A Cadence Skill developer designs, develops, and implements skills or capabilities for Cadence, a voice-controlled virtual assistant. These skills may include answering queries, setting reminders, controlling smart home devices, or performing other tasks. The developer's duties involve understanding user requirements, creating algorithms, writing code, and testing the functionality of the skill. They also handle troubleshooting and enhancing the skill's performance. Additionally, they ensure seamless integration of the skill with the Cadence platform and other external systems. Their role is crucial in enhancing user experience and expanding the functionality of the Cadence virtual assistant.