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# Senior Mendix Developer

- **Company:** PSOhub
- **Location:** Netherlands (Remote available)
- **Experience:** Expert
- **Salary:** €5,000.0 - €6,500.0
- **Contract:** Permanent contract
- **Skills:** Artificial Intelligence, Cascading Style Sheets (CSS), DevOps, Mendix, Large Language Models, Deployment Automation, Build Tools
- **Published:** September 23, 2026
- **Apply:** https://www.indeed.com/viewjob?jk=fbf1ad06657a463b

## About the Role

* 4+ years of hands-on experience with Mendix, ideally working on commercial or customer-facing products.
 * Proven ability to work with and extend existing Mendix apps in a structured, thoughtful way.
 * Strong analytical thinking and problem-solving skills
 * A proactive, hands-on mentality with the ability to lead by example.
 * Comfortable working directly with customer support and end users to investigate and solve issues.
 * A pragmatic mindset and the ability to balance long-term quality with short-term goals.
 * Solid knowledge of REST integrations, performance, testing and Mendix security.
 * Curiosity about AI and LLMs. MCP experience helps, but you can learn it here.
 * You explain technical things to support colleagues and customers in plain language.
 * You pick things up without waiting to be asked.
 * Nice to have: DevOps, automated deployment, HTML/CSS.
 * Fluent English and/or Dutch.

## Description

What you will work on

About 70% of your week is building. In our Mendix 11 app you develop new features and keep improving performance, stability and security. Next to that you develop the MCP server, connect it to the big LLMs and build tools that let users take specific actions in PSOhub through AI.

The other 30% is second line support. When our Customer Success team can't resolve an issue you find the cause, fix it properly and keep support posted. You see how customers really use what you build, and that makes you better at building it.

Who you will work with

You will work directly with our CTO, exchanging ideas and leveraging each other's experience. On a weekly level you will also work with Martijn van der Hoeden, our CEO and product owner. He has been building project management and PSA software for over 30 years. You discuss your ideas with the team that decides.

Where you will work

Mostly from home. Once a week we get together at our office, an estate in Bussum.


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