Open to opportunities

David User

@daviduser32

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Senior mobile engineer specializing in offline-first, secure Android, iOS, and cross-platform platforms.

United States

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What I'm looking for

I seek senior mobile roles focused on offline-first, secure cross-platform architecture, performance optimization, mentorship, and scalable CI/CD in mission-driven companies.

I am a Senior Mobile Engineer with 10+ years building offline-first, secure mobile platforms for healthcare, education, and SaaS. I design scalable cross-platform architectures (React Native, Kotlin/Java), optimize performance (cold start -28%, memory -22%), and deliver CI/CD pipelines and shared UI systems that support millions of users.

I lead end-to-end mobile delivery including HIPAA-compliant data handling, OAuth2/JWT auth, real-time sync, and accessibility improvements. I mentor engineers, run staged rollouts and instrumentation, and partner with product and backend teams to increase retention, reduce audit errors, and accelerate release velocity.

Experience

Work history, roles, and key accomplishments

Current

Senior Mobile Engineer

Current

Talkspace

Apr 2024 - Present (1 year 10 months)

Led mobile architecture for Talkspace iOS and Android apps, delivering React Native platforms and a shared UI library that reduced platform-specific development by 40% and cut UI development time ~30%; optimized cold start by 28% and memory by 22% while ensuring HIPAA-compliant secure storage and auth.

React Native Kotlin MVVM Redux Performance Tuning Offline First CI CD HIPAA

Senior Mobile Engineer

AlayaCare

Feb 2021 - Mar 2024 (3 years 1 month)

Architected offline-first mobile apps used in 1M+ in-home patient visits/month, implementing encrypted local storage and conflict resolution to enable 99.9% task completion in no-connectivity environments and reducing audit errors by 35%.

Android Kotlin Offline First Background Sync Performance Optimization

Mobile Engineer

Articulate

Jul 2018 - Jan 2021 (2 years 6 months)

Developed mobile-first learning platforms for 30,000+ learners across 20+ countries, improving load times ~35% and increasing course completion rates by 18% through reusable UI components and offline caching.

React Native JavaScript Caching Localization Performance Optimization Detox Appium

Mobile Engineer

MojoTech

Jan 2017 - Jun 2018 (1 year 5 months)

Delivered mobile apps for clients including MoneyLion and Blue Cross, building React Native prototypes and secure auth/billing integrations that reduced time-to-market by ~35% and compliance gaps by ~50%.

React Native Java GraphQL Expo Performance Optimization