What are some common challenges faced by REST API software engineers when ensuring API security and reliability?

REST API Software Engineers often encounter challenges in balancing robust security with seamless performance. Securing endpoints against threats such as unauthorized access, injection attacks, and data breaches requires implementing proper authentication, authorization, and input validation. Additionally, engineers must design APIs to handle high traffic volumes and provide reliable error handling, all while maintaining clear documentation for other developers. Collaboration with DevOps and QA teams is essential to continuously monitor, test, and update APIs to address emerging vulnerabilities and ensure consistent uptime.