Principal iOS Engineer

Jumio; Palo Alto (CA); Hybrid; USD 170,000 - 250,000; Full time

Job summary

Jumio in Palo Alto is seeking a senior iOS leader to own large-scale mobile products, code in Swift, and shape architecture across modules. You will build native SDKs and collaborate with cross-functional teams on release pipelines, testing, and privacy-conscious data flows.

The role requires deep iOS internals knowledge, strong ownership, and willingness to influence distributed teams across platforms including Android and React Native.

Qualifications

• 8+ years of iOS development in Swift with principal ownership on large-scale products.
• Proven track record building native SDKs/frameworks used by external developers.
• Deep understanding of iOS internals, patterns, modular architecture, concurrency, lifecycle.
• Hands-on with CI/CD, automated delivery, semantic versioning, observability, release processes.
• Strong unit/integration testing, maintainability, reliability focus.
• Experience with digital identity, privacy-sensitive data flows, or regulated apps.
• Cross-functional leadership and ability to influence distributed teams.
• Knowledge of Android fundamentals and cross-platform reasoning.
• Open source contributions to mobile/tools/developer platforms.
• Delivery tooling with Ruby and Fastlane.
• Experience integrating React Native, Flutter, Cordova, etc.
• ML/CV on mobile collaboration features.

Skills

iOS development

Swift

Principal ownership

SDK development

Framework development

Release engineering

Testing

Mobile security

Privacy/compliance

Cross-functional leadership

Platform awareness

Open source contributions

Ruby

Fastlane

React Native

Flutter

Cordova

ML on mobile

Tools

Ruby

Fastlane

Job description

Requirements:

• Relevant depth: 8+ years developing iOS applications in Swift, with evidence of principal-level technical ownership on large-scale products.
• SDK and framework expertise: A strong track record building native SDKs or frameworks used by external developers or multiple production applications.
• Architecture fundamentals: Deep understanding of iOS internals, software design patterns, modular architecture, concurrency, lifecycle management, and dependency design.
• Release engineering: Hands-on experience with CI/CD, automated delivery, semantic versioning, observability, and dependable release processes.
• Quality mindset: Strong unit and integration testing practices, attention to maintainability, and an obsessive commitment to reliable software.
• Identity and privacy: Experience with digital identity, PII, mobile security, privacy-sensitive data flows, or comparable regulated product environments.
• Cross-functional leadership: Business-driven, outcome-oriented communication; able to gather requirements, resolve customer issues, and influence distributed teams.
• Platform awareness: Working knowledge of Android fundamentals and architecture, with the ability to reason across mobile platforms
• Open source: Meaningful contributions to mobile, SDK, tooling, or developer-platform projects.
• Delivery tooling: Ruby and Fastlane experience for repeatable build, signing, testing, and release automation.
• Cross-platform: Experience integrating or supporting React Native, Flutter, Cordova, or similar ecosystems.
• ML/CV on mobile: Experience collaborating on camera, document capture, face analysis, Core ML, or on-device inference features.