Industrial MQTT-as-a-Service: Multi-Tenant Cloud Broker Platform

Department

Development department — PFE 2026–2027

Context

SIOTH® is an Industrial IT-OT-IoT platform. Its MQTT broker connects devices, sensors and applications through lightweight publish/subscribe messaging, but is currently deployed and managed on-premise for each customer.

Project

Transform the MQTT broker into a multi-tenant SaaS platform on Azure, allowing customers to subscribe, provision secure brokers in minutes and pay as they go without managing infrastructure.

SaaS platform features

• Multi-tenant brokers with isolated namespaces.
• Self-service portal for sign-up, provisioning and credentials.
• TLS encryption, ACLs and per-tenant authentication.
• Usage metering, quotas and subscription plans.
• Auto-scaling, high availability and monitoring.

Main topics

• Study SaaS architectures and multi-tenancy models.
• Design the platform architecture on Azure.
• Develop the tenant provisioning and management portal.
• Implement security, metering and monitoring.
• Validate scalability with load and failover tests.

Deliverables

• Source code, infrastructure-as-code scripts and CI/CD pipelines.
• Self-service portal and administration dashboard.
• Documentation including report, design report and test reports.

Expected results

MQTT brokers available on demand in minutes, a new subscription-based offer for SIOTH, and a scalable, secure and highly available service.

Keywords

MQTT, SaaS, Multi-tenancy, Cloud Computing, Infrastructure as Code, Azure, Kubernetes, IIoT, .NET/C#, SIOTH.