This article provides a list of top 10 best practices for securing a web application from a backend developer's perspective. The best practices include using HTTPS, implementing input validation, using parameterized queries, password hashing, two-factor authentication, limiting access, using security headers, securing APIs, regularly updating dependencies, and using logging and monitoring. These practices help prevent common web application attacks, such as SQL injection and cross-site scripting, and maintain user trust by ensuring the security of sensitive information. It is essential to continually update and monitor web application security to prevent potential threats.