Yitzy Halon Oak Park, Michigan • 810-***-****

ad2ojl@r.postjobfree.com • linkedin.com/in/yitzyhalon829

Senior Mobile Frontend Developer

Results-driven and collaborative Mobile Developer with a track record of delivering successful cross-platform, high-quality mobile applications using React and React Native, seeking a senior-level position to lead a team of developers and drive the development of innovative mobile solutions that meet business objectives and exceed user expectations.

Always staying up-to-date with cutting-edge technologies and making advance for next generation and tech landscape.

Professional Experience

Vincit, Scottsdale, AZ

Senior React Native Developer 09/2021 - 11/2023

• Led the development for updates of eVouchers Retailers app and Readability Education app using React Native, Typescript, Expo for Android and iOS platforms.

• Duties included helping integrate native and React Native applications into a single code base.

• Worked closely with cross-functional team members to identify and resolve challenges and performance issues, resulting in a 50% improvement in app response time and enhanced user experience.

• Designed the rich user interfaces for Readability app and mentored and pair coded with junior developers to write high-quality code.

• Integrated React and React Native applications with RESTful APIs to enable seamless updates for Retail apps and helped backend developers with Python, Node.js, and .net skill sets for efficient combination of backend and frontend parts.

• Integrated the Continuous Integration/Continuous Deployment solutions used by Vincit team members for running automated testing and delivery of our mobile apps to Apple App Store and the Google Play Store.

• Managed and assigned tickets to developers using Jira, regularly provided updates on development, testing, and release progress in daily stand-ups, sprint planning, and demo meetings.

Ninehertz, Roswell, GA

Senior Mobile Frontend Developer 11/2018 - 09/2021

• Contributed to the architecture and design of the MVVM for new iOS apps including healthcare and doctor appointment apps, leading implementation planning and ensuring adherence to architectural standards using React Native, Apollo, Combine.

• Utilized Redux for state management, resulting in a 25% reduction in code complexity and a 15% increase in team productivity.

• Designed and developed reusable components like Tree View, Chart, Table, Toggle and custom modules for future use using React Native, resulting in a 40% reduction in development time for new projects.

• Developed essential features for healthcare management app like OAuth authentication flow for Google and Facebook sign, push notifications, and real-time chat features using Firebase SDKs.

• Implemented configurable features using Firebase Remote Config.

• Optimized application performance and responsiveness by implementing techniques such as code splitting, lazy loading, and asynchronous data fetching, resulting in faster load times and improved user experience.

Bluebeam, Pasadena, CA

React Native Developer 02/2017 - 10/2018

• Architected, created, and maintained several internal tools used by the engineering and design departments of the team, ranging from full-stack projects to front-end single-page applications driven by APIs.

• Leveraged React Router and navigation to implement smooth app navigation, handle routing logic, and ensured a seamless user experience.

• Converted mobile applications from Native apps to React Native apps built by Swift, Java and Objective-C.

• Integrated AWS services into web applications and implemented AWS AppSync to create a GraphQL API to enhance performance and functionality.

• Implemented complex animations using GraphQL and Apollo Client to deliver the best UI/UX in mobile application development.

Peak Health Solutions, Franklin, NC

Mobile & Frontend Developer 08/2015 - 12/2016

• Part of a team that would plan, develop, and create web-and-mobile-based applications to match business objectives.

• Hands-on experiences of Android and iOS Mobile applications using Java, Kotlin and Swift and released to the product store.

• Wrote rich front-end interfaces for online applications and websites for large clients in industries including medical, insurance, and technology.

• Launched HTML, CSS, and JavaScript to create 100+ responsive landing pages for both company and client.

• Converted basic websites into SPA and made custom components using different frontend frameworks like Angular, Vue.js.

Skills

JavaScript (ES6+), Typescript

React.js, React Native

Redux, Redux-Saga, Redux-Thunk

Webpack, Babel, NPM/Yarn

RESTful API, GraphQL, JSON

User Experience, User Interface, Concept (UI/UX)

Next.js, Vite, Angular, Node.js, Express.js

Ionic, Expo, XCode, Android Studio, Gradle

Software Development Kit (SDKs)

Object-C, Swift, Java, Kotlin

MongoDB, MySQL, PostgreSQL, Firebase

Test-Driven Development, Jest, Mocha, Chai

Git, Azure, AWS, Docker/Kubernetes, Jenkins, CI/CD

Teamwork, Communication, Collaboration

Problem Solving Skills, Debugging, Workflows

Troubleshooting, Management Skills

Agile Development Methodologies

Education

Bachelor’s Degree of Computer Science & Information Engineering 09/2011-07/2015

National Taiwan University, Taipei, TW

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