The frequency and sophistication of security breaches have continued to increase, highlighting a critical need for software engineers to enhance their knowledge and strategies in application security. The consequences of these threats are extensive, impacting not just the financial bottom line but also customers' trust and loyalty. Certain tools and technologies stand out for their effectiveness in bolstering application security, including automated vulnerability scanning tools and AI-driven Security Systems that leverage artificial intelligence to predict and respond to security threats in real time. A culture of continuous learning is essential for understanding and mitigating the risks associated with modern software development, while a robust secrets management tool like Doppler can help protect sensitive data and maintain the integrity of applications.