The goal of this paper is to show the process of implementing and applying microservices architecture to the domain of web store applications. The required web shop functionalities are extracted through the requirements specification, initially defining a monolithic block handling all the business logic for the application. By separating and decomposing the responsibilities from the monolith into the services, a microservices architecture is defined for the web store. The microservices defined for the web store are product, review, order, payment, AI assistant, and inventory services. Once defined, the services implementation is carried out, through the usage of Java, Spring Boot, and Spring Cloud technologies. Each service is developed separately as an independent unit, with a separate database, if needed. Additionally, an API (Application Programming Interface) gateway is implemented to serve as a main entry and security point for the server-side, and discovery server to handle service registry. For the implementation of payment, the payment service integrates PayPal payment provider, and for the chatbot, the chat service integrates OpenAI ChatGPT paired with RAG (Retrieval-Augmented Generation). To round everything up, Angular framework is used for client-side application implementation, fulfilling a full-stack web application solution for e-commerce web store platform.