Talklink

Low-Latency Real-Time Messaging Application

My Role: Full-Stack Developer

Timeline: Mar 2024 – Jun 2024

<100ms Delivery

Latency

WebSockets

Protocol

Real-time State

Sync

Architecture Overview

Talklink was built to explore low-latency socket networking and scalable real-time state synchronization. Utilizing Node.js and WebSockets with an optimized React interface, the application delivers sub-100ms message delivery, typing broadcasts, and instant delivery confirmations.

Key Features & Technical Implementations

Bidirectional WebSocket transport ensuring instant message synchronization.
Active typing indicators, user online/offline presence tracking, and delivery receipts.
Redis publish/subscribe channel for distributing chat events across instances.
Cursor-based paginated chat history loading for rapid scrolling without memory bloat.

Technologies & Tools

Back-End

Node.jsSocket.ioExpressRedisMySQL

Front-End

ReactCSS Modules / Tailwind

Infrastructure

VPSNginx WebSocket Reverse Proxy