Live Demo GitHub

Real-time Typing Trainer

Overview

A real-time multiplayer typing trainer providing competitive practice sessions through PartyKit’s serverless real-time infrastructure. Built with React 19 and TypeScript, it delivers instant synchronization of typing progress across participants with comprehensive analytics and session management.

Key Features

  • Real-Time Multiplayer: PartyKit-powered WebSocket sessions supporting multiple concurrent users
  • Comprehensive Analytics: WPM, accuracy, error tracking, and character-level analysis
  • Session Management: Unique URLs for sharable multiplayer sessions with participant tracking
  • Solo Practice: Individual typing sessions with full analytics and progress tracking
  • Type-Safe Routing: TanStack Router for excellent developer experience and type safety

My Role & Responsibilities

  • Architected and built entire application as solo developer using React 19 and TypeScript
  • Implemented real-time multiplayer functionality with PartyKit serverless infrastructure
  • Designed WebSocket communication for instant typing progress synchronization
  • Built analytics engine calculating WPM, accuracy, and error patterns in real-time
  • Created session management system with unique shareable URLs for multiplayer
  • Configured Vitest testing framework for reliable code quality
  • Deployed frontend to Netlify with PartyKit backend at typing-trainer.oluwasetemi.partykit.dev

Technical Highlights

Leveraged React 19’s concurrent rendering capabilities for smooth real-time updates without performance degradation. PartyKit provides serverless real-time infrastructure with automatic scaling and connection management, eliminating the need for traditional WebSocket server setup. TanStack Router delivers type-safe routing with file-based routing patterns and excellent developer experience. The analytics engine processes typing events in real-time, calculating WPM with accuracy adjustments and tracking error patterns for detailed performance insights.

Impact & Results

  • Real-Time Performance: Instant synchronization with sub-100ms latency using PartyKit
  • Serverless Architecture: Scalable real-time infrastructure without server management
  • Modern React: Showcases React 19 features and concurrent rendering capabilities
  • Type Safety: Complete TypeScript coverage ensuring runtime reliability
  • Testing: Vitest integration for comprehensive unit testing