Developing secure software poses challenges due to the constantly evolving nature of cyber threats. The complexity of modern software systems, combined with the need to balance functionality and security, makes it difficult to anticipate all potential vulnerabilities. Additionally, ensuring compliance with regulations can complicate the development process. Teams must adopt a proactive approach, implementing security measures at each stage of development, which can slow down timelines and increase costs. Furthermore, fostering a culture of security awareness among developers is essential but challenging, as it requires ongoing training and adaptation.