Node.js and TypeScript for Production Systems

Module 1: Production architecture in Node.js and TypeScript

• Clean code principles for long lived services and teams
• Layered design, ports and adapters, and modular boundaries
• Dependency injection patterns and composition roots in TypeScript
• Practical design patterns for Node.js services factory, strategy, repository, and mediator

Module 2: Advanced TypeScript for application design

• Type narrowing with guards, discriminated unions, and exhaustive checks
• Decorators in TypeScript and where they help in frameworks and internal tooling
• Modules, exports, path strategies, and avoiding circular dependencies
• Strong typing across DTOs, domain models, and service contracts

Module 3: Advanced async programming

• Event loop behavior and how async work actually gets scheduled
• Streams for large data flows, backpressure, and pipeline design
• Worker threads for CPU bound tasks and safe offloading patterns
• Coordinating promises, cancellation, retries, and timeout boundaries

Module 4: Real time communication and concurrency

• WebSockets architecture connection lifecycle, fan out, and state management
• Handling concurrency safely in request driven and event driven services
• Threads vs processes vs worker threads and when each fits
• Reliability patterns heartbeats, reconnection, and graceful degradation