Arnel Sinadhan

Audited and refactored a shared component library used across multiple application themes, resolving inconsistencies and establishing reusable, well-defined standards.Migrate erp system feature from a legacy interface to a modern web application implementing multi-step forms, validation workflows, and data-driven UI with global state management and form context. The standardized component library was subsequently adopted by the team across the broader migration effort.

Contributed key features in Phase 3 of a cross-platform digital media streaming application built with Flutter. Implemented Sign in with Apple for native iOS authentication, integrated AirPlay for wireless media casting to Apple devices, and enhanced the native video player on both iOS and Android — improving audio track selection, subtitle rendering accuracy, and overall playback control quality.

Architected and built a full-featured administration panel from the ground up for a digital content distribution platform. Core capabilities include original file uploads with thumbnail generation and mobile preview rendering, master file duplication with UUID management, bulk content registration via Excel processing, customer account management, and inquiry handling — all backed by paginated, filterable data tables.

Delivered a production-ready administration panel from the ground up, serving as the primary operational interface for the content distribution platform.

Designed and built a dedicated campaign management interface from the ground up to support promotional lucky draw operations. Features include campaign configuration, participant entry management, drag-and-drop file uploads, animated feedback via Lottie, and full multi-language support — all built with accessible, composable UI primitives.

Delivered a fully functional promotional campaign interface from scratch, enabling end-to-end management of the platform's lucky draw operations.

Designed and developed a responsive, Japanese-language marketing landing page from scratch for a digital content product. Structured across multiple pages — including a top page, a how-to-use guide, and an FAQ — with dedicated responsive layouts across mobile, tablet, and desktop breakpoints.

Delivered a polished, multi-page Japanese-language marketing site from scratch with full responsive support across all device sizes.

Architected and built the web-based administration panel from the ground up for a SaaS platform. Covers user management, OTP-based authentication flows, media and file management with drag-and-drop uploads, timezone-aware date filtering and reporting, cookie-based session handling, and full multi-language support.

Delivered the platform's primary web administration interface from the ground up, supporting day-to-day operational workflows.