Backend development often encounters several recurring pitfalls that can hinder performance and security. A primary mistake is inadequate input validation and sanitization, leading to vulnerabilities like SQL injection or cross-site scripting, alongside poorly managed security practices such as exposing sensitive data or API keys. Another significant error involves inefficient database query design and a lack of proper indexing, which drastically impacts application speed and scalability under load. Furthermore, developers frequently neglect robust error handling mechanisms, providing uninformative messages, or fail to implement comprehensive logging and monitoring, making debugging and incident response challenging. These oversights collectively undermine system reliability, maintainability, and user trust. More details: https://testphp.vulnweb.com/redir.php?r=https://www.epi-us.com