Mobile Engineer: Privacy & Security Apps (iOS/Android)

RealDefense, LLC; Los Angeles (CA); Hybrid; USD 100,000 - 140,000; Full time

Benefits offered by this job

Office in LA

Job summary

RealDefense LLC is looking for a mobile developer to join a small, hands-on team building privacy and security apps for iOS and Android. You’ll work with Swift, SwiftUI, and Kotlin Multiplatform, taking features from idea to App Store deployment.

You’ll collaborate directly with the head of mobile, influence architecture, and grow by owning features across platforms while working from the Los Angeles area with a three-day-per-week office presence.

Qualifications

• A CS degree or equivalent practical experience, and 1+ year of full-time professional experience building iOS apps in Swift.
• At least one app you helped ship to the App Store, from work or your own project, that you can walk us through end to end.
• Solid Swift and SwiftUI fundamentals: you can write, test and debug a feature on your own, with unit and UI tests as part of how you ship.
• AI-native development: you build with AI coding agents (Claude Code, Cursor, Copilot agent mode or similar) every day, and can show how you plan, direct, review and test what they write.
• Willingness to write and learn Kotlin, Kotlin Multiplatform and Compose Multiplatform. Many of our features live in shared code.
• Based in the Los Angeles area and able to work from our office 3 days a week.

Responsibilities

• Build privacy and security features with Apple's system extensions, such as content blocking and network filtering.
• Build subscriptions and accounts with StoreKit 2.
• Write shared Kotlin alongside Swift, and review both iOS and Android code.
• Own your features in production: TestFlight, App Store review, crash and log triage, performance and battery tuning with Instruments, fixes.
• Work with AI coding agents every day: plan the work, keep each step small and tested, review what the agent writes.
• Write a short plan before you build and keep it current as the work changes.

Skills

Swift

SwiftUI

Kotlin Multiplatform

StoreKit

App Store

Education

CS degree or equivalent

Tools

Xcode

Job description

RealDefense LLC is looking for a mobile developer to join a small, hands-on team building privacy and security apps for iOS and Android. You’ll work with Swift, SwiftUI, and Kotlin Multiplatform, taking features from idea to App Store deployment.

You’ll collaborate directly with the head of mobile, influence architecture, and grow by owning features across platforms while working from the Los Angeles area with a three-day-per-week office presence.