A mcommerce developer specializes in creating and managing mobile commerce applications, which are platforms used for selling and buying products or services through mobile devices. They design user-friendly interfaces, ensure secure payment gateways, and optimize the app for speed and performance. They collaborate with various teams to integrate marketing strategies like push notifications or special promotions within the app. They also regularly update the app, fixing bugs, and adding new features based on user feedback. Furthermore, they ensure the app complies with digital standards and regulations, and use analytics to monitor the app's usage and performance.