The calibration industry faces significant challenges due to its diverse and sophisticated equipment and complex traditional processes. Rapidly advancing technology highlights existing challenges while inspiring the adoption of innovative solutions to meet industry demands. This paper introduces a microservice-based cloud architecture that addresses these difficulties by managing the inherent heterogeneity in the industry. The presented architecture combines various equipment types, communication technologies, and diverse stakeholder expectations into a cohesive system that ensures efficiency and accuracy in calibration processes by utilizing different methods of uncertainty calculation and facilitating the generation of digital calibration certificates (DCCs). Our solution provides a holistic approach to managing data flow from the calibration equipment to the final generation of DCCs, employing cloud-based services in between to process data.