This blog explores essential techniques for developers to enhance application performance and scalability. Learn about optimizing Node log levels for efficient debugging and error tracking. Dive into a microservices Java example using Spring Boot, showcasing how to build scalable, decoupled applications with resilient communication. Discover effective IIS web server performance monitoring practices to analyze critical metrics like CPU usage, memory consumption, and response times. From leveraging logging libraries to employing monitoring tools like Prometheus and IIS Logs, this guide equips developers with actionable strategies to optimize system performance, troubleshoot issues, and build robust applications tailored to modern development needs.