Real-Time & Sockets5 WeeksiOS • Android
Penitans: Real-Time Consultant Booking & Secure Socket Workspace
Built a real-time messaging and video consultation workspace connecting clients with verified experts featuring instant WebSocket messaging and global Stripe billing.
Client
Penitans Global Solutions
Role
Lead Full-Stack Mobile Engineer
Timeline
5 Weeks
Platforms
iOS, Android
<50ms
Socket Latency
Stripe Global
Payment Gateways
100%
Message Delivery
Thousands
Live Sessions
The Core Engineering Challenge
- Mobile socket disconnects during network transitions (Wi-Fi to 5G) caused dropped messages and unnotified session interruptions.
- Integrating complex multi-currency escrow payment releases tied directly to session completion milestones.
Technical Solution & Implementation
- Engineered an auto-reconnecting WebSocket adapter layer in Dart with offline message staging queues and ACK delivery acknowledgments.
- Integrated native Stripe payment sheet wrapper supporting credit cards, Apple Pay, and Google Pay with automatic currency conversion.
- Designed a real-time calendar availability engine synchronizing international time zones accurately.
- Configured high-priority FCM push notifications waking up idle client devices for incoming consultation calls.
Technical Architecture Highlights
Resilient Socket.io Adapter
Heartbeat monitoring, exponential backoff reconnection, and client-side message deduplication.
Stripe Escrow Payment Pipeline
PCI-compliant payment intent authorization with automated capture upon session sign-off.
Technologies & Tools Used
FlutterSocket.io ClientStripe SDKFirebase Cloud MessagingRiverpodREST API
Measurable Business & Tech Results
- 100% reliable message delivery across thousands of live consultation sessions.
- Zero failed transactions across 20+ countries and currencies.
- Under 50ms average socket round-trip messaging latency.
Built a real-time messaging and video consultation workspace connecting clients with verified experts featuring instant WebSocket messaging and global Stripe billing.
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