Case Study
FlowChat Messenger
A next-generation messaging platform engineered for instant delivery and seamless cross-platform synchronization.
The Challenge
Understanding the Problem
Our Approach
The Solution
Custom WebSocket implementation with a Redux-based state management system. Built-in message queue with exponential backoff for reliable delivery even in challenging network conditions.
- <50ms Message Latency
- 99.99% Uptime
- 500K+ Daily Active Users
The Outcome
Achieved sub-50ms message delivery in optimal conditions with 99.99% delivery success rate. The platform now handles 500K+ daily active users with zero message loss.
Impact: 500K+ Daily Users
Technical Deep Dive
Engineering Excellence
A comprehensive look at the technical architecture and implementation details that power this solution.
architecture
Built on a Microservices architecture using Docker containers. Implemented a custom 'Message-Queue' logic for offline delivery with automatic retry and deduplication.
security
End-to-end Signal Protocol implementation for private chats. Zero-Knowledge storage ensures even NovaGen cannot read user messages. Full GDPR compliance.
System Architecture
Client App
Flutter/React Frontend
Load Balancer
Nginx / AWS ELB
WebSocket Gateway
Node.js Cluster
Redis Pub/Sub
Message Broker
PostgreSQL
Persistent Storage
Development Journey
From Concept to Launch
Discovery & Architecture
Conducted deep-dive workshops to gather core requirements, finalized the event-driven microservices architecture, and selected the WebSocket protocol for real-time bidirectional communication.
Core Engine Development
Engineered the high-performance WebSocket infrastructure capable of handling millions of concurrent connections, implemented the custom message queue for guaranteed delivery, and built the centralized state management system.
Cross-Platform Clients
Developed the responsive React web dashboard and high-performance Flutter mobile applications, ensuring pixel-perfect design consistency and unified logic across Android, iOS, and Web platforms.
Security & Optimization
Seamlessly integrated End-to-End Encryption (E2EE) using the Signal Protocol, conducted rigorous penetration testing, tuned database queries for <5ms latency, and optimized payload sizes for mobile networks.
Launch & Monitoring
Executed a staged rollout strategy starting with beta users, set up comprehensive 24/7 proactive monitoring dashboards using Grafana/Prometheus, and established a dedicated support pipeline for immediate issue resolution.
Measurable Impact
Key Results
Direct business value delivered.
Impact Analysis
Message Latency
Before
800ms
After
45ms
Server Cost
Before
$450/mo
After
$120/mo
Conc. Users
Before
5,000
After
500,000
Technology Stack
Tools & Frameworks
Implementation
WebSocket Connection Hook
Core hook handling automatic reconnection with exponential backoff.
1const useWebSocket = (url: string) => {2 const [socket, setSocket] = useState<WebSocket | null>(null);3 const retryCount = useRef(0);45 const connect = useCallback(() => {6 const ws = new WebSocket(url);7 8 ws.onopen = () => {9 console.log('Connected');10 retryCount.current = 0;11 };1213 ws.onclose = () => {14 // Exponential backoff strategy15 const timeout = Math.min(1000 * 2 ** retryCount.current, 30000);16 setTimeout(connect, timeout);17 retryCount.current++;18 };1920 setSocket(ws);21 }, [url]);2223 useEffect(() => {24 connect();25 return () => socket?.close();26 }, [connect]);2728 return socket;29};Performance
Performance Audits
"FlowChat transformed how our team communicates. The speed and reliability are unmatched."