Thailand's digital government transformation is shifting focus from individual agency digitization to a "Connected Government" model—integrating disparate systems while maintaining security and data privacy. The piece outlines critical infrastructure requirements: Hybrid Cloud/Multi-Cloud architectures, data classification protocols, cybersecurity by design, vendor lock-in prevention via containerization, and robust Business Continuity Plans. Real examples (e-Tax integration with Digital ID, Pao Tang KYC) illustrate how backend interoperability directly improves citizen-facing services. The main challenge is not technology maturity but organizational confidence in secure data linking and willingness to invest in green energy and AI infrastructure resilience.