Code Reviews:

Conduct regular code reviews with your development team. Having multiple pairs of eyes on the code can help identify security issues and promote best practices.

Static Code Analysis:

Use static code analysis tools to scan your code for known vulnerabilities and coding errors. Tools like Fortify, SonarQube, and Checkmarx can help you identify security issues.

Dynamic Analysis:

Perform dynamic analysis or penetration testing to find security vulnerabilities that may not be apparent in the source code. Tools like Burp Suite or OWASP ZAP can help with this.

Unique Secrets and Keys:

Ensure that secrets, API keys, and other sensitive information are unique and not hard-coded in the code. Use environment variables or a secure secrets management system to store and retrieve these values.

Authentication and Authorization:

Implement strong authentication and authorization mechanisms. Ensure that user sessions are unique and secure, and that users can only access the resources they are authorized to.

Input Validation:

Always validate and sanitize user inputs. This prevents common security issues like SQL injection, Cross-Site Scripting (XSS), and Cross-Site Request Forgery (CSRF).

Secure Dependencies:

Keep all third-party libraries and dependencies up to date to patch known security vulnerabilities. Use tools like OWASP Dependency-Check to identify vulnerable libraries.

Encryption:

Use strong encryption for sensitive data, both in transit and at rest. Utilize unique encryption keys for different purposes and rotate them regularly.

Secure Coding Practices:

Educate your development team about secure coding practices, such as using prepared statements for database queries, avoiding insecure functions, and following OWASP's Top Ten list of security risks.

Logging and Monitoring:

Implement logging and monitoring to detect and respond to security incidents. Ensure that logs do not reveal sensitive information.

Continuous Security Testing:

Integrate security testing into your continuous integration and continuous deployment (CI/CD) pipeline. Automated security scans should be part of your build and release process.