We build custom
web applications and middleware

The Next App team builds applications that fit your business processes precisely. We keep things simple where possible and solve the complexity where it matters.

Technologies we use

FlutterSwiftKotlinAngularNestJSNode.jsGoogle CloudFirebaseREST APIGraphQL
Developer working at a modern desk with two monitors

Web applications

Web applications

Off-the-shelf software rarely fits exactly how your organisation works. You adapt your processes to the software, rather than the other way around. With a custom web application that is reversed: the software follows your way of working, not the other way around.

We build web applications for a wide range of challenges: client portals, scheduling systems, admin panels, internal tools and complex platforms. Always with a clear architecture, so future development is straightforward and you do not get trapped in technical debt.

Want to know what a web application costs and how the process works? On our web application development page we explain the full process, pricing and our approach.

Middleware

Middleware

Many organisations run multiple systems in parallel: an ERP, a CRM, an accounting system and their own tools. When those systems do not communicate with each other, manual steps, double data entry and errors arise.

We build middleware that connects your systems. Think integrations with AFAS, Exact, SAP or Salesforce, but also custom API integrations between systems that do not work together out of the box. Changes are automatically synchronised, so all systems are always up to date.

Abstract visualisation of connected software systems

Built for your process

Custom software that truly fits.

Not you adapting to the software, but the software adapting to you. From user interface to integration with existing systems.

  • Custom UI/UX based on your workflows
  • Integrations with AFAS, Exact, SAP and Salesforce
  • Scalable architecture on Google Cloud
  • CI/CD pipeline for fast further development
  • Maintenance and monitoring after delivery
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Examples from practice

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Veelgestelde vragen

Veelgestelde vragen over Web development frequently asked questions

What is the difference between a web application and middleware?

A web application is software that users interact with via the browser: a portal, dashboard or management platform. Middleware runs in the background and ensures that systems communicate with each other, without the user seeing it directly.

Many projects need both. A customer portal (web application) that displays orders from an ERP system needs middleware to fetch and synchronise that data. We build both and ensure they work together as a whole.

How does an initial conversation about a web project work?

We always start with an introductory meeting, at our office or online. We discuss your situation: what problem do you want to solve, which systems do you currently use and who are the users? We ask a lot of questions, because a good solution starts with properly understanding the problem.

After the meeting we assess whether custom development is the right choice. Sometimes we recommend an existing package if it fits better. If custom is the better path, we work out a proposal per phase, so you know exactly what to expect.

Do you work with dedicated teams or rotating developers?

Dedicated teams. Our team consists of three permanent employees and we do not outsource anything to freelancers or external parties. The developer who starts your project is the same one who delivers it. That prevents knowledge loss and ensures a consistent architecture.

You always have one dedicated point of contact who knows your project, your systems and your organisation. No handovers, no repeated explanations to new faces.

How do you ensure quality during development?

We work in two-week rounds. After each round you receive a working version to test. Problems are discovered early, not at final delivery. In addition, we review each other's code and use automated tests and a CI/CD pipeline that checks everything still works with every change.

For complex projects we set up an acceptance environment where your team can test before changes go to production.

Can you modernise or replace an existing system?

Yes. We start with a technical review of the current application: how is the code structured, which frameworks are used, where are the bottlenecks? Based on that we give honest advice: continue developing on the current foundation, partially refactor or start fresh.

With a phased replacement we build the new system step by step alongside the old one, so your organisation does not have to switch over all at once. Data migration and integrations with existing systems are included in the plan.

Do you also build the mobile app alongside a web project?

Yes. Many of our projects combine a web application for the administrator or back office with a mobile app for the end user on the go. Because we build both, the app shares the same backend and API as the web application. That saves development time and prevents two systems from getting out of sync.

We build mobile apps with Flutter for iOS and Android from a single codebase. You have one team and one point of contact for your entire platform.

All frequently asked questions about web application development →

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Ready to get started?

Let's grab a coffee. Tell us about your idea and we'll give you our honest take on what's possible.

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