Custom web applications

Custom web development for small businesses and independent professionals

Online booking, client portals, catalogs with inventory management, marketplaces: I design and build the web application that fits the way you work, when a standard website is no longer enough.

Freelance web developer in Hainaut, Belgium · free quote, with no obligation.

The right fit

When should you choose a custom web application?

A business website presents what you do. A custom web application takes on part of the work: it shows your availability, records bookings, collects payments, and keeps your customers informed.

A business website or online store is enough if…

  • You mainly want to present your business and receive contact or quote requests.
  • You sell a product catalog with a standard cart and checkout.

In that case, a custom-coded business website (from €1,599 excl. VAT) or an online store will be faster to build and cost less:

Not sure which one you need? That’s exactly what the discovery call is for: we start from your business and your budget, not from a technology. Book a free call, and we’ll choose the best-suited solution together.

Features

Custom web applications: what I build

Features already live on real projects, for businesses in Belgium and the United States.

Online booking

Your customers pick their dates, see availability and pricing, then book (and pay online if you like) without waiting for a reply by email.

Example Vehicle rental (actionrac.com), parking with shuttle service (globalparkfly.com)

Customer portal

Each customer has an account to find their bookings and information, without having to call you with every question.

Example Vehicle rental (actionrac.com)

Marketplace

A platform where your users buy, sell, and trade with one another, with user accounts and escrow-protected payments.

Example Trading cards (tcgdeal.fr)

Catalog and inventory management

Present your offering in a clear online catalog and manage your inventory in the same place.

Example Vehicle catalog (rtoaction.com)

Appointments and Google Calendar

Online appointment booking: the booked time slot is added to Google Calendar with a Google Meet link. It’s the system this site uses.

Example This site’s booking page

Geolocation

Pinpoint where your customer is when every minute counts, like locating a broken-down vehicle for a roadside assistance service.

Example Towing service (mccoytow.com)

Want to see it for yourself? This site’s call booking page is one of these custom tools: pick a time slot, and it goes straight into my calendar.

Case studies

Custom platforms, live today

A marketplace, vehicle rental, parking reservations, a catalog: custom-built projects for real businesses, which you can explore online.

Home page of TCGDeal, a trading card marketplace

Custom platform

Trading card marketplace

A full-featured platform where collectors buy, sell, and trade their cards, with escrow-protected payments.

  • Marketplace
  • User accounts
  • Secure payments

Visit tcgdeal.fr (opens in a new tab)

See all my work

Process

How a custom project works

A simple, transparent process: at every step, you know what’s being done, what it costs, and when it will be ready.

  1. Step 1: Free discovery call

    You tell me about your business, what the tool needs to do, and how you work today. By video call (Google Meet), or by phone if you’d rather call me.

    Free, no obligation

  2. Step 2: Detailed quote

    You receive the list of included features, the price excl. VAT, and the timeline. Nothing starts without your approval.

    Price set before we start

  3. Step 3: Development and approval

    I develop the application, mobile-friendly and built for speed. You test it and approve it before launch.

    Timeline set in the quote, depending on the project

  4. Step 4: Launch and onboarding

    The application goes live. Onboarding, for you or your team, is planned and priced in the quote. Maintenance and updates are available afterward.

    Support available after delivery

My advice: start with the essentials

For a first custom tool, it’s better to launch the essential features, then add the rest as you use it. You benefit from your application sooner, and every update meets a real need rather than a guess.

Technologies

Proven, open technologies

I’m a full-stack PHP developer. On the server side, your applications run on PHP, with the Laravel framework, and a MySQL database; in the browser, on JavaScript, HTML5, and CSS3 (with Tailwind CSS). These open, widely used technologies power a large part of the web: your application doesn’t depend on a subscription to a closed platform, or on a single provider.

The code is tracked with Git, so every change is recorded and can be retrieved. The interface is mobile-friendly and designed to load fast, on desktops and smartphones alike.

