Pizza Hut Indonesia is a large-scale Android consumer application designed to provide a seamless food ordering and dining experience. Built to support millions of users nationwide, the app enables customers to order Pizza Hut products for delivery, takeaway, and dine-in while enjoying rewards, promotions, and real-time order tracking. My Contributions - Maintained and enhanced all core application features across delivery, takeaway, and dine-in flows - Maintained and improved UI components to ensure consistent user experience - Fixed bugs and addressed production issues to improve application stability and performance Key Features: - Online ordering for Delivery, Takeaway, and Dine-In services. - Real-time Delivery tracking to monitor orders until arrival. - Loyalty program with SLICES rewards redeemable for Pizza, Pasta, and Snacks. - Scheduled Takeaway orders for quick pickup. - QR-based Dine-In ordering for table-side convenience. - Treasure Hut access for exclusive merchandise and promotional rewards. Tech Stack & Tools: Android, Kotlin, Android Jetpack, MVVM, Dependency Injection (Hilt), Retrofit, REST API, Firebase, Git

UnoDemo is a Flutter-based mobile demo app developed to showcase AI-powered identity verification technologies. Designed primarily for enterprise and client demo purposes, the app integrates multiple on-device machine learning models for real-time KYC processes using TFLite and advanced NFC-based data extraction. My Contributions - Engineered real-time Face Recognition and OCR using on-device TFLite models for secure and fast identity validation. - Built and integrated SIM Hologram Matching model for detecting hologram patterns on physical ID cards. - Integrated Passport Reader SDK with NFC to read data from ICAO-compliant ePassports. - Developed the entire UI/UX in Flutter, optimizing for cross-platform demo deployment. Key Features: - KYC Face Recognition (Liveness Detection Ready) - OCR for ID card data extraction - Hologram validation via AI - NFC-based ePassport reader (MRZ + chip read) Tech Stack & Tools: Flutter, TFLite, Dart, NFC SDK, Custom AI Models, REST API, VS Code, GitHub

UnoDigSig is a Flutter-based mobile demo app that showcases the implementation of Public Key Infrastructure (PKI) for secure digital signatures and encryption. Built to demonstrate secure data workflows, the app simulates digital signing processes relevant to official enforcement and governmental systems like Digital Korlantas. My Contributions - Integrated PKI library for digital signing, encryption, and decryption of sensitive user data. - Managed full data security lifecycle: key generation, certificate validation, secure transmission using APIs. - Supported client implementations by extending logic for Digital Korlantas Enforcer App, aligned with local regulatory needs. Key Features - Digital Signature via PKI (Private/Public Key flow) - Document encryption/decryption using asymmetric keys - Signature verification via secure server & offline modes - Modular PKI integration to external apps (e.g., Korlantas Enforcement) Tech Stack & Tools: Flutter, Dart, PKI SDK, REST API, AES/RSA, Secure Storage, Git, Bitbucket

mDL Reader is a Flutter-based mobile application designed to read and parse ISO-standard mobile Driver's Licenses (mDL) securely. Built to comply with international specifications, the app supports structured data parsing using CBOR, handles encrypted payloads with cryptographic techniques, and enables real-time consent handling via WebSocket. My Contributions - Implemented full support for ISO 18013-5 standard mobile driver’s license data reading. - Utilized CBOR (Concise Binary Object Representation) for decoding structured license data. - Applied encryption and decryption mechanisms to ensure data integrity and privacy. - Integrated WebSocket communication to observe real-time user consent approval flow when data is requested by the enforcer. - Designed modular Flutter UI/UX for easy data preview, scanning, and enterprise deployment. Key Features - Secure scanning and reading of digital driver licenses (mDL) - CBOR-based data decoding - Encrypted payload handling and key-based decryption - WebSocket integration for real-time consent observation and response - Modular, production-ready Flutter interface Tech Stack & Tools: Flutter, Dart, WebSocket, CBOR, ISO 18013-5, Cryptography Libraries, Secure Key Store, REST API, VS Code, Git

