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Senior Developer (.NET)

Nederland, Gelderland, NunspeetProduct Development


Everyone in your fields wants you, but what do you want? Do you want to work on complex technical issues in an international environment? Then Ultimo Software Solutions has what you're looking for!

Ultimo is an international software company with offices in Europe. With our own Asset Management software, we help customers in a wide range of industries. Ultimo keeps growing and innovating and uses the latest technologies and development methodologies.

If you want to know what we are currently working on, you can find a blog on GitHub that also contains some issues that keep us busy now. For example, you can read here how we use Bicep to roll out GitOps. We hope this will help us take major steps in infrastructure as code. Bicep

Your role

Your tasks consist of implementing customer requirements and improving our cloud architecture. We work approximately 20% of the time on solving bugs and the rest of the time is spent on expansions and improvements of the application. We make one application with which we support over 2100 customers. You will be working on our software in of our five scrum teams. The scrum teams consist of developers, testers, a business analyst and a product owner.

About our software stack

The application Ultimo consists of various services that have been developed in C#. Together, these make up the back-end. The front-end has been written in JavaScript, for which we use our own web framework. The current generation of the application runs on Azure Kubernetes. We use various cloud native technologies to offer a stable and scalable platform. For the mobile version of Ultimo we use Xamarin.

We work with .NET 5 (C#), Xamarin, Azure, Kubernetes, Azure SQL and JavaScript.


As a senior .NET developer, you:

  • monitor the architecture of the application;
  • have a clear vision of where we have to go;
  • constantly look for improvements;
  • work in a scrum team;
  • coach colleagues;
  • make choices independently to realise the best solution;
  • are open to personal development and growing with Ultimo.



This is what you bring:

  • A BSc/MSc degree in work and think level;
  • 10 years of experience with software development in .NET/C#;
  • Recent work experience with cloud services and/or Kubernetes;
  • A team player attitude;
  • A solution-oriented and decisive mindset;
  • Good command of English (and Dutch is preferred).

For this position, we offer:

  • Of course a good salary that matches your level knowledge of and experience;
  • Growth opportunities;
  • Home office setup and compensation (now and also after Covid);
  • Flexible, informal and international development team;
  • Choice between: 32- or 40-hour working week.

About Ultimo

Ultimo is the# 1 EAM cloud platform for managing assets; scalable and easy to use on any device. Together with 180 smart and enthusiastic colleagues in the Netherlands, Germany, Belgium and the UK, we support 2000 large and mid-sized clients in Northwest Europe. We are ambitious and driven, love a challenge and are eager to go the extra mile. We are heavily focused on growth, expanding our international Channel organisation, the collaboration with renowned technology partners and providing high-valued services, training and support.