SABI
Waste management app with reward points system
Overview
SABI (Sampah Bisa Jadi Berarti) is a mobile-based waste management application that encourages recycling through point rewards, marketplace transactions, and community-driven sustainability in Malang City. Developed as part of Internship Raion 2025, the app empowers users to turn everyday waste into meaningful contributions through recycling incentives, donations, and local UMKM support. Users can donate waste to earn reward points, exchange points for money, purchase recycled UMKM products, or donate to orphanages. The app also includes scheduled waste pickup requests, daily collection route visualization, educational content, and gamified eco-challenges. Built using Kotlin and Jetpack Compose with Clean Architecture and powered by Firebase services for real-time synchronization.
Problems
Ineffective waste management in Malang City
Waste management in Malang remained inefficient due to low public awareness, manual collection processes, and the absence of an integrated digital platform connecting citizens, recycling communities, and UMKM businesses.
No incentive system to encourage recycling behavior
Residents lacked a digital platform that rewarded recycling efforts. Without clear incentives such as points, money, or redeemable products, participation in waste sorting and recycling stayed low.
Delivering a production-ready app within 3 weeks
The team had a very limited development timeline to build a complete Android application with multiple interconnected features while maintaining production-quality architecture and user experience.
Serving multiple stakeholders in one platform
The application needed to support different user groups — citizens, waste collection communities, orphanages, and UMKM businesses — each with unique workflows and system requirements.
Solutions
Waste-to-point reward ecosystem
Designed a circular reward system where users earn points from waste donations, then redeem them as cash, use them for marketplace purchases, or donate them to orphanages to encourage sustainable recycling behavior.
Waste pickup scheduling with route visualization
Implemented a scheduled pickup request feature for large waste donations above 5kg, combined with daily route visualization to connect citizens directly with waste collection communities.
Clean Architecture for scalable development
Applied Clean Architecture with presentation, domain, and data layers to maintain scalability and code maintainability during rapid feature development under a tight timeline.
Firebase-powered real-time infrastructure
Integrated Firebase Authentication and Firebase Realtime Database to handle user management, point balances, waste records, marketplace listings, and real-time synchronization without building a custom backend.
Contributions
Implemented the entire mobile application business logic and data flow using Kotlin following Clean Architecture principles
Integrated Firebase Authentication for user registration, login, and session management across the application
Connected Firebase Realtime Database with Jetpack Compose UI components for real-time synchronization of points, waste records, and marketplace data
Handled application state management including loading, success, empty, and error states across multiple features
Implemented core workflows such as waste donation submission, point calculation, marketplace transactions, donation requests, and eco-challenge tracking
Integrated Uploadcare for image upload and storage in waste donation and marketplace flows
Features
Waste to Point System
Users can exchange sorted waste into reward points that can later be redeemed as cash, marketplace products, or charitable donations.
Recycled Product Marketplace
Marketplace feature for purchasing recycled UMKM products using points or direct payment while supporting local sustainable businesses.
Waste Pickup Scheduling
Allows users to request scheduled waste pickup for large donations with route visualization and collection tracking.
Gamification & Eco Challenges
Daily eco-challenges and reward systems designed to increase user engagement and encourage consistent recycling habits.
Environmental Education
Educational content and external learning resources about recycling practices, waste management, and environmental sustainability.
Donation to Orphanages
Feature allowing users to donate points or monetary contributions directly to orphanages and social causes.
Tech Stack
- Kotlin
- Jetpack Compose
- Firebase
- UploadCare
Gallery
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Results
90% MVP Completion in 3 Weeks
Successfully delivered around 90% of planned MVP features within the internship timeline while meeting sprint objectives and maintaining production quality.
Production-Ready Android Application
Built a functional Android application using Kotlin, Jetpack Compose, Clean Architecture, and Firebase integration with multiple interconnected modules.
Accepted as App Programmer at Raion
Project contribution and technical performance led to acceptance as an App Programmer Member at Raion Community, Faculty of Computer Science, Universitas Brawijaya.
Sustainability-Focused Community Platform
Delivered a platform connecting citizens, UMKM businesses, and waste collection communities to encourage sustainable waste management in Malang City.