Problem & Challenge
Despite its growing adoption, the platform faced several limitations:
- There was no mobile application, limiting accessibility for mobile-first users.
- Deals posted by users had no expiration logic, resulting in stale or unfulfilled offers remaining visible.
- The absence of real-time, context-aware notifications meant users often missed key updates, leading to reduced engagement and delayed actions.
The goal was to develop a seamless mobile experience, introduce automated lifecycle control for deals, and provide intelligent notification delivery that aligned with user's actions and preferences.
My Role
I led the development of the mobile application, implemented the deal auto-expiry system, and designed the advanced notification infrastructure.
Mobile Application Development
- Designed and developed the mobile application from the ground up, providing feature parity with the web platform.
- Enabled users to complete KYC, create and accept deals, view live exchange rates, manage wallet balances, and track transaction history in a responsive and intuitive interface.
- Ensured secure API communication and seamless integration with backend services for data synchronization and user actions.
Deal Auto-Expiry System
- Implemented a configurable expiry mechanism allowing users to define how long their posted deals should remain active (e.g., 72 hours).
- Built backend support for monitoring and invalidating expired deals using scheduled tasks and background job queues.
- Integrated expiry indicators and countdown timers into the frontend interface to provide clarity and urgency for active deals.
Advanced Notification System
- Developed a modular, event-driven notification service to handle deal-related events such as acceptance, expiry, and completion.
- Integrated both push and in-app notification channels, ensuring users received timely alerts even when offline.
- Added support for pre-expiry reminders, new match notifications, and rate movement alerts.
- Designed the service with extensibility in mind, allowing easy configuration for localization, retry logic, and user preferences.
Outcome and Impact
- Significantly improved mobile engagement and retention by providing a reliable and accessible experience on smartphones.
- Reduced inactive and outdated deals on the platform, improving visibility of active opportunities and increasing fulfillment rates.
- Enhanced user responsiveness and platform trust through timely, actionable notifications tied to individual user behavior.
- Created a scalable foundation for future notification-based features such as referral rewards, rate tracking, and compliance alerts.
Technologies Used
- Mobile: React Native
- Backend: Node.js, NestJS, TypeScript
- Scheduling: Cron jobs, background workers
- Notifications: Firebase Cloud Messaging (FCM), in-app notification service
- Database: PostgreSQL
- CI/CD: Github CI/CD, Docker
- Monitoring: Sentry, custom logs and alerts
- Security: Encrypted API transport, KYC and verification integrations