Freelance & Personal · Mobile App Development

Rabbet (Paylink) — FinTech App

Secure payment application with OTP-based authentication and payment workflows for the Egyptian market.

Overview

Built core features of a secure payment application with OTP-based authentication and seamless transaction workflows for the Egyptian market.

Problem

Financial users in Egypt required a reliable mobile payment mechanism with rapid OTP authentication, zero transaction dropouts, and encrypted payload delivery.

Solution

Engineered native Android payment workflows in Kotlin with Retrofit REST APIs and Firebase verification. Optimized payload encryption and network state management to guarantee financial transaction integrity.

Features

OTP-based Secure Authentication
Real-time Transaction Workflows
Bank & Gateway REST Integration
Google Play Live (1,000+ Downloads)

Architecture

MVVM Architecture, Security Encryption Layer, Retrofit Interceptors, Firebase Authentication.

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