Fast and scalable development of apps, with OutSystems

Based on a low-code, high-performance vision, we bring your application ideas to life with OutSystems. This makes the entire process fast and scalable.
  • The best developers in Belgium and the Netherlands under one roof
  • Tailored approach to enterprise grade solutions
  • Effortlessly manage your entire app portfolio with OutSystems
Let’s connect!
Today, Harmony is developing applications for:

We go fast, but we don't take shortcuts

Always focused on optimal performance

With OutSystems' cloud-native architecture, we are inherently prepared for high levels of traffic and numerous concurrent users. We optimise the source code and consistently ensure efficient resource allocation.

This way, we build the most reliable and high-performing applications for you, accommodating the fluctuating demands of your end-users.

Developed fast and salable with a low-code solution

By deliberately opting for a low-code solution, we accelerate development and empower businesses to respond more quickly to market changes.

This significantly reduces investment in cost and time without compromising quality.

Easy integrations with existing systems

We offer out-of-the-box capabilities to connect the OutSystems platform with your external databases and systems such as SAP, Salesforce, and Microsoft Dynamics.

Ans we can just as easily configure secure and scalable integrations with other systems using REST APIs.

Fully tailored to your needs

Yes, with OutSystems, we can develop custom solutions that perfectly align with your specific needs. The platform allows for extending applications with traditional code, providing flexibility and adaptability to your unique business processes.

Most importantly OutSystems supports full-stack development, enabling our developers to manage both front-end and back-end aspects, which is essential for creating comprehensive and integrated systems.

Long-term support

A state-of-the-art solution deserves state-of-the-art service. That's why we provide long-term support, ensuring you can always rely on our 24/7 service desk.

This instant communication enables us to respond promptly to incidents and inquiries.

Why we choose to develop with OutSystems?

Internal and field service applications
An app for your business, completely tailored to your company, processes and employees
With a custom application for internal use, we can build specific solutions tailored to your operations and workflows.

These can be easily integrated with back-office systems such as ERPs or CRMs. This way, we develop powerful apps without the cost and time required to replace legacy systems.
Do you have a challenge for us?
Customer applications
Intuitive apps for your customers
We translate your innovative ideas for mobile apps or web applications into intuitive applications, allowing you to test in practice what works best for your customers.
Contact us?
Fast and scalable
Low code, high performance
OutSystems enables us to develop up to 5 times faster and deliver value to our customers.
By combining configuration and setup with standard building blocks, we can implement simple to highly complex (business) requirements in a short amount of time.
How does that work?
“With Harmony, a respected company with a proven track record in this market, we have a strong partner to achieve success.”
Olga dos Santos Duarte
CEO at FortRevo

Take your first steps
completely risk free

From our experience, we understand that initiating the development of an application is a significant step.

Timelines, costs, quality, and security are crucial factors that are challenging to assess in a demo or sales conversation.

With our "5-step plan," you can set aside those concerns and test a brief initial journey with confidence as an introduction.
Try OutSystems for free


In this phase, we evaluate together whether implementing OutSystems brings added value to your organisation and what is essential to successfully achieve this.

Additionally, we investigate and discuss your current IT infrastructure, examining how OutSystems can contribute to the future growth and scalability of your applications.


Proof of Concept

This process begins with a thorough analysis of your requirements, followed by the development of a prototype showcasing the power and flexibility of OutSystems.

Harmony ensures that the Proof of Concept not only demonstrates the technical capabilities but also aligns with your strategic business objectives


OutSystems Architecture

We analyse how the architecture of OutSystems can be applied to help your applications grow and adapt to changing business needs with minimal impact.

Additionally, we assess your current application portfolio to ensure streamlined integration and management of the application lifecycle, paying attention to ownership and potential underutilised applications.



In this phase, the actual construction of the application is carried out, guided by the previously established architecture and application portfolio. We ensure a structured deployment of the application, with a focus on training, knowledge transfer, and support, to ensure a smooth transition and successful implementation.


Maintenance and Management

Following the application implementation, we provide continuous maintenance and proactive management to ensure optimal performance and reliability.

You have access to our 24/7 service desk, ready to provide support and promptly resolve any issues efficiently.

Building an application in a few weeks instead of a few months?
No problem!

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