Looks like you have JavaScript disabled. For the full Twine experience, you will need to re-enable it.

I'm a highly motivated software developer with 4+ years of experience delivering high-impact mobile applications using Swift and SwiftUI. I have hands-on experience shipping native iOS features and collaborating with cross-functional teams to produce polished, crash-free apps. My background spans iOS and web development, including React and TypeScript, and I enjoy turning complex problems into clean, efficient interfaces. I am passionate about continuous learning and keeping pace with evolving mobile technologies to optimize performance and user engagement.…I'm a highly motivated software developer with 4+ years of experience delivering high-impact mobile applications using Swift and SwiftUI. I have hands-on experience shipping native iOS features and collaborating with cross-functional teams to produce polished, crash-free apps. My background spans iOS and web development, including React and TypeScript, and I enjoy turning complex problems into clean, efficient interfaces. I am passionate about continuous learning and keeping pace with evolving mobile technologies to optimize performance and user engagement.

Chien Hsi Yao (Kevin)

App Developer, Developer, Programmer, +4





I'm a highly motivated software developer with 4+ years of experience delivering high-impact mobile applications using Swift and SwiftUI. I have hands-on experience shipping native iOS features and collaborating with cross-functional teams to produce polished, crash-free apps. My background spans iOS and web development, including React and TypeScript, and I enjoy turning complex problems into clean, efficient interfaces. I am passionate about continuous learning and keeping pace with evolving mobile technologies to optimize performance and user engagement.…I'm a highly motivated software developer with 4+ years of experience delivering high-impact mobile applications using Swift and SwiftUI. I have hands-on experience shipping native iOS features and collaborating with cross-functional teams to produce polished, crash-free apps. My background spans iOS and web development, including React and TypeScript, and I enjoy turning complex problems into clean, efficient interfaces. I am passionate about continuous learning and keeping pace with evolving mobile technologies to optimize performance and user engagement.

Available to hire

I’m a highly motivated software developer with 4+ years of experience delivering high-impact mobile applications using Swift and SwiftUI. I have hands-on experience shipping native iOS features and collaborating with cross-functional teams to produce polished, crash-free apps.

My background spans iOS and web development, including React and TypeScript, and I enjoy turning complex problems into clean, efficient interfaces. I am passionate about continuous learning and keeping pace with evolving mobile technologies to optimize performance and user engagement.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Language

English

Advanced

Chinese

Fluent

Spanish; Castilian

Advanced

Work Experience

iOS Developer at AccelOne

March 1, 2023 - Present

Led the development of a financial well-being native iOS application for Meta employees, utilizing Swift, SwiftUI, and MVVM architecture in an Agile environment. Increased user engagement by 40% and supported over 5,000 active users at launch. Improved app performance by 30% through Grand Central Dispatch, code optimization, and efficient data handling across 20+ screens. Integrated Realm database for offline capabilities and data persistence, enhancing responsiveness. Ensured accessibility compliance with Dynamic Type and VoiceOver support, boosting user satisfaction by 30%. Maintained high code quality through unit testing and debugging with XCTest and MockingBird, ensuring stability and scalability.

iOS Developer at Tienda Crypto

March 1, 2023 - July 30, 2025

Built and maintained a cryptocurrency exchange iOS platform using Swift, SwiftUI, and MVVM, achieving a 4.8-star rating from 1,500+ downloads within the first month. Reduced post-launch bugs by 75% through rigorous unit testing and continuous integration, improving app stability for over 10,000 active users. Managed beta distribution with TestFlight, improving feedback turnaround by 50% and enabling faster iterations. Enhanced app performance and transaction reliability by optimizing code for real-time data handling and monitoring.

Front End Developer at Tienda Dolar

January 1, 2021 - July 30, 2025

Developed and maintained responsive web components using TypeScript, SCSS, HTML, and Angular. Achieved a 20% page speed improvement and enhanced user experience. Led front-end development of a high-performance currency exchange platform, boosting transaction speed by 30% and improving user satisfaction to over 90%. Collaborated closely with UI/UX designers and product teams to ensure pixel-perfect implementation aligned with Figma specifications, increasing customer engagement by 40%.

Front-End Developer at Tienda Crypto

January 1, 2021 - October 13, 2025

Designed and developed dynamic, responsive user interfaces using Angular, TypeScript, JavaScript, SCSS, and HTML. Built scalable front-end features ensuring seamless UI/UX and cross-browser compatibility. Leveraged modern front-end frameworks and best practices to enhance application performance and efficiency. Optimized UI components and improved page loads through efficient coding and performance tuning. Collaborated with UI/UX designers, back-end developers, and stakeholders to deliver high-quality features.

iOS Developer at Tienda Crypto

January 1, 2023 - October 13, 2025

Managed a team of 2 developers and conducted code reviews to ensure code quality, design standards, and industry best practices. Independently built a crypto exchange native iOS application (MVP) with a crash-free rate exceeding 99%.

iOS Developer at AccelOne

January 1, 2025 - October 13, 2025

Deployed 10+ major features for native iOS apps using Swift, SwiftUI, and UIKit. Collaborated with QA to implement automated testing procedures, resulting in a 20% decrease in post-release bugs. Achieved 80%+ code coverage through comprehensive unit testing. Used SwiftUI's declarative syntax to create dynamic adaptive UI components, enhancing visuals and reducing development time by 30%.

Software Developer at AccelOne

January 1, 2025 - Present

Developed enterprise email security solutions for Microsoft Outlook (Office Add-in) and Gmail (Chrome Extension) using React, TypeScript, and platform-specific APIs with real-time encryption features.