Integra PratamaJul 2024 — Jul 2025Qios FnB
Self-service ordering
- Self-service ordering
- Version 2
- Grab on the dashboard
SUNMI K2
Selected products.
Personal products and team contributions. Open a project for scope, platforms, and links.
Personal project2026
MoneyRoo
Personal finance, across mobile and web
- Income, expenses, savings
- Category budgets
- iOS, Android, and web
Project details
MoneyRoo is a personal finance app that helps you manage your money. It provides a simple and intuitive interface for tracking your income, expenses, and savings. I build the full-stack product, including its landing page and Expo application available on mobile and web.
- Role
- Full-stack Developer
- Period
- 2026
- Tools & platforms
- Expo · Android · iOS · Web app · Landing page
Personal project2026
Spliteroo
Split bill app
- Split a bill
- Shared trips
- Settle who paid
Project details
Spliteroo is a modern bill-splitting app that makes it easy to split expenses with friends and family. I build the product across its mobile apps, landing page, and Convex backend.
- Role
- Full-stack Developer
- Period
- 2026
- Tools & platforms
- Android · iOS · Landing page · Convex
- Products, orders, and payments
- Inventory for a small shop
- Android, iOS, and web
Personal project2024InvenceInventory management for small businesses
Invence is an application that allows users to create and manage their own inventory. It provides a simple and intuitive interface for managing products, orders, and payments. Designed to be scalable and easy to use for both small and large businesses.
- Role
- Mobile Developer
- Period
- 2024
- Tools & platforms
- Android · iOS · Web
- Anime search
- Personal watchlist
- MyAnimeList sync
Personal project2021RisutoYour anime, organized
Risuto is a comprehensive anime list app designed to simplify your anime-watching experience. Search for your favorite titles, explore detailed information, and effortlessly add them to your personal watchlist. With a user-friendly interface and access to the vast MyAnimeList database, Risuto makes it easy to discover and organize your anime collection. Authenticate with your MyAnimeList account to seamlessly sync your lists across devices.
- Role
- Mobile Developer
- Period
- 2021
- Tools & platforms
- Android · MyAnimeList
- Discover a car
- Book a rental
- Drive
Work at
WAHDAHAug 2025 — PresentWAHDAHCar rental app
Contributed to WAHDAH’s customer car rental app as part of the mobile team, developing Android and iOS experiences with Kotlin and Swift.
- Role
- Mobile Developer
- Period
- Aug 2025 — Present
- Tools & platforms
- Kotlin · Swift · Flutter
- Manage rentals
- Coordinate operations
- Deliver the car
Work atWAHDAHAug 2025 — PresentDRIVEOCar rental operations
Contributed to DRIVEO, WAHDAH’s car rental operations product, alongside colleagues and senior developers on Android and iOS.
- Role
- Mobile Developer
- Period
- Aug 2025 — Present
- Tools & platforms
- Kotlin · Swift · Flutter
Freelance
- Sale and rental listings
- Location search
- Community discussions
Freelance projectJul 2026Hoome.idProperty listings in Indonesia
An Indonesian property platform for sale and rental listings, with location search and community discussions.
- Role
- Team contribution
- Period
- Jul 2026
- Tools & platforms
- Web
- Social media editor
- Renderer
- Scheduler
Freelance projectSep 2026MerapiMediaSocial Media Editor, Renderer, Scheduler
- Flight simulation
- Aircraft lessons
- Android and iOS
Freelance project2025Da CapoInteractive aviation learning
An interactive learning application focused on flying planes and aviation. Features include flight simulation, educational content about aircraft, and interactive lessons for aspiring pilots.
- Role
- Mobile Developer
- Period
- 2025
- Tools & platforms
- Kotlin · Android · SwiftUI · iOS
- Restaurant discovery
- Live order tracking
- Payments
Freelance project2025RocketdeliFood delivery in Vietnam
A Vietnam food delivery application connecting users with local restaurants. Features include real-time order tracking, secure payments, restaurant discovery, and delivery management.
- Role
- Flutter Developer
- Period
- 2025
- Tools & platforms
- Flutter · Dart · Google Maps · Firebase
- Attendance and leave
- Employee data
- Payroll
Freelance project2025BackofficeHRIS for Badan Standardisasi Nasional
A comprehensive HRIS (Human Resource Information System) application for managing employee data, attendance, payroll, and organizational structure. Features include analytics dashboards, role-based access control, and seamless integration with existing systems.
- Role
- Flutter Developer
- Period
- 2025
- Tools & platforms
- Flutter · Dart · Firebase · Supabase
- Gaming gift cards
- Checkout
- Instant delivery
Freelance project2024SaldogameGaming gift cards, made simple
A gaming gift card purchasing application that allows users to buy gift cards for various games. Features include secure payment processing, instant delivery, and a streamlined checkout experience.
- Role
- Flutter Developer
- Period
- 2024
- Tools & platforms
- Flutter · Dart · Firebase
- Call recording
- Auto-replies
- Korean language support
Freelance project2024EldaA Korean call assistant
A Korean call assistant application designed to help users manage and enhance their calling experience. Features include call recording, intelligent assistant features, and seamless Korean language support.
- Role
- Mobile Developer
- Period
- 2024
- Tools & platforms
- Kotlin · Android
Experience
WAHDAHMobile DeveloperAug 2025 — Present
- Collaborate with colleagues and seniors to develop the main business products, DRIVEO and WAHDAH, using Android Kotlin and iOS Swift.
- Teach and supervise intern and junior mobile developers on the Workbeat HRIS Flutter project.
Integra PratamaAndroid DeveloperJul 2024 — Jul 2025
- Worked on Qios FnB’s migration to v2 and the Qios dashboard’s Grab integration.
- Independently revamped the Qios POS cashier experience for LANDI C20 and M20 devices.
- Developed hybrid apps with Flutter Blocs, Go Router, and Freezed.
- Developed a serverless backend using MongoDB and Firebase Cloud Functions.
LucyAndroid DeveloperMay 2023 — May 2024
- Designed and developed waiter and invoice Android apps from scratch using Kotlin and Android Studio.
- Contributed to the dashboard web application using Vue.
- Helped develop the cashier Android application.
- Worked with Android Jetpack, Clean Architecture, Firestore, Room, and Realm.
AI & automation
Hermes · ROG Ally · Telegram · Personal workflows
Mobile apps
Kotlin · Swift · Flutter · React Native
Web & landing pages
Next.js · React · Vue
Backend & APIs
Node.js · Firebase · Convex
About
I'm Alexander William, a software engineer and AI enthusiast based in Jakarta. I build mobile apps, websites, and landing pages.
I enjoy turning ideas into real products, testing them quickly, and improving the small details through real feedback.
Read my introduction