What are some common challenges a JavaScript engineer faces when working on large-scale applications?

One common challenge for JavaScript Engineers working on large-scale applications is maintaining code quality and consistency as the codebase grows. Managing dependencies, ensuring efficient performance, and coordinating with other team members to avoid merge conflicts are daily concerns. Engineers regularly use tools like linters, testing frameworks, and modular architectures (such as micro frontends) to address these issues. Collaboration with backend developers, product managers, and UX designers is also essential to ensure seamless integration and user experience.