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Hi, I'm Oleh Storozhuk, a seasoned mobile developer with over 10 years of experience building high-performance iOS and Android applications. I specialize in React Native, Kotlin, and Swift and am passionate about creating clean, maintainable code with a strong focus on performance and user experience. I've had the opportunity to work on a range of projects from cross-platform mobile apps to intricate native Android and iOS applications. I enjoy collaborating with teams and solving complex programming challenges to meet project deadlines while continuously learning and evolving my skills.…Hi, I'm Oleh Storozhuk, a seasoned mobile developer with over 10 years of experience building high-performance iOS and Android applications. I specialize in React Native, Kotlin, and Swift and am passionate about creating clean, maintainable code with a strong focus on performance and user experience. I've had the opportunity to work on a range of projects from cross-platform mobile apps to intricate native Android and iOS applications. I enjoy collaborating with teams and solving complex programming challenges to meet project deadlines while continuously learning and evolving my skills.

Oleh Storozhuk

Web Developer, Programmer, App Developer, +1

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Hi, I'm Oleh Storozhuk, a seasoned mobile developer with over 10 years of experience building high-performance iOS and Android applications. I specialize in React Native, Kotlin, and Swift and am passionate about creating clean, maintainable code with a strong focus on performance and user experience. I've had the opportunity to work on a range of projects from cross-platform mobile apps to intricate native Android and iOS applications. I enjoy collaborating with teams and solving complex programming challenges to meet project deadlines while continuously learning and evolving my skills.…Hi, I'm Oleh Storozhuk, a seasoned mobile developer with over 10 years of experience building high-performance iOS and Android applications. I specialize in React Native, Kotlin, and Swift and am passionate about creating clean, maintainable code with a strong focus on performance and user experience. I've had the opportunity to work on a range of projects from cross-platform mobile apps to intricate native Android and iOS applications. I enjoy collaborating with teams and solving complex programming challenges to meet project deadlines while continuously learning and evolving my skills.

Available to hire

Hi, I’m Oleh Storozhuk, a seasoned mobile developer with over 10 years of experience building high-performance iOS and Android applications. I specialize in React Native, Kotlin, and Swift and am passionate about creating clean, maintainable code with a strong focus on performance and user experience.

I’ve had the opportunity to work on a range of projects from cross-platform mobile apps to intricate native Android and iOS applications. I enjoy collaborating with teams and solving complex programming challenges to meet project deadlines while continuously learning and evolving my skills.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Advanced

Work Experience

Senior Software Engineer at Leobit

August 1, 2021 - February 28, 2025

Built performant cross-platform mobile apps using React Native CLI for both iOS and Android. Developed over 5 cross-platform applications, integrated third-party APIs and services via RESTful interfaces. Developed Android apps using Kotlin and Java with clean code and MVVM architecture. Maintained Swift applications for iOS and enhanced UI components. Integrated Firebase and AWS Amplify for authentication, real-time databases, and notifications. Implemented secure payment gateways like Stripe and Apple Pay for e-commerce and subscription apps.

Senior Software Engineer at Leobit

August 1, 2021 - February 28, 2025

Built performant cross-platform mobile apps using React Native CLI, ensuring native-like performance on both iOS and Android. Developed over 5 cross-platform mobile applications with React Native for iOS and Android devices. Integrated third-party APIs and services using RESTful interfaces to enable enhanced functionalities and real-time data exchange. Developed Android apps using Kotlin and Java with a focus on clean code and MVVM architecture. Maintained Swift applications for iOS leveraging the latest Swift syntax and UIKit components. Integrated Firebase and AWS Amplify for secure authentication, real-time database, and push notifications. Implemented secure payment gateways such as Stripe and Apple Pay for seamless transactions in e-commerce and subscription apps.

Software Engineer at Zazmic

March 1, 2019 - July 31, 2021

Integrated native modules and third-party libraries for enhanced app functionality such as push notifications, maps, and camera access. Developed and launched high-performance cross-platform apps with React Native and TypeScript. Implemented native device feature integrations including camera, location, and background tasks. Created modular Android applications using Kotlin with MVVM, Hilt, Jetpack Compose, and XML layouts. Managed local persistence and network communication with Room, Retrofit, and custom interceptors. Ensured real-time data sync with WebSockets for chat and notifications.

Software Engineer at Zazmic

March 1, 2019 - July 31, 2021

Integrated native modules and third-party libraries to enhance app functionalities including push notifications, maps, and camera access. Developed and launched high-performance cross-platform mobile apps using React Native and TypeScript. Integrated native device features including camera, location services, and background tasks with Native Modules and React Native Bridge. Developed modular Android apps using Kotlin with MVVM, Hilt, and Jetpack Compose/XML layouts. Managed local persistence via Room and network communication using Retrofit/OkHttp with custom interceptors. Enforced real-time data synchronization through WebSockets for chat and notification systems.

Web Developer at Teleperformance

June 1, 2015 - January 31, 2019

Built responsive, high-performance web applications using React, TypeScript, and modern hooks. Developed reusable UI components with Material UI, Tailwind CSS, and Styled Components. Implemented complex state management using Redux Toolkit, Context API, and Zustand. Addressed customer feedback and production issues by implementing fixes using HTML5, TypeScript, and .NET, improving system stability and user experience.

Web Developer at Teleperformance

June 1, 2015 - January 31, 2019

Built responsive, high-performance web applications using React, TypeScript, and hooks-based architecture. Developed reusable UI components using Material UI, Tailwind CSS, and Styled Components. Implemented complex state management using Redux Toolkit, Context API, and Zustand. Reviewed customer feedback and resolved production issues using HTML5, TypeScript, and .NET, leading to improved system stability and user experience.