An effective one-stop e-government portal requires a system with good integration and interoperability. However, most e-government portals lack in integration and interoperability. This work aims to find an effective approach for e-government integration and interoperability for one-stop e-government portal. This paper presents a hybrid egovernment architecture based on architectural principles, enterprise operational interoperability architecture and service component architecture (SCA). The experiment shows the proposed architecture is able to satisfy interoperation in terms of potentiality, compatibility, and performance tests for integration and interoperability e-government applications and services. The architecture is suitable for the development of one-stop egovernment portal.