Linus Health is looking for a Staff Software Engineer to lead the technical direction for our mobile applications across iOS (Swift) and React Native. You will own the mobile architecture, design and build reusable component libraries, and champion the integration of AI-powered visualizations for brain-health data within a regulated healthcare environment.

What You'll Do

Own the mobile architecture across iOS (Swift/SwiftUI/UIKit) and React Native—focusing on modularity, performance, security, and observability.
Create and maintain reusable mobile component libraries aligned with design systems, including theming, accessibility, localization, and dark mode support.
Ship AI-enabled features that surface insights visually through charts, plots, and progressions, with a focus on privacy-by-design and auditable outputs.
Raise engineering standards through testing (unit/snapshot/e2e), CI/CD for mobile, OTA strategies, release automation, and crash analytics.
Mentor and unblock engineers; drive clear design docs, ADRs, and code reviews; partner deeply with Product, Design, Data Science/Medical, and Security.
Lead cross-team initiatives on performance, reliability, offline/edge patterns, network/data sync, app startup time, and bundle size reduction.
Champion AI-assisted workflows to boost delivery speed and quality through intentional prompts, verification practices, and secure usage guidelines.
Collaborate with Data Science/Medical to safely and clearly integrate model outputs into the UI, including visualizations of uncertainty and context.

What We're Looking For

10+ years of software engineering experience with significant time in mobile development.
5+ years building and shipping iOS applications in Swift.
3+ years working with React Native at scale.
Expert in Swift/SwiftUI (and/or UIKit), Xcode tooling, Instruments, and Apple platform fundamentals like background tasks, permissions, Keychain, and App Store Connect.
Strong React Native fundamentals including the bridge/native modules, performance profiling, Hermes, Metro/bundling, OTA, and navigation.
Proven track record designing reusable component systems covering design tokens, accessibility, theming, API ergonomics, and documentation.
Hands-on experience using AI to accelerate coding (scaffolding, refactoring, docs) and productizing AI in-app with safe prompts, evaluation, and guardrails.
Depth in mobile data flows (REST/gRPC, GraphQL, streaming), offline-first sync, error handling, and app state management.
Quality mindset with experience in unit/UI/e2e testing (XCTest, snapshot testing, Detox), monitoring, crash analytics, and metrics/SLOs.
Security and privacy literacy suitable for healthcare contexts, including PII/PHI handling patterns, least-privilege principles, and secure storage.
Clear technical communication skills for design docs, ADRs, tradeoff analysis, and stakeholder alignment.

Nice to Have

Experience in digital health or clinical workflows; familiarity with regulated environments.
Data visualization skills (e.g., Charts on iOS, D3/Reanimated/Skia in RN) and experience communicating uncertainty.
Native Android familiarity (Kotlin) or cross-platform build/release expertise.
Prior ownership of design systems or component libraries used across multiple apps or teams.
Experience with on-device ML or efficient edge inference patterns.
Experience architecting both B2B and Consumer-facing applications.

Technical Stack

iOS, Swift, SwiftUI, UIKit, React Native
Xcode, Hermes, Metro
XCTest, Detox
REST, gRPC, GraphQL

Team & Environment

You'll be joining a team of 100+ members and growing, in a highly cross-functional role that requires deep partnership with Product, Design, Data Science/Medical, and Security.

Work Mode

This is a remote position open to candidates located within the United States.

Linus Health is an equal opportunity employer. All qualified candidates will receive consideration for employment without regard to race, religion, color, national origin, sexual orientation, gender, gender identity or expression, age, genetic information, disability or any characteristic protected by law.