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Custom software development

Is your business outgrowing Excel, scattered tools or off-the-shelf software? I build web applications that do exactly what your process needs: from client portal to internal dashboard or a complete SaaS platform.

From€5,000excl. VATIdeal for: businesses with their own way of working

Who it's for

  • Businesses with their own way of working that off-the-shelf software doesn't fit
  • Teams currently working with spreadsheets, email and scattered tools
  • Companies that want to offer a client portal or private environment
  • Start-ups building a SaaS product

What you get

  • Analysis of your process and needs

    Before any code is written, we map out how your process works today and where it can improve. That way I build what you actually need, no more and no less.

  • Web app built with React and Spring Boot

    An application that runs in the browser, no installation needed. React makes the interface fast and pleasant; Spring Boot (Java) provides a stable, scalable foundation.

  • Secure login and roles (Keycloak)

    Users sign in securely and only see what they're allowed to, for example staff, customers and admins each with their own permissions. Keycloak is a proven standard for this.

  • PostgreSQL database

    Your data lives in PostgreSQL, a reliable database used by large companies worldwide. Your data is yours and grows with your business.

Why Oosterom Studio

Understand first, then build

We map out your process together before any code is written. That way I build what you actually need, no more and no less.

Proven technology

React for a fast interface, Spring Boot (Java) for a stable foundation, PostgreSQL for your data and Keycloak for secure login and roles.

Built in short cycles

You see working versions along the way and can adjust course. No surprises at the end of the project.

How we work together

  1. Step 01IntroWe talk about your idea, goals and budget. No strings attached, in person or online.
  2. Step 02Proposal & priceYou get a clear plan with a fixed price and timeline. No surprises afterwards.
  3. Step 03BuildI build in short rounds and show progress along the way, so you can steer.
  4. Step 04Live & beyondLaunch, handover and, if you like, ongoing maintenance and improvements.

Examples from my work

How much does custom software cost?

Custom software starts at €5,000 excl. VAT. Since every project is different, we make a proposal with a fixed price and timeline after an analysis. Larger projects can be split into phases, so you can start small. The price mainly depends on:

  • the number of screens, features and user roles
  • integrations with existing systems
  • security and privacy requirements
  • whether it's built in one go or in phases

Frequently asked questions

What's the difference between custom and off-the-shelf software?

Off-the-shelf software is made for as many businesses as possible, so you adapt your way of working to the software. Custom software works the other way around: it adapts to your process.

Can we start small?

Yes, I often recommend it. We start with the most important features so you get value quickly, then build on based on what you learn.

What about security?

Users sign in securely via Keycloak and only see what they're allowed to. Data is stored in PostgreSQL and the application runs over a secure connection.

Who owns the software?

We agree on that up front in the contract. See also article 6 of the terms and conditions on intellectual property.

Curious what it would cost you?

Tell me briefly about your project. You'll get a proposal with a fixed price and timeline, no strings attached.

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