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

Context

Development department — PFE 2026–2027

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

This project aims to transform the 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.

Keywords

MQTT, SaaS, multi-tenancy, cloud computing, Infrastructure as Code, Azure, Kubernetes, IIoT, .NET/C#.

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 through load and failover tests.

Deliverables

• Source code, Infrastructure-as-Code scripts and CI/CD pipelines.
• Self-service portal and administration dashboard.
• Project report, design report and test reports.

Expected results

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