Worked on the defi-wonderland/handbook repository to implement and document a Technical Design Security Review Process, embedding security considerations directly into the design phase. Focused on process improvement and security review, the work introduced a mandatory security review step for technical designs, enabling earlier identification of architectural risks and reducing potential rework. Using Markdown for clear and accessible documentation, the updated workflow guidance clarified responsibilities and improved adoption across teams. This initiative strengthened governance and fostered better collaboration between product, design, and security stakeholders, ensuring that security requirements are addressed proactively as part of the standard technical design process.