> For the complete documentation index, see [llms.txt](https://xwalk.gitbook.io/xwalk-white-book/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://xwalk.gitbook.io/xwalk-white-book/technical-architecture/5.2-system-architecture-overview.md).

# 5.2 System Architecture Overview

XWalk platform is built on a microservices architecture to ensure scalability, flexibility, and robustness of the system. Key components include:

* **Frontend:** Provides a user-friendly interface for travelers.
* **Backend:** Manages core application logic and service processing.
* **Blockchain Layer:** Handles cryptocurrency transactions and smart contract executions.
* **Database:** Stores user data, transaction records, and other necessary information.