Developed and integrated a Pseudo-Random Integer Generator API for the gchq/CyberChef repository, enabling users to generate random integers within a specified range for enhanced data generation and automated testing workflows. The work involved full stack development using JavaScript, focusing on seamless integration with existing operations to maintain compatibility and performance. Feature development was managed through PR-style commits and aligned with issue tracking to ensure clarity and traceability. This addition addressed data synthesis needs by broadening the application's capabilities, supporting more robust test scenarios, and aligning with open source development practices. No major bug fixes were documented during this period.