GreatDay (formerly SunfishGo) is a cloud‑based HRIS app used globally by enterprises. It seamlessly handles leave, attendance, payroll, shift schedules, claims, and employee attendance for both mobile and web. My Contributions - Built and maintained cross‑platform (Android + iOS) mobile modules using Ionic Framework. - Integrated AngularJS UI with Node.js backend APIs. - Ensured performance, polished UI, and offline resilience. Key Features Leave & Attendance, Overtime, Claims & Reimbursements, Payroll, Shift & Schedule Management Tech Stack & Tools: Ionic Framework, AngularJS, Node.js (Express), RESTful APIs, GitLab, SourceTree, VS Code

Axdif is an enterprise app that consolidates task boards, HRIS features, attendance tracking, business travel, and more into a unified mobile solution. My Contributions - Led Android features like task assignment, time tracking, approval workflows, and employee chat. - Designed and implemented HR and attendance modules using MVP and Retrofit. Key Features - Task Management (boards, workflows) - Real‑time Chat & Notifications - Mobile Attendance & Exceptions (lateness, no-shows) - Leave, Overtime, Reimbursements, Business Trip & Advance - Contract Management, Reports, Announcements, Document Repository, Approval Flows Tech Stack & Tools: Java & Kotlin, MVP pattern, Retrofit for API, SourceTree + Bitbucket, Android Studio

Xremo is a job portal tailored to the Malaysian market, offering job listings, candidate profiles, and access to local recruiters via Android app. My Contributions - Engineered job discovery, application submission, and user profile modules. - Improved app architecture by adopting MVVM, enabling clean separation of UI and data logic. Key Features - Real‑time job listings, search filters, and candidate matching - Resume & career dashboard - Job application, saved jobs, and interview scheduling Tech Stack & Tools: Kotlin, Java, MVVM architecture, Retrofit, LiveData, ViewModel, Cloud backend integration, Bitbucket, Android Studio

KlikDokter is Indonesia’s go-to digital health platform, offering services like doctor consultations, appointments, health articles, and an in‑app e‑pharmacy. My Contributions - Developed scalable Android modules using Kotlin, leveraging MVVM, Hilt, and Coroutines. - Integrated REST APIs via Retrofit for consultation, appointment, and prescription flows. - Collaborated with product and UI teams using Jira and Figma for feature planning and design. Key Features - Online doctor consultations, appointment booking, online drugstore - Integrated health tools (BMI calculator, fertility planner, etc.) - Word-class resource center with health articles and tools Tech Stack & Tools: Android Studio, Kotlin, MVVM + Hilt + Jetpack, Coroutines, Retrofit, Mattermost, GitLab

HalloBumil is Indonesia’s first interactive maternal health app, guiding moms through pre‑pregnancy planning, pregnancy tracking, and postnatal development. It features chat experiences and fertility tools. My Contributions - Led Android development for calendar, chat-based pregnancy tracker, and expert Q&A modules. - Added photo album, milestone tracking, and in‑app article access. Key Features - Fertility calendar & conception guidance - Timeline-style pregnancy tracker & daily dialog - Growth monitoring post-birth, expert chat, photo album, parenting tips Tech Stack & Tools: Kotlin, MVVM architecture, Jetpack libraries, Hilt, Retrofit, Android Studio

MOSHealth is an end-to-end pharmacy app that enables users to order prescription and OTC medication from nearby licensed pharmacies, with optional home delivery and real‑time status tracking. My Contributions - Built critical modules around prescription upload, pharmacy selection, and order tracking. - Implemented secure scanning and image adjustment for prescription capture and automated OCR validation. Key Features - Pharmacy locator with 1,000+ licensed pharmacies across Indonesia - Prescription upload & validation with verified delivery - Access to vitamins, medical devices, and medicine promosAppBrain Tech Stack & Tools: Kotlin, Retrofit, REST API, AndroidX, Firebase Storage, Kotlin Coroutines, Android Studio

KlikMedis is a professional-grade Electronic Medical Records (EMR/RME) platform used by clinics and doctors in Indonesia. It integrates with government health systems (SATU SEHAT, BPJS) and supports appointment scheduling. My Contributions - Built mobile modules allowing doctors to manage patient data, appointments, and conduct teleconsultations. - Integrated SATU SEHAT and BPJS APIs for secure government-linked data exchange. Key Features - Secure digital records: anamnesis, diagnosis, prescription - Appointment and queue scheduling with auto reminders - Payment processing, document signing, and compliance with Ministry of Health regulations Tech Stack & Tools: Kotlin, MVVM, Wi-Fi sync & REST API integration, Firebase, GitLab, Android Studio