I am a Flutter Developer with a proven track record of launching and optimizing production-ready mobile applications. With hands-on experience developing fintech-related apps (Piggy Log) and utility tools (Stitch Log), I specialize in refining UI/UX consistency, debugging complex navigation flows, and ensuring app stability. My background as an Operations Team Lead gives me a unique perspective on translating business needs into technical solutions while maintaining strict attention to detail. I have extensive experience in performance optimization and bug fixing, which is critical for the final pre-launch phase of a mobile application. I am ready to contribute immediately to finalizing your mobile wallet experience with high-quality, maintainable code. Key Expertise: Flutter/Dart State Management (GetX) Offline-first architecture with SQLite (Relational design & mapping) Responsive UI/UX refinement and debugging Multi-language support and global app localization

Terry (Yonghyuk) Yoon

I am a Flutter Developer with a proven track record of launching and optimizing production-ready mobile applications. With hands-on experience developing fintech-related apps (Piggy Log) and utility tools (Stitch Log), I specialize in refining UI/UX consistency, debugging complex navigation flows, and ensuring app stability. My background as an Operations Team Lead gives me a unique perspective on translating business needs into technical solutions while maintaining strict attention to detail. I have extensive experience in performance optimization and bug fixing, which is critical for the final pre-launch phase of a mobile application. I am ready to contribute immediately to finalizing your mobile wallet experience with high-quality, maintainable code. Key Expertise: Flutter/Dart State Management (GetX) Offline-first architecture with SQLite (Relational design & mapping) Responsive UI/UX refinement and debugging Multi-language support and global app localization

Available to hire

I am a Flutter Developer with a proven track record of launching and optimizing production-ready mobile applications. With hands-on experience developing fintech-related apps (Piggy Log) and utility tools (Stitch Log), I specialize in refining UI/UX consistency, debugging complex navigation flows, and ensuring app stability.

My background as an Operations Team Lead gives me a unique perspective on translating business needs into technical solutions while maintaining strict attention to detail. I have extensive experience in performance optimization and bug fixing, which is critical for the final pre-launch phase of a mobile application. I am ready to contribute immediately to finalizing your mobile wallet experience with high-quality, maintainable code.

Key Expertise:

Flutter/Dart State Management (GetX)

Offline-first architecture with SQLite (Relational design & mapping)

Responsive UI/UX refinement and debugging

Multi-language support and global app localization

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Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate

Language

Korean
Fluent
English
Advanced
Japanese
Intermediate
Thai
Intermediate

Work Experience

Operations Team Lead at TJOEUN Academy
September 1, 2017 - June 1, 2024
Led day-to-day operations while collaborating with in-house developers to translate on-site operational needs into clear technical requirements. Served as a bridge between operations and engineering, improving cross-functional collaboration. Identified workflow bottlenecks from field data and user feedback, proposing system-level improvements that contributed to approximately 10% efficiency gains. Coordinated discussions among technical and non-technical stakeholders to align priorities, scope, and constraints.

Education

K-Digital Training Program – Full-Stack Web & Mobile Development at K-Digital Training Program
June 1, 2024 - February 1, 2025

Qualifications

Add your qualifications or awards here.

Industry Experience

Software & Internet, Media & Entertainment, Education, Professional Services