Medior Mendix Developer

Project overview

Assignment Description

As a Medior Mendix Developer, you will build low-code applications with the Mendix platform. You will develop larger Mendix applications within the Marechaussee. These can be operational systems, but also solutions that are more involved in business operations support. You will build smaller applications independently, with a senior helping you validate the architecture you designed. You will develop larger applications together with a senior, possibly in a team with other medior, junior, and senior developers. You will advise juniors on development patterns.

Working within Defense means you will work in a challenging IT landscape. Special attention during software development will be given to DevSecOps principles. Security by design and Privacy by Design will be applied from the very first idea. You will try to take this into account as much as possible during your work. Low-code means that you will also occasionally deal with high-code solutions elsewhere within the Defense application portfolio. Here and there, you may have encountered high-code development and have written a few lines of Java.

With a little help from a senior colleague, you will be able to integrate APIs into your solution. Additionally, you enjoy further developing your skills in Java, although extensive experience is not yet required. The low-code teams within Defense are set up as DevOps teams. Therefore, everything you create will also be managed by you at its core. During development, you will also pay attention to documentation and compliance, so that your application can be deployed immediately upon completion. Defense operates throughout the Netherlands, so travel may be part of your role.

The primary location is The Hague, but activities (such as meetings) may also take place at other locations. Please note: for this role, we are specifically looking for a medior profile. Senior roles will be excluded. In addition to technical requirements, team fit is also an important element.

Background of the Assignment

As a Medior Mendix developer, you will be part of the decentralized IT production KMar team. This small-scale multidisciplinary DevOps team (+/- 25 FTE) is responsible for the realization of small to medium-sized applications at the departmental/brigade level. They use various platforms for this, including: (public) Cloud, SharePoint, RPA, Low Code, and High code. The Royal Netherlands Marechaussee (KMar), part of the Ministry of Defense, is undergoing a transition to an information-driven organization, enabling it to act more effectively and efficiently.

An organization that, if necessary in collaboration with partners, temporarily focuses on specific operational tasks or areas, thereby enabling decisive action and thus being a reliable and flexible organization for state security, providing added value to its authority and the chain. Technological or legal changes lead to innovation in existing operational capabilities. An example of this is border control at airports.

The essence of the operation remains the same, but technological developments compel the KMar to constantly adapt its working methods, infrastructure, and information provision, and thus also the tools and training of personnel. The increase in mobility and communication capabilities make threats less localized and necessitate different management. The importance of collaboration therefore increases.

Additional Information

eCF Profile: Developer

Reference Area: B.01 Application Development

This assignment is based on the European e-Competence Framework (e-CF). This is a European standard for describing IT competencies and the associated level of responsibility. The eCF profile indicates which competencies and at what level (e-1 to e-5) are expected from the candidate. We expect candidates to clearly demonstrate in their CV that they possess these competencies. This can be done by describing for each relevant assignment or position:

CVs in which the requested eCF competencies are not demonstrably present cannot be fully assessed for suitability.

Generic description of competence area and levels

Interprets the application design to develop a suitable application in accordance with customer needs. Adapts existing solutions by, for example, porting an application to another operating system. Codes, debugs, tests, and documents, and communicates product development stages. Selects suitable technical options for development, such as reuse, improvement, or reconfiguration of existing components. Optimizes efficiency, costs, and quality. Validates results with user representatives, integrates, and commissions the overall solution.

Summary of task and mission

Designs and/or codes to meet solution specifications. Ensures the building and implementation of ICT applications. Contributes to a low-code design. Writes code to ensure optimal efficiency, functionality, and user experience.

• the role the candidate fulfilled
• the tasks and responsibilities involved
• the extent to which these align with the requested eCF competencies and the level

Responsibilities

Requirements/Wishes

Hybrid working: The frequency is an estimate, provided the work allows. Agreements regarding working from home are always made in consultation with the requesting party. Frequency of days working from home: 2

On-call services: No

• Develop engineer and integrate components
• Follow user experience guidelines
• Be aware of and familiar with known security vulnerabilities, by applying security by design
• Formulate documentation
• Provide advanced, component-level technical support
• Resolve issues before and after testing
• Candidate has at least 3 years of demonstrable work experience with the chosen eCF profile in a similar role.
• Candidate has a completed MX Certified Advanced certification.
• Candidate masters at least one software integration protocol such as REST and/or SOAP and can demonstrate this.
• Candidate has between 2 and 5 years of experience building Mendix applications for organizations.
• Candidate preferably has more than demonstrable work experience with the requested role within the eCF profile and assignment description.

Project details

• Start: 2026-12-31T23:00:00
• Location: Den Haag Zuid-Holland, NL
• Languages: Dutch