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Tim Haerkens

Custom software

Software that fits the way you work.

Off-the-shelf software forces you to change how you work. Custom software works the other way around: I build a web application around your process, with exactly the features you need and nothing more.

01/Services

What I build for you

  • Web applications

    From planning and admin to a complete management system. Accessible anywhere in the browser, on desktop and mobile.

  • Client portals

    A dedicated space where your clients log in, view their details, download documents or track orders.

  • Dashboards

    All your numbers in one place, updated live from your existing systems.

  • Integrations

    Your software talks to your accounting, CRM, webshop or bank. Enter data once and have it available everywhere.

02/Examples

Typical projects

  • From spreadsheet to app

    You track everything in Excel and you're hitting its limits. I build an app with the same logic, plus users, permissions and history.

  • Replacing legacy software

    An outdated system is rebuilt with modern technology, including migrating all your existing data.

  • A new product

    You have an idea for a SaaS or app. We start with a prototype, test it with real users and keep building from there.

03/Approach

Why custom software works

  • You pay for what you use

    No per-user licences and no features you never touch.

  • You own the code and data

    You get the full source code. No lock-in: any developer can pick it up.

  • Modern, proven technology

    I build with TypeScript, React, Next.js and PostgreSQL. Fast, secure and easy to maintain.

  • Grows with you

    Start small with the core and expand when your business needs it.

04/Projects

Real-world work

Storage management

Custom · Management system

Storage management

Management system for a storage company for caravans, campers and containers. Customers, payment terms and the location of every item on an interactive map, tailored to how the business works.

  • React
  • Supabase
  • PWA
Internal app, not public
MaxLogs

Web app · Newborn care

MaxLogs

An app for the first weeks with a newborn, where parents track feeds, nappies and temperature. Exactly what the maternity nurse asks for, with insight into feeding times and when the next feed is due. Both parents add entries to the same overview.

  • React
  • Vite
  • Supabase
  • Google login
Internal app, not public

05/Pricing

What does it cost?

Starting prices, excl. VAT. After a free intro call, you always get a fixed quote.

All prices
  • Prototype sprint

    Start here

    From€1,750

    A clickable prototype of your idea in about three working days. For testing, pitching or making decisions.

    • Clickable prototype
    • Works on mobile and desktop
    • A foundation for the full build
  • Web application / MVP

    From€5,700

    A first version of your application with the core features.

    • Accounts and permissions
    • Database and admin panel
    • Weekly demo
    • Continued development in sprints
  • Maintenance & ongoing development

    From€89per month

    Keep your website or application up to date, secure and online.

    • Updates and security
    • Monitoring and backups
    • Room for small changes

06/Frequently asked questions

Good to know

How long does it take to build a web application?

A first version with the core features is usually ready within a few weeks. After that, we keep building in short sprints, with a working version every week.

Can it connect to my existing systems?

Usually, yes. Many tools have an API, and if not, there are often other options like exports or webhooks. I'll look into this for you upfront.

Where does the application run?

On reliable cloud platforms like Vercel and Supabase, with servers in Europe. If you like, on accounts in your name, so everything belongs to you.

What if you're not available?

You get the full source code and documentation. Because I work with widely used technology, any experienced developer can take over.

Got an idea? Let's build it.

Book a free 30-minute intro call. No sales pitch, just honest advice on what's possible.