Your content and your domain name belong to you. Ownership terms for the application and its code (including licenses for third-party components) are specified in the quote. If you ever switch providers, I’ll hand over the access you need.

Budget

How much does custom web development cost?

Every application is priced on quote, free of charge and before you commit to anything. Here’s what affects the price, plus a few benchmarks to help you gauge your budget.

What affects the price

  • The number of features and user types (visitors, customers, administrators).
  • The processes to automate: booking, ordering, online payment, confirmation emails.
  • Connections to your existing tools, such as your calendar or your payment provider.
  • The admin interface you need to manage your data day to day.
  • The content to add and the number of languages on the site.

In the quote form, you can give an estimated budget: it helps me suggest the best-suited solution, even if that means planning a first version, followed by updates.

Price benchmarks

Custom web application
Priced on quote
Custom-coded business website
from €1,599 excl. VAT
Online store
from €2,700 excl. VAT
Hourly maintenance
€50 excl. VAT / hour
Maintenance plan
€500 excl. VAT / year

Prices exclude VAT. My services are billed through Productions Associées asbl (VAT BE 0896.755.397).

Already have a site that mostly needs modernizing or upkeep? Take a look at website redesign and website maintenance.

Free quote

Tell me about your custom project

Describe in a few lines what your application needs to do: I’ll get back to you to talk it over, then send you a detailed quote.

Helpful to include

  • Your business and how you work today.
  • What the application needs to do, and for whom.
  • The tools you already use: calendar, spreadsheet, payments…
  • Your timeline and, if possible, an estimated budget.

Would you rather talk it through?

Your free quote

The project type “Custom website or web app” is already selected.

Fields marked with an asterisk are required.

So I can call you back if needed.

A few lines are enough: we’ll go over the details together when we talk.

Free, with no obligation.

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FAQ

Questions about custom development

Pricing, timelines, code ownership, support: answers to the questions I’m asked before a custom project.

Have another question? Check the frequently asked questions or call +32 456 96 02 13.

When do you need a custom web application instead of a business website?

To present your business and receive inquiries, a business website is enough: I custom-code it, starting at €1,599 excl. VAT, or build it with WordPress (the more affordable alternative), starting at €1,099 excl. VAT. A custom web application becomes necessary when your site has to follow rules specific to your business (availability, rates, customer accounts, inventory, payments), or when piling on plugins makes a site heavy and fragile. On the discovery call, we choose the right solution for your project and your budget together.

How much does a custom web application cost?

The price depends on the features: types of users, booking, online payments, a client portal, an admin interface, and connections to your tools. It’s set in a free, detailed quote, before you commit to anything. An application generally takes more work than a custom-coded business website, which starts at €1,599 excl. VAT.

How long does it take to develop a custom project?

The timeline is set in the quote, depending on the project: it’s driven by the number of features and by how soon your content is available. Starting with the essential features lets you launch a first version sooner.

Will I own the application and its code?

Your content and your domain name belong to you. Ownership terms for the application and its code (including licenses for third-party components) are specified in the quote. If you ever want to switch providers, I’ll hand over the access you need.

Can the application connect to my tools?

That’s often the whole point of going custom. My projects include online payments (parking reservations, a marketplace) and appointment booking that adds the event to Google Calendar with a Google Meet link: the one on this site. For any other tool, we check together what it allows during the discovery call, and the chosen solution is written into the quote.

Who takes care of the application after launch?

Onboarding, for you or your team, is planned and priced in the quote. After that, I can handle maintenance and updates: €50 excl. VAT per hour for one-off work, or a €500 excl. VAT annual plan for regular upkeep, with its scope specified in the quote.

Next step

Have a custom web application in mind?

Book a free, no-obligation discovery call: tell me what you need, and I’ll explain how to turn it into a web tool and what that involves.

+32 456 96 02 13 Monday to Friday, 9 a.m. to 6 p.m.

Call +32 456 96 02 13 Book a discovery call