Senior Android/iOS Application Developer

Alexander Zmyewski

Senior Android/iOS Application Developer

+1-505-***-**** *********.*****@*****.***

Wells, Nevada 89835, United States

Professional Summary

Senior Mobile Application Developer with 9+ years of experience specializing in native and cross-platform mobile development for iOS and Android. Demonstrated success in designing, building, and deploying high-performance applications across diverse industries including e-commerce, healthcare, and data analytics. Expertise in React Native, Flutter, Kotlin, Java, and Swift, with deep experience integrating RESTful APIs, implementing CI/CD pipelines, and optimizing application performance for enhanced speed and reliability. Proven ability to lead development teams, mentor junior developers, and deliver scalable solutions aligned with business goals and user needs.

Technical Skills

Mobile Development: React Native, Flutter, iOS, Android Languages: Kotlin, Java, Swift, Dart, JavaScript, Objective-C, C++, .NET Frameworks/Tools: Android SDK, iOS SDK, Jetpack Compose, SwiftUI, UIKit, Expo, Xcode, Android Studio APIs/Integration: RESTful APIs, GraphQL, WebSocket, OAuth2, Firebase CI/CD & DevOps: GitHub Actions, Fastlane, Bitrise, Jenkins, TestFlight, Firebase App Distribution Data Management: SQLite, Room, Realm, Core Data, AsyncStorage Performance & Monitoring: Firebase Crashlytics, Sentry, Flipper, Proguard, Instruments Security: Data Encryption, HIPAA Compliance, Secure Storage, Biometric Authentication UI/UX: Material Design, Human Interface Guidelines, Responsive Layouts, Accessibility Architecture: Cross-Platform Solutions, MVVM, Clean Architecture, Microservices Additional: RxJava, RxSwift, Dagger, Koin, Unity, Agile/Scrum, Git Key Expertise

• Designed and deployed 20+ scalable cross-platform apps using React Native/Flutter, achieving 90% code reuse across iOS/Android.

• Reduced crash rates by 40% and improved app performance through CI/CD pipelines (Fastlane, GitHub Actions) and proactive monitoring (Crashlytics, Sentry).

• Implemented HIPAA-compliant security features (encryption, OAuth2) for healthcare/fintech apps, ensuring data privacy and regulatory adherence.

• Managed end-to-end App Store/Play Store deployments, including beta testing (TestFlight), phased rollouts, and store compliance.

• Integrated native device features (biometric auth, camera, offline storage) and RESTful/GraphQL APIs for seamless functionality.

• Collaborated in Agile teams to deliver user-centric mobile solutions, optimizing UI/UX for accessibility and platform-specific guidelines.

Professional Experience

Senior Mobile Developer — Trango Tech — Mar 2021 – Present

• Developed and successfully launched 20+ high-performance cross-platform mobile applications using React Na- tive and Flutter for iOS and Android platforms.

• Strategically implemented and optimized efficient CI/CD pipelines using Fastlane and GitHub Actions, signifi- cantly reducing deployment time by 35% through complete automation. 1

• Expertly integrated multiple RESTful APIs and various third-party services including Firebase, Stripe, and AWS Cognito for enhanced application functionality and user experience.

• Consistently optimized overall application performance metrics, achieving remarkable 40% reduction in crash rates through proactive monitoring and systematic debugging processes.

• Successfully led and mentored a talented team of 5 developers in adopting modern MVVM architecture patterns and implementing clean code practices across all development projects.

• Carefully implemented and maintained HIPAA-compliant security features for healthcare applications including advanced data encryption protocols and secure authentication methods.

• Regularly conducted comprehensive code reviews and effectively established mobile development best practices and standards across the entire development organization.

• Actively collaborated with UX/UI designers to create highly intuitive and user-friendly interfaces following strict platform-specific design guidelines and accessibility standards. Mobile Application Developer — Westcombe Technologies — Aug 2017 – Jan 2021

• Designed and developed 10+ high-performance native iOS and Android applications using Swift, Kotlin and Java programming languages.

