About M
Senior iOS Engineer with 10+ years of experience building large-scale iOS apps for retail, POS, and restaurant systems. I specialise in Swift/UIKit, end-to-end delivery (requirements → design → implementation → testing → App Store release → maintenance), and reliable hardware integrations (receipt printers, barcode scanners, payment terminals) via vendor SDKs and Bluetooth/Wi-Fi.
I’ve led client-facing requirement workshops, translated business needs into technical specs, and supported production through defect analysis using logs/crash reports. Typical deliverables include new feature development, refactoring, QA/test specs, release management, and long-term maintenance.
Languages: Cantonese (fluent), Japanese (expert), Mandarin (expert), English (business).
Japanese
Fluent
English
Conversational
Cantonese
Native or bilingual
Chinese
Fluent
Remote only
Primarily works remotely
Experience
- POSTAS Limited (Japan)Senior iOS DeveloperRESTAURANTS AND FOOD SERVICEApril 2016 - November 2025 (9 years and 7 months)Tokyo, Japan• • Developed and maintained iOS applications for retail and restaurant solutions, including POS systems, ordering systems, self-ordering systems, and digital membership applications.• • Led requirements definition by working directly with clients through meetings and workshops; translated business needs into functional specifications and technical requirements.• • Contributed across the full development lifecycle: system design, implementation, test specification creation, App Store release, maintenance, defect investigation, bug fixes, and API integration.• • Designed, implemented, and tested integrations with external devices (receipt printers, barcode scanners, payment terminals) using vendor SDKs and wireless communication (Bluetooth, Wi-Fi).• • Designed and executed unit, integration, and system testing, ensuring quality across multiple iOS versions, devices, and external hardware.• • Performed defect analysis using logs and crash reports; collaborated with developers and vendors to resolve issues efficiently.• • Managed App Store submissions, release processes, version control, and internal technical support.• • Acted as a team lead, coordinating development and testing tasks, supporting continuous product improvement, and managing schedules with cross-functional teams. Tech Stack: Swift, Objective-C, PHP, JavaScript, MySQL, PostgreSQL Version Control: Git
- S-cubism Inc. (Japan)iOS EngineerDecember 2013 - March 2016 (2 years and 3 months)Tokyo, Japan• • Developed and maintained iOS applications for retail and restaurant systems.• • Involved in the full SDLC including requirements, implementation, testing, and App Store release.• • Implemented new features, bug fixes, and API integrations.• • Supported releases, version control, and internal technical support.
- EIT Co., Ltd. (Japan)iOS Application Engineer / Software EngineerApril 2011 - December 2013 (2 years and 8 months)Tokyo, JapanRestaurant Ordering System Development• • Investigated and fixed issues in iOS applications and web-based dashboards.• • Designed and implemented new iOS features.• • Managed releases, version control, and documentation. Objective-C
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Education
- Information Systems / Business Information Systems (Certificate of Higher Education)2011Information Systems / Business Information Systems (Certificate of Higher Education)
- App Development with Swift Certified User(Apple Inc.2023App Development with Swift Certified User