@ PayHack 2025 - PayNet Intervarsity Hackathon
PayHack 2025 - OpenPayment System
Developed a cutting-edge cross-border payment application for PayHack 2025, Malaysia's largest Intervarsity Hackathon organized by PayNet. Built a comprehensive mobile app with 37+ screens featuring multi-network QR payments (DuitNow, PayNow, UPI, PromptPay, QRIS), ZKP biometric authentication, AI-powered identity verification, and deepfake detection. Tackled the 'Payments without Borders' challenge to build next-generation non-card payments.
Duration
2 months (June - August 2025)
Team Size
Team of 5 (Mobile Frontend Developer)
My Role
Mobile Frontend Developer
Project Gallery
The Problem
Cross-border payments remain fragmented with different QR standards across Southeast Asia (DuitNow in Malaysia, PayNow in Singapore, UPI in India, PromptPay in Thailand, QRIS in Indonesia). Users face high FX fees, security vulnerabilities in identity verification, and lack of privacy-preserving authentication methods. Traditional payment apps expose biometric data and are vulnerable to deepfake attacks.
The Solution
Built a unified cross-border payment platform with React Native/Expo featuring dual login for personal users and merchants, multi-network QR code support routing payments across 5 Southeast Asian payment networks, Zero-Knowledge Proof (ZKP) biometric authentication where biometric templates never leave the device unencrypted, AI verification service for identity document OCR and facial recognition, deepfake detection to prevent spoofing attacks, and UEBA behavioral analytics for anomaly detection. Integrated ESG T+ Tree investment tracking feature.
Technical Highlights
PayHack 2025 Grand Finalist - Malaysia's largest Intervarsity Hackathon by PayNet
Built 37+ mobile screens with React Native 0.79.2 and Expo SDK 53
Implemented Zero-Knowledge Proof (ZKP) biometric authentication using Rust and Bulletproofs
Developed AI verification service with FastAPI for ID document OCR, face recognition, and liveness detection
Built deepfake detection system analyzing visual, audio, and temporal consistency
Created UEBA (User and Entity Behavior Analytics) for behavioral anomaly detection and risk scoring
Integrated 5 cross-border payment networks: DuitNow, PayNow, UPI, PromptPay, QRIS
Implemented multi-platform ZKP bindings for Android (JNI), iOS (FFI), Node.js, and WebAssembly
Privacy-first design - biometric data stays on device with 128-dim embeddings
ESG integration with T+ Tree investment tracking feature
Impact & Results
PayHack 2025 Grand Finalist - Top teams out of hundreds of participants
Built production-ready MVP with 37+ screens in React Native
Unified 5 Southeast Asian payment networks in single platform
Privacy-preserving ZKP authentication - biometrics never leave device
Multi-layered security: ZKP + AI verification + Deepfake detection + UEBA