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I'm Chaz Carey, a Senior Mobile Engineer with over 11 years of experience building production-grade iOS, Android, and cross-platform apps across insurance, fintech, and healthcare domains. I specialize in Swift, Kotlin, and React Native, delivering offline-first, high-performance, and secure systems. I’m skilled at CI/CD automation, API optimization, and system integration. I’m passionate about designing clean architecture, mentoring teams, and delivering reliable software that scales to thousands of users.\n\nI focus on driving robust architecture, mentoring teams, and delivering reliable software that scales smoothly. I enjoy collaborating with product and backend teams to align technical strategy with business goals and to foster a culture of quality and continuous improvement.…I'm Chaz Carey, a Senior Mobile Engineer with over 11 years of experience building production-grade iOS, Android, and cross-platform apps across insurance, fintech, and healthcare domains. I specialize in Swift, Kotlin, and React Native, delivering offline-first, high-performance, and secure systems. I’m skilled at CI/CD automation, API optimization, and system integration. I’m passionate about designing clean architecture, mentoring teams, and delivering reliable software that scales to thousands of users.\n\nI focus on driving robust architecture, mentoring teams, and delivering reliable software that scales smoothly. I enjoy collaborating with product and backend teams to align technical strategy with business goals and to foster a culture of quality and continuous improvement.

Chaz Carey

App Developer, App Designer, Developer, +2

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I'm Chaz Carey, a Senior Mobile Engineer with over 11 years of experience building production-grade iOS, Android, and cross-platform apps across insurance, fintech, and healthcare domains. I specialize in Swift, Kotlin, and React Native, delivering offline-first, high-performance, and secure systems. I’m skilled at CI/CD automation, API optimization, and system integration. I’m passionate about designing clean architecture, mentoring teams, and delivering reliable software that scales to thousands of users.\n\nI focus on driving robust architecture, mentoring teams, and delivering reliable software that scales smoothly. I enjoy collaborating with product and backend teams to align technical strategy with business goals and to foster a culture of quality and continuous improvement.…I'm Chaz Carey, a Senior Mobile Engineer with over 11 years of experience building production-grade iOS, Android, and cross-platform apps across insurance, fintech, and healthcare domains. I specialize in Swift, Kotlin, and React Native, delivering offline-first, high-performance, and secure systems. I’m skilled at CI/CD automation, API optimization, and system integration. I’m passionate about designing clean architecture, mentoring teams, and delivering reliable software that scales to thousands of users.\n\nI focus on driving robust architecture, mentoring teams, and delivering reliable software that scales smoothly. I enjoy collaborating with product and backend teams to align technical strategy with business goals and to foster a culture of quality and continuous improvement.

Available to hire

I’m Chaz Carey, a Senior Mobile Engineer with over 11 years of experience building production-grade iOS, Android, and cross-platform apps across insurance, fintech, and healthcare domains. I specialize in Swift, Kotlin, and React Native, delivering offline-first, high-performance, and secure systems. I’m skilled at CI/CD automation, API optimization, and system integration. I’m passionate about designing clean architecture, mentoring teams, and delivering reliable software that scales to thousands of users.\n\nI focus on driving robust architecture, mentoring teams, and delivering reliable software that scales smoothly. I enjoy collaborating with product and backend teams to align technical strategy with business goals and to foster a culture of quality and continuous improvement.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

Javanese

Advanced

Work Experience

Senior Native Mobile Engineer / Lead Mobile Engineer at Duck Creek Technologies

May 1, 2021 - July 1, 2025

Architected SwiftUI + Combine feature modules with Core Data and background sync for offline claims and policy management. Engineered Android Jetpack Compose components with Room, WorkManager, and Coroutine Flows for parallel data sync, boosting agent productivity by 35%. Led a cross-platform mobile team of 6 engineers, defined coding standards, conducted code reviews, and drove sprint planning. Developed React Native bridges for OCR scanning, e-signature, and push messaging to unify native and hybrid components. Optimized GraphQL + REST API integration with caching, pagination, and delta updates, reducing payloads by 40%. Automated end-to-end CI/CD pipelines with Fastlane, Bitrise, and GitHub Actions, enabling zero-downtime deployments. Tuned performance with Instruments and Android Profiler, reducing startup latency and frame drops by 35%+. Integrated Firebase Analytics and Crashlytics with custom event tracking, improving observability and reducing crash frequency by 30%. Designed n

Senior Mobile Developer / Lead Mobile Engineer at IWP Capital

December 1, 2017 - March 1, 2021

Built SwiftUI + Combine trading modules with real-time WebSocket feeds for millisecond updates. Implemented Kotlin Jetpack Compose trading screens with Room persistence and WorkManager for offline-first trading and background retries. Integrated Plaid and Stripe with RSA/AES encryption to achieve PCI-DSS compliance. Developed React Native dashboards for real-time portfolio visualization and event-driven push notifications. Automated release pipelines using Jenkins, GitHub Actions, and Fastlane, including linting, test automation, and release signing. Implemented feature flag management with Firebase Remote Config for progressive rollouts and regulatory updates. Partnered with compliance teams to implement JWT-based session management with biometric re-verification. Designed BigQuery + Amplitude analytics pipelines to drive product decisions. Refactored legacy MVC to modular MVVM architecture, improving scalability and testability. Introduced automated integration testing for financial

Native App Developer at Reveleer

August 1, 2013 - November 1, 2017

Created offline-capable iOS and Android apps with Core Data and Room for field record collection. Integrated FHIR / HL7 APIs with background synchronization and data validation for real-time patient data sharing. Designed secure data layers with AES-128 encryption, biometric access control, and keychain-based credential management. Automated CI with Jenkins and Fastlane, including static analysis, UI testing, and code coverage reporting. Built Appium and Espresso test suites covering >95% of critical workflows. Optimized image processing pipelines with multithreading and compression. Collaborated with compliance teams to ensure HIPAA certification and refactored legacy modules toward MVVM. Implemented crash and performance dashboards in Firebase Test Lab to detect regressions pre-release and managed background upload queues to preserve data integrity.