The text discusses common mistakes made by engineers early in their careers and how they can be prevented using features offered by Buildkite, a continuous integration and deployment tool. Three key security features highlighted are Human Gates (Block Step), blocked_state attribute, and permission structure. Block Step allows for the blocking of dangerous actions until authorized by another team member, while blocked_state enables the build to show as "failed" or "running" when it is blocked. Permission Structure helps manage access control within Buildkite through user-level Members permissions and Teams. The author emphasizes the importance of security in software development and promises more guidance on structuring permissions within Buildkite for different organizations in future posts.