webdesign
ES EN NL

Available for freelance projects

Custom web development, from design to the last pixel.

I'm Rene Jongsma, a front-end and back-end web developer based in Marbella. For 15 years I've been turning designs into fast, pixel-perfect websites: in WordPress, in React and Next.js on Vercel, or in static HTML and CSS. I work with businesses across the Costa del Sol, in English or Dutch, with no language barrier.

See my work Let's talk about your site
wp-content/plugins/rene-jongsma.php 
<?php
/**
 * Plugin Name:  Rene Jongsma
 * Description:  Web developer · front-end & back-end
 * Stack:        WordPress · Next.js · React · HTML/CSS
 * Version:      15.0   // years building for the web
 * Requires PHP: 8.0
 * Location:     Marbella, ES · hybrid · remote
 * Text Domain:  es, en, nl
 * Author URI:   https://rj-webdesign.es
 */

add_action( 'init', 'build_something_great' );
years building websites
15
years with WordPress
10+
websites managed
150+

About

A designer by training, a developer by trade.

Rene Jongsma

I've been building websites since 2011 and I live on the Costa del Sol. I started in Estepona with web maintenance, SEO and e-commerce, and have since worked for Marbella companies in tech, travel and real estate.

I studied Industrial Product Design (Human Technology) in Groningen, and it shows in how I work: I think about the person using the site first, and the code second.

Today I develop with AI every day (Claude Code). I use it to build my own tools that make creating websites, landing pages and templates faster and more consistent.

  • LocationMarbella · hybrid · remote
  • LanguagesDutch (native), English (fluent), Spanish (learning)
  • Clients inMarbella, Estepona, San Pedro, Benahavís, Mijas, Fuengirola, Benalmádena, Málaga and the rest of the Costa del Sol
  • Off the clockPadel, trail running, motorcycles and games

Services

What I can build for you

/web

Custom websites

Company sites and landing pages built with whatever fits best: WordPress with custom themes and plugins, Next.js and React on Vercel, or lean, fast static HTML and CSS.

/landing

Landing pages and automation

Landing pages generated from a form, forms wired into your systems, and scripts that save hours of manual work.

/app

Web applications

Tools and products built with React, Node.js, Express and Supabase, deployed on Vercel. From the idea to a product that works.

/care

Maintenance, SEO and performance

Looking after one site or many: new content, forms, updates, analytics and speed improvements.

Tools I work with

WordPress

  • Custom themes
  • Custom plugins
  • WooCommerce
  • ACF
  • Gutenberg
  • WP REST API
  • SEO

Front-end

  • HTML
  • CSS / Sass
  • JavaScript
  • jQuery
  • React
  • Next.js
  • Bootstrap
  • Tailwind CSS
  • AMP
  • Mustache

Back-end & data

  • PHP
  • Node.js
  • Express
  • MySQL
  • PostgreSQL
  • Supabase
  • MongoDB

AI & tooling

  • Claude Code
  • AI APIs
  • Git / GitHub
  • Vercel
  • AWS S3
  • Google Analytics
  • Photoshop
  • Illustrator

Work

Selected work

Websites and apps I've designed and built, from my own products to client work.

Art of War

Own product

A browser-based military strategy game with 30-day rounds, an active player base and AI bots that play on their own. I built all of it: game logic, back-end, front-end, guilds, premium features and retention emails.

  • Node.js
  • Express
  • React
  • SQL

SoundTrek

soundtrek.es

Turns the artists you follow into a personal tour feed: sorted by distance, plotted on a map and updated as soon as new dates go on sale.

  • Web app
  • Ticketmaster API
  • Maps

MesaShare

mesashare.es

A platform for restaurant chains that handles group orders in real time, complex promotions and splitting the bill.

  • SaaS
  • Real-time
  • Restaurants

Cycle Compass

Private tool

A private dashboard that tracks the Bitcoin cycle: market phase, buying conditions, valuation, halving and backtests. In English, Dutch and Spanish.

  • Dashboard
  • Data
  • ES · EN · NL

HowLongUntil5

Own product

A free countdown to the end of your workday, with your own hours, a progress bar and light and dark mode. Nothing to install, no sign-up.

  • Web app
  • SEO
  • Light / dark

BAI Beauty

baibeauty.co

A Shopify store for BAI Beauty's sleep mouth tape, with a bold custom design, product page and brand story. Launching soon.

  • Shopify
  • E-commerce

More work

Automated landing page and brochure builder

A web app that automatically generates a complete landing page and a brochure from an uploaded PDF or a URL. I designed and built it end to end.

  • Vercel
  • Supabase
  • AI

150+ websites managed

Responsible for more than 150 responsive and AMP websites: development, new pages, updates and ongoing maintenance.

  • WordPress
  • HTML
  • Sass
  • AMP

Native mobile apps

Built native mobile apps for iOS and Android, published and maintained on the App Store and Google Play.

  • iOS
  • Android
  • App Store
  • Google Play

GitHub activity

Almost all of my code lives in private repositories for clients and my own products. This is what sits behind it: my contributions over the past year.

— contributions in the last year

Loading activity…

View profile on GitHub ↗

Experience

Fifteen years on the Costa del Sol

Newest first, like a commit history.

  1. Sep 2021 – present · Real estate company, Marbella

    WordPress Developer

    Building custom WordPress themes and plugins, and an automated landing page generator. Running and extending several websites: content, forms, custom scripts and automations.

  2. Sep 2016 – Aug 2021 · Software company, Marbella

    Head of Front-End Development

    Responsible for 150+ websites. Built responsive and AMP websites, and native mobile apps for iOS and Android.

  3. Sep 2014 – Aug 2016 · AnyTech365, Marbella

    Front-End Developer

    Maintained the website and e-commerce products, as well as the telemarketing system (VoIP and PBX).

  4. Sep 2012 – Aug 2014 · My Destination, Marbella

    Front-End Developer

    Website maintenance and building pages from Photoshop designs. Developed the mobile version of the website.

  5. Sep 2011 – Aug 2012 · Andalucia Web Solutions, Estepona

    Assistant Web Developer

    Website maintenance, SEO, e-commerce, web design and online marketing for clients.

Education

  • BSc Industrial Product Design (Human Technology)Hanzehogeschool, Groningen · 2005 – 2009
  • Web Design CourseMarbella Design Academy · 2009 – 2010
  • Robotics Engineering (exchange semester)Universidad de Valencia · 2008

Contact

Have a project in mind?

Tell me what you need and I'll reply within one working day.