JEONG SEONHAN
91, Godeokgukje 8-ro, Pyeongtaek-si, Gyeonggi-do,Rep. of KOREA
Summary
Android developer with 5+ years of experience in commercial app development and service operations across mobile, tablet, and wearable environments. Experienced in launching, maintaining, and improving commercial applications with over 100,000 cumulative downloads, as well as in cross-service integration and usability enhancement. Interested in extending this practical experience into graduate study in industrial engineering / industrial management engineering, with a focus on data-driven decision making, user behaviour analysis, and system improvement.
Overview
6
6
years of professional experience
Work History
Android Developer
ETOOS Education
Seoul, Rep. of KOREA
02.2023 - 06.2025
- Developed and maintained commercial education applications, including a lecture player, vocabulary learning app, integrated membership SDK, and digital workbook service.
- Supported the full lifecycle of mobile services, including feature development, deployment, legacy improvement, in-app purchase integration, and production issue response.
- Worked on common app architecture, cross-service integration for membership, payment, notifications, and documentation for development conventions and onboarding.
Android/iOS App Developer
Grow Corporation
Seoul, Rep. of KOREA
11.2022 - 02.2023
- Maintained Android and iOS applications for an adult self-development and online learning platform, with e-commerce characteristics.
- Worked on SDK updates, push notification improvements, legacy refactoring, and production issue responses in a service environment where user engagement and marketing-related performance were important.
Software Engineer
TecAce Solution
Seoul, Rep. of KOREA
12.2019 - 08.2022
- Developed Android, Wear OS, and Tizen applications across navigation, retail experience, and device-specific UX projects.
- Worked with MVVM, RoomDB, analytics tools, and cross-device service structures, while collaborating with external partners on location-based and navigation-related features.
Education
Bachelor of Science - Computer Software Engineering
Dongyang Mirae University
Seoul01-2021
Associate Degree - Computer Information
Hanyang Women’s University
Seoul01-2020
Skills
- Mobile application development (Android, iOS, and Wear OS)
- Kotlin, Java, MVVM, RoomDB, Retrofit, and Jetpack Compose
- Service maintenance, performance optimisation and production issue response
- API-based, database-linked, and multi-source data integration
- User behaviour data collection, service log analysis, and usability improvement
- Team collaboration, documentation, and client communication
Research Interests
I am interested in data-driven decision making for service and industrial systems, particularly in user behaviour analysis, operational optimisation, quality and reliability analysis, and predictive maintenance.
Selected Projects
Di-ON | ETOOS Education | 2024–2025
- Contributed to the development of a digital workbook application supporting PDF-based learning, handwriting annotation, and practice workflows based on custom and transformed questions.
- Conducted technical research on PDF and note-taking solutions and worked on cross-service integration with membership, payment, and notification services.
Wordmaster Learning App | ETOOS Education | 2023–2025
- Maintained and improved an English vocabulary learning application supporting word study, memorisation-focused learning flows, and user-created vocabulary books.
- Worked on feature updates, issue response, release management, and in-app purchase support for stable service operations.
ETOOS Lecture App | ETOOS Education | 2023–2025
- Contributed to the development and operation of an online lecture player application used for commercial education services.
- Worked on usability improvement, legacy code maintenance, and SDK integration to support stable playback and service delivery.
ETOOS Integrated Membership SDK | ETOOS Education | 2023–2025
- Maintained a WebView-based integrated membership SDK supporting login services, WebView optimisation, log handling, token validation and reissuance, and social login SDK updates.
- Gained experience in authentication flows, cross-service integration, and operational stability across multiple applications.
Grow | Grow Corporation | 2022–2023
- Contributed to the maintenance and operation of an adult self-development learning platform with e-commerce characteristics for content delivery and user engagement.
- Worked on SDK updates, push notification improvement, legacy refactoring, and production issue response in a marketing-oriented platform environment.
Naver Map & Navigation for Wear OS | TecAce / Naver / Samsung | 2021
- Developed features for a Wear OS navigation application in collaboration with partner organisations, including turn-by-turn guidance, search, favourites, and history.
- Worked on location-related features, local data handling with RoomDB, analytics integration, and asynchronous processing for navigation flows.
Accomplishments
- Industry Award, Capstone Design, Hanyang Women’s University, 2019
- Encouragement Prize, EVE ICT Mentoring, 2019
Timeline
Android Developer
ETOOS Education
02.2023 - 06.2025
Android/iOS App Developer
Grow Corporation
11.2022 - 02.2023
Software Engineer
TecAce Solution
12.2019 - 08.2022
Bachelor of Science - Computer Software Engineering
Dongyang Mirae University
Associate Degree - Computer Information
Hanyang Women’s University