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Web Development: Custom web applications and portals

We build web apps that are fast, accessible and scalable – from portals to internal tools and SaaS.

Web Development

Our web development stack

We use React, Next.js and TypeScript for responsive, accessible and SEO-friendly frontends. Backends in Node.js, .NET or Python. We plug into your ERP, CRM and auth. You get web apps that perform well and stay maintainable.

  • React, Next.js, TypeScript
  • Responsive and accessible UI
  • REST and GraphQL APIs
  • Integration with ERP, CRM, SSO
  • Performance and SEO

Web development that scales

We build web applications that are fast, accessible and easy to maintain. Our default stack is React and Next.js with TypeScript – so you get server-side rendering for SEO, a great developer experience and a codebase that scales. Backends are in Node.js, .NET or Python depending on your existing systems and preferences. We integrate with your ERP, CRM and identity provider so users sign in once and data flows automatically. Performance and accessibility are built in from the start, not added later.

Whether you need a customer portal, an internal tool or a public-facing web app – we deliver with clear architecture, tests and documentation. After go-live we offer maintenance, new features and handover to your team if you prefer. We build for the long term: clean code, automated tests and documented APIs so your web application stays maintainable and can grow with your business. Responsive design and accessibility are standard so all users can use your app on any device; SEO is built in where the project is public-facing.

Get in touch for a free consultation; we outline options, typical timelines and next steps without obligation.

Discuss your project

Frequently Asked Questions

Web Development

Costs, Tech & Timeline

How much does a custom web application cost?

Costs depend on scope: simple web portals from around €25,000 excl. VAT; complex business applications with integrations from €50,000–100,000+ excl. VAT. We give a transparent quote after a short briefing.

Which technologies do you use?

We use React, Next.js and TypeScript for frontends; Node.js, .NET or Python for backends. We choose based on your requirements, existing systems and long-term maintainability.

How long does web development take?

A small web portal often 6–8 weeks; medium-sized platforms 3–5 months; larger projects 6–12 months. We work in sprints so you see progress early and can steer.

Do you handle hosting and maintenance?

Yes. We offer hosting, monitoring, security updates and ongoing maintenance so your web application stays secure and can evolve with your business.

Björn Groenewold – Geschäftsführer Groenewold IT Solutions

Discuss your web project

We give a transparent quote after a short briefing.

Book a call

Your Next Step

Tell us briefly what you have in mind.

You'll receive a structured proposal with effort estimates and recommended next steps.

30 min strategy call – 100% free & non-binding