Senior iOS Engineer - Identity & Access Management

The role

You will own the iOS identity, subscription, and feature-access libraries. You will focus on authentication, sessions, and the sign-up and entitlement pipeline for onX apps.

What you will do

• Own onX's iOS identity, subscription, and feature-access libraries.
• Set technical direction for shared Swift packages.
• Co-own API contracts with backend.
• Harden token refresh and session lifecycle.
• Lead adoption of Swift strict concurrency.
• Build client-side observability for identity flows.
• Represent iOS in IAM design work.
• Partner with backend engineers, iOS platform leads, and product teams.
• Work with an Android counterpart to keep identity and entitlement behavior consistent.
• Grow the team's client expertise through code review, documentation, and mentoring.

Required qualifications

• Bachelor's degree in Computer Science or a related field, or equivalent experience.
• Six or more years of professional software development experience.
• At least three years of building and shipping production iOS apps in Swift.
• Deep knowledge of Swift and Swift Concurrency (async/await, actors, Sendable).
• Experience diagnosing race conditions and threading issues in production apps.
• Experience building and maintaining a shared library or SDK using Swift Package Manager.
• Working knowledge of mobile authentication: OAuth 2.0 / OpenID Connect, token storage in the Keychain, ASWebAuthenticationSession, and session handling.
• Security-first mindset.
• Experience driving cross-team technical initiatives.
• Strong curiosity for exploring new technologies, including AI.
• Ability to demonstrate onX's Company Values.
• Permanent US work authorization.

Nice to have

• Experience with identity platforms such as Ory (Kratos, Hydra), Auth0 or Okta, or with passkeys / WebAuthn.
• Experience instrumenting iOS apps with Sentry or similar tools.
• Experience with StoreKit, in-app subscriptions or entitlement checks.
• Experience building offline-first apps, or apps used where connectivity is unreliable.
• Experience working with a distributed team.
• A love of the outdoors and the apps that get people there.

Benefits

• Competitive salaries
• Annual bonuses
• Equity
• Comprehensive health benefits, including a no-monthly-cost medical plan
• Paid parental leave of 13 weeks for birthing parents and 5 weeks for non-birthing parents
• 401k matching at 100% for the first 3% you save and 50% from 3-5%
• Company-wide outdoor adventures and amazing outdoor industry perks
• Annual Get Out, Get Active funds
• Flexible time away package including PTO, STO, VTO, and paid holidays

Before you apply

• Permanent US work authorization is a condition of employment.
• Ability to travel bi-annually for multiple days to a corporate office or other onX strategic location.
• Cannot be employed if primary work location is in Alabama, Alaska, Arkansas, Connecticut, Delaware, District of Columbia (D.C.), Florida, Hawaii, Illinois, Kansas, Louisiana, Massachusetts, Missouri,

About the company

onX is a high-growth tech company that builds products to help people explore the outdoors. They are a distributed company with more than 400 employees across the country.