In the early stages of back-office feature development, Playbook's strategy centered on leveraging third-party integrations. This approach was practical initially, as the ROI for time and resources was uncertain. However, over time, managing these integrations and ensuring they addressed all use cases became rather challenging. This led to the Self-Service initiative, where Playbook shifted focus to replacing external tools with in-house solutions designed to address their specific needs. As part of this initiative, I was tasked with designing a mailing tool that would eventually serve both internal teams and creators.