Hanab Telecom Infra (Formerly known as VolkerWessels Telecom) is a cornerstone of the Netherlands’ digital society, tasked with designing, building, managing, and maintaining telecommunications infrastructure across the Netherlands.
Their work ensures millions of people have reliable internet, can study online, use smart devices, and stay connected in today’s digital world.
At the heart of Hanab Telecom Infra’s operations is the Workflow Infratechniek, a powerful system that coordinates over 60,000 infrastructure projects —from the initial intake of project data to completion and feedback. This application is integral to every stage of all grid projects across the Netherlands, from onboarding and design to planning and delivery.
When a project begins, subcontractors hired by Hanab for a project provide details such as location, timelines, and personnel, which feed directly into Workflow’s system. The application then structures tasks, assigns roles, and checks every step is signed off before users can "advance” to the next phase of a specific project.
The Workflow application integrates with the Netherlands’ Digital Collaboration Platform (DSP), a standardized messaging system maintained by Mijn Aansluiting, to help keep things running smoothly. This platform establishes communication between firms like Hanab, subcontractors, and network operators, so important infrastructure projects like fiber optic installations and underground utility connections can be carried out as efficiently as possible.
However, maintaining and improving such a complex system requires third-party expertise from the digital sphere–which is where CLEVR comes in as a Platinum Partner for Mendix low code. Mendix is a platform that allows applications to be built quickly and flexibly without the need for extensive coding knowledge (hence the term “low code”). CLEVR has over 20 years of experience implementing Mendix solutions across industries, including the manufacturing, energy, utilities, and marine industries, and was tasked with working alongside Hanab to upgrade the Workflow application.
In this collaboration, CLEVR supported Hanab in a crucial upgrade to the DSP, which involved transitioning to more modern REST APIs and implementing advanced security protocols like OAuth 2.0 (which we’ll explain below). These upgrades allow Hanab to maintain the reliable and secure systems the Netherlands depends on.
The Challenge
The DSP 2.0 integration posed a set of challenges for Hanab Telecom Infra; at its core was the need to modernize the underlying technology of the Workflow application. Speaking to Hanab’s Citizen Developer, Roeland Drok, CLEVR was an easy choice when it came to creating a partnership; “We tried another supplier for a while and well, there was a difference in collaboration. CLEVR knows what to do; they understand the business, they understand us.”
Modernizing Communication: SOAP to REST APIs
It’s important to understand that APIs are like digital messengers that allow systems to talk to each other. Modernizing these messengers is like upgrading from a postal service to instant messaging, which is clearly more efficient and easier to manage when it comes to just sending written communications.
One of the critical changes involved transitioning from the outdated SOAP (Simple Object Access Protocol) to the more modern REST (Representational State Transfer) APIs. While SOAP relies on heavy, XML-based messaging, REST uses the lighter JSON format, making data exchanges faster and more efficient.
However, this shift was not just about adopting a new standard, it required a restructuring of how information flows between systems. This included remapping processes and ensuring that all parties in the network, from subcontractors to end users, could operate seamlessly under the new system.
Upgrading the Workflow Application: Mendix 8 to Mendix 10
Another challenge was upgrading the Workflow application, which had been in operation since 2017, to the latest version of the Mendix platform. This upgrade was far from straightforward, especially since it had to be executed without disrupting the management of thousands of ongoing projects. These projects represent a wide array of telecommunications and utility networks, all progressing through multiple phases such as intake, design, and execution.
“We upgraded from Mendix version 8 to version 10. I couldn’t do that myself—no one within Hanab could do that.”
Roeland Drok, Citizen Developer at Hanab Telecom Infra
Securing the System: OAuth 2.0
Security was another key point within the project. The existing system used certificate-based authentication, a method that had become outdated and less effective against modern cybersecurity threats. The transition to OAuth 2.0, a widely accepted security protocol, introduced a new level of protection for Hanab’s sensitive project information. However, implementing OAuth 2.0 was no small feat—it involved configuring secure access tokens, integrating identity verification systems, and making sure every user and system could authenticate seamlessly under the new framework.
