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Feb 2021 – Jan 2022·Green Wallet · London, UK (Remote)·Employment
GreenWallet
B2C and B2B sustainable shopping platform with loyalty rewards.
KotlinMVPRetrofitFirebaseBiometric AuthZXingMaterial Design 3JUnitEspresso
Designed, implemented, maintained, and tested both B2C and B2B GreenWallet Android applications from scratch with CI/CD methodology at Green Wallet, a London-based fintech startup.
- —Green Coins loyalty rewards system
- —Biometric (Face/Touch ID) and PIN authentication
- —Card scanning and payment processing
- —Order tracking and QR code scanning
- —Firebase Remote Config for feature flags
- —Product catalog management
- —Campaign creation and management
- —Order processing and checkout flows
Both apps built in Kotlin with MVP architecture, clean separation of concerns, and kept battery usage low by designing views from scratch to avoid overdrawing and limiting background processes.