Developed a comprehensive Performance Optimization Guide for the ever-co/ever-teams repository, focusing on codifying best practices for React and Next.js applications. The guide provided a structured framework to improve code quality, efficiency, and maintainability, addressing common performance bottlenecks and reducing render and bundle times. Leveraging expertise in TypeScript, Markdown, and full stack development, the work aligned documentation with the repository’s structure to streamline onboarding and ongoing maintenance. This contribution enabled cross-team collaboration by establishing clear, repeatable standards for performance tuning, ultimately supporting more reliable performance improvements and reducing runtime overhead across the project without introducing new bug fixes during the period.