Design and Implementation of a Web Application for the Integration of the Shopify E-commerce Platform with the mPOHODA Accounting System

Diploma thesis focuses on the design, implementation and verification of a web embedded application for integrating the Shopify e-commerce platform with the mPOHODA accounting system. The thesis addresses a practical problem of small and medium-sized online stores, where the sales layer is operated on a global platform, while accounting and document processing are handled in a local economic system. Existing solutions available on the market often cover this scenario only partially, with limited functional scope or without sufficient alignment with local accounting practice. The aim of the thesis was to design a solution that enables secure, reliable and operationally sustainable data transfer between Shopify and mPOHODA, reduces manual intervention and decreases errors in the processing of orders and accounting documents. The thesis applies theoretical literature review, market analysis, stakeholder analysis, Lean Canvas and Value Proposition Canvas, the RICE framework for functionality prioritization, and the MMSP methodology as the development framework. Based on these methods, system requirements were defined, the solution architecture was designed, and the Alena application was implemented as an embedded application in the Shopify environment. The result of the thesis is a functional integration solution that was verified through testing and real-world operation and demonstrated practical usability for data transfer between Shopify and mPOHODA.