- Development themes from scratch; - Development of custom features to replace paid apps; - Participate in the development of Shopify apps, including planning and creating their architecture, checking and integrating various APIs, attending client calls, and liaising with third-party service providers to ensure the successful implementation of the app's architecture; - Mentor and provide guidance to Junior developers, sharing best practices and techniques for coding on the Shopify platform; - Provided the strategy for speed optimization; - Connecting different payments system via API, implementing sales triggers.