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Hi, I’m Tien Chang Chiang (Charles). I’m a senior iOS and macOS engineer with 7+ years of experience delivering scalable, modularized, and secure applications for high-traffic platforms. I specialize in Swift, SwiftUI, MVVM-C, and Swift Package Manager, and I’ve maintained very low crash rates across 100k+ active users. I love mentoring engineers, collaborating with security, backend, and design teams, and building robust architectures. I actively explore AI-assisted tooling (Cursor, Antigravity, Claude Code) to accelerate delivery while preserving quality.…Hi, I’m Tien Chang Chiang (Charles). I’m a senior iOS and macOS engineer with 7+ years of experience delivering scalable, modularized, and secure applications for high-traffic platforms. I specialize in Swift, SwiftUI, MVVM-C, and Swift Package Manager, and I’ve maintained very low crash rates across 100k+ active users. I love mentoring engineers, collaborating with security, backend, and design teams, and building robust architectures. I actively explore AI-assisted tooling (Cursor, Antigravity, Claude Code) to accelerate delivery while preserving quality.

Tien Chang Chiang

PRO

Web Developer, Front-End Developer, Back-End Developer, +2

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Hi, I’m Tien Chang Chiang (Charles). I’m a senior iOS and macOS engineer with 7+ years of experience delivering scalable, modularized, and secure applications for high-traffic platforms. I specialize in Swift, SwiftUI, MVVM-C, and Swift Package Manager, and I’ve maintained very low crash rates across 100k+ active users. I love mentoring engineers, collaborating with security, backend, and design teams, and building robust architectures. I actively explore AI-assisted tooling (Cursor, Antigravity, Claude Code) to accelerate delivery while preserving quality.…Hi, I’m Tien Chang Chiang (Charles). I’m a senior iOS and macOS engineer with 7+ years of experience delivering scalable, modularized, and secure applications for high-traffic platforms. I specialize in Swift, SwiftUI, MVVM-C, and Swift Package Manager, and I’ve maintained very low crash rates across 100k+ active users. I love mentoring engineers, collaborating with security, backend, and design teams, and building robust architectures. I actively explore AI-assisted tooling (Cursor, Antigravity, Claude Code) to accelerate delivery while preserving quality.

Available to hire

Kaohsiung, Taiwan

Hi, I’m Tien Chang Chiang (Charles). I’m a senior iOS and macOS engineer with 7+ years of experience delivering scalable, modularized, and secure applications for high-traffic platforms. I specialize in Swift, SwiftUI, MVVM-C, and Swift Package Manager, and I’ve maintained very low crash rates across 100k+ active users.

I love mentoring engineers, collaborating with security, backend, and design teams, and building robust architectures. I actively explore AI-assisted tooling (Cursor, Antigravity, Claude Code) to accelerate delivery while preserving quality.

Skills

Experience Level

Expert

Expert

Expert

Expert

Language

Chinese

Fluent

English

Advanced

Japanese

Beginner

Work Experience

iOS Developer at Genesis Healthcare Co., Ltd.

December 1, 2021 - Present

Handled highly sensitive health data with HIPAA/GDPR alignment, including robust encryption for storage and secure transmission, and implemented strong user authentication flows. Established strict TDD workflows and automated CI/CD pipelines (Fastlane, GitHub Actions) with instrumentation to proactively monitor performance and maintain extremely low crash rates for high-traffic health features. Collaborated with security, backend, PMs, and designers to deliver scalable features end-to-end using SwiftUI and modern view hierarchies.

iOS & macOS Developer (Contract) at Teon LLC.

October 1, 2021 - April 1, 2023

Engineered a high-performance networking layer with custom VPN protocols and persistent sockets, enabling massive binary data streams with stable connectivity and crash-free UI updates. Optimized complex background processes to minimize battery drain and CPU usage. Implemented custom error correction logic to ensure reliable data delivery for real-time requirements.

iOS & Front-End Engineer at ICS GAME Co., Ltd.

January 1, 2021 - June 1, 2021

Launched iOS version from scratch with Swift, ensuring feature parity with the web platform. Built and optimized the web frontend using Vue.js and delivered a Progressive Web App to extend product reach and accessibility.

Front-End Engineer at Hamastar Technology Co., Ltd.

February 1, 2020 - August 1, 2020

Maintained and optimized large-scale remote learning platforms using Angular, ensuring high availability during peak traffic. Managed the architecture of multiple regional sub-sites to improve code maintainability and scalability.

iOS Engineer at HyperLight Digital Media Marketing Co., Ltd.

December 1, 2018 - July 1, 2019

Led Objective-C to Swift migration, modernizing the app architecture while maintaining backward compatibility. Introduced modular architecture guidelines to improve velocity and reduce debt; conducted rigorous PR reviews and maintained comprehensive documentation.

iOS Engineer at Kidtech Co., Ltd.

December 1, 2017 - July 1, 2018

Collaborated with backend teams to integrate complex Java Spring APIs and maintained public welfare apps. Focused on delivering smooth and intuitive user experiences.

iOS Engineer at Mycena Co., Ltd.

February 1, 2016 - November 1, 2017

Developed a comprehensive guide assignment system for travel agencies and built customized B2B property management apps to streamline daily operations.