impact.
  • Proactively identify opportunities for innovation and process improvement within the mobile platform.
  • Actively contribute to the hiring process by upholding a high bar for technical and cultural fit.

Other

  • 8+ years of experience is required.
  • Ability to operate independently on end-to-end workstreams, from concept through delivery.
  • Strong communication skills; able to mediate technical discussions and build consensus across teams.
  • Track record of mentoring other engineers and elevating team standards.
  • A shared passion for and ability to demonstrate onX’s Company Values.
  • Permanent US work authorization is a condition of employment with onX.
  • Ability to travel quarterly for multiple days to a corporate office or other onX strategic location, such as a Basecamp.