The applications of kazi are deployed on Azure PaaS (Platform as a Service) solutions in Azure.
Microsoft Azure runs in datacenters managed and operated by Microsoft. These geographically dispersed datacenters comply with key industry standards, such as ISO/IEC 27001:2013 and NIST SP 800-53, for security and reliability. The datacenters are managed, monitored, and administered by Microsoft operations staff. The operations staff has years of experience in delivering the world's largest online services with 24 x 7 continuity.
More info on infrastructure related security measures regarding network, OS, physical hosts and physical datacenter, can be found on the Microsoft website via the following link.