• Built innovative cross-platform solutions using React Native framework, achieving exceptional 85% code reuse across multiple mobile platforms.

• Implemented comprehensive automated testing strategies significantly reducing bug reports by 30% in production through rigorous QA processes.

• Integrated advanced biometric authentication features and secure local storage solutions for financial applications handling sensitive data.

• Managed complete end-to-end App Store and Play Store deployment cycles including thorough beta testing and strategic phased rollout strategies.

• Optimized overall application performance metrics, dramatically improving load times by 25% through advanced code optimization techniques.

• Collaborated effectively with backend development teams to design and consume efficient GraphQL and RESTful APIs for seamless data integration.

• Implemented sophisticated real-time communication features using WebSocket technology and Firebase for en- hanced chat and notification functionality.

Junior Mobile App Developer (React Native) — Shinetech Software — Apr 2016 – Jun 2017

• Developed and maintained multiple high-performance React Native applications for both iOS and Android platforms using modern JavaScript frameworks and libraries.

• Implemented fully responsive and adaptive user interfaces following Google’s Material Design guidelines and Apple’s platform-specific UI requirements and human interface principles.

• Successfully integrated various RESTful APIs and third-party services for efficient data synchronization and robust authentication functionality across multiple applications.

• Actively participated in rigorous code review processes and consistently adopted clean code architecture princi- ples to ensure highly maintainable and scalable codebase.

• Assisted senior developers in implementing comprehensive CI/CD pipelines using Jenkins for streamlined auto- mated testing and efficient deployment processes.

• Collaborated closely with experienced senior developers on advanced state management solutions utilizing Redux and Context API for complex application requirements.

• Conducted thorough unit testing and integration testing using Jest testing framework to ensure exceptional application reliability, stability, and production quality.

• Supported multiple cross-functional teams in fast-paced Agile development environment to consistently deliver critical features according to project schedule and deadlines. 2

Education

Bachelor of Science in Computer Science

University of California — Graduated: 2015

Relevant Coursework: Mobile Application Development, Software Engineering Certifications

• Google Associate Android Developer — Google — 2022

• Apple Certified iOS Developer (Swift) — Apple Inc. — 2020

• AWS Certified Developer – Associate — Amazon Web Services — 2019 Projects

• HealthTrack Pro: Fitness tracking application featuring real-time data synchronization and offline capabili- ties, supporting workout planning and health monitoring. Integrated with wearable devices and health APIs, achieving over 500K downloads on major app stores.

• MedConsult Pro: Healthcare consultation platform enabling secure patient-doctor communication, appointment scheduling, and electronic health record (EHR) management. HIPAA-compliant with end-to-end encryption and multi-factor authentication.

• E-Commerce Plus: Complete mobile shopping solution with product catalog, shopping cart, payment integra- tion (Stripe/PayPal), and order tracking. Implemented personalized recommendations and real-time inventory management.

• BizAnalytics Dashboard: Business intelligence application providing real-time analytics, data visualization, and custom reporting tools for small and medium enterprises. Integrated with major CRM and accounting software platforms.

• FinanceManager: Secure personal finance management app featuring biometric authentication, budget tracking, investment monitoring, and end-to-end encryption for financial data protection.

• SupplyChain Tracker: Logistics and inventory management solution for businesses, featuring real-time track- ing, predictive analytics, and automated replenishment systems. Integrated with IoT devices and warehouse management systems.

• LegalConsult Assistant: Legal consultation platform connecting users with attorneys, featuring document man- agement, secure messaging, and appointment scheduling. Implemented with advanced security protocols for client confidentiality.

• TaskFlow Manager: Enterprise project management tool with team collaboration features, time tracking, re- source allocation, and automated reporting. Integrated with popular productivity tools and calendar applica- tions.

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