Collaboration Across Teams
Along with the technical challenges, the DSP 2.0 integration required collaboration between Hanab’s internal teams, subcontractors, and CLEVR. This meant aligning priorities, coordinating schedules, and ensuring that all parties had the tools and knowledge needed to transition smoothly. Such a large-scale collaboration increased the complexity of the project, making it essential to have an experienced partner.
CLEVR’s Solution
“CLEVR has helped us since the beginning–they built it from scratch, and we don’t have to worry when CLEVR’s on the project. They know what to do.”
Roeland Drok, Citizen Developer at Hanab Telecom Infra
CLEVR helped the team at Hanab carry out the DSP 2.0 integration by using its vast Mendix expertise and management experience to keep the project on track and successful despite its complexity.
Transitioning to REST APIs
One of CLEVR’s key contributions was modernizing the data exchange system by transitioning from SOAP to REST APIs. This shift involved significant technical changes, including converting message formats from XML to JSON and redesigning how systems communicated. CLEVR’s team not only executed these changes but also made sure there was a seamless integration between the Workflow application and external systems like the Digital Collaboration Platform (DSP).
Implementing OAuth 2.0 for Enhanced Security
As you’d expect from a nationwide digital project, security was the priority, and CLEVR led the charge by implementing OAuth 2.0, a modern authentication protocol designed to secure sensitive data. This involved creating secure access tokens and integrating identity verification processes to replace the outdated certificate-based authentication. CLEVR’s ability to adapt to these new requirements ensured Hanab’s systems met the latest security standards without disrupting operations.
“OAuth 2.0 was completely new for me… CLEVR took care of it for us, connecting with the right people and making it work.”
Roeland Drok, Citizen Developer at Hanab Telecom Infra
Upgrading to Mendix 10
The upgrade of Hanab’s Workflow application from Mendix version 8 to version 10 was a critical component of the project. This task demanded extensive knowledge of Mendix and the Workflow application itself, as the system handles over 60,000 projects across multiple stages of development. CLEVR’s team meticulously planned the upgrade to make sure that all existing features and integrations functioned as intended while introducing the new capabilities of Mendix 10.
Flexibility and Last-Minute Adaptation
CLEVR’s flexibility and responsiveness were critical in overcoming challenges and quick changes in direction. When Hanab needed new integrations at the last minute to align with a broader ERP migration, CLEVR quickly adjusted its plans and delivered the required updates on time. "It was really last-minute, but CLEVR helped us with their planning and willingness to move forward. They made sure the new integrations were completed,” said Drok.
Seamless Collaboration
CLEVR’s approach centered on an ability to collaborate seamlessly with both Hanab and its subcontractors. This extended beyond technical expertise; CLEVR’s familiarity with Hanab’s systems and processes meant they could anticipate needs and deliver solutions with minimal oversight. This not only saved time but also reduced the risk of errors, a critical factor given the project’s complexity. According to Drok, “Working with CLEVR proved to be a lot smoother [than with other suppliers].”
Impact and Future Outlook: Stronger Together
The DSP 2.0 integration has already delivered significant improvements to Hanab’s operations. By upgrading to modern REST APIs and implementing advanced security protocols like OAuth 2.0, CLEVR has enabled Hanab to streamline communication with subcontractors and improve the overall efficiency of their projects. This enhanced collaboration ensures that Hanab can deliver critical infrastructure projects, such as fiber optic installations, faster and with greater precision.
For Hanab, this isn’t just about technology—it’s about maintaining their role as a cornerstone of the Netherlands’ digital infrastructure. The Workflow Infratechniek, now upgraded to Mendix version 10, is better equipped to handle the evolving needs of over 60,000 active projects, ensuring that Dutch citizens and businesses continue to enjoy reliable, high-speed connectivity.
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