Christophe de Jonge
Verified Expert in Engineering
WordPress Developer
Noordwijk, Netherlands
Toptal member since March 9, 2022
Christophe is a developer with more than six years of experience in the web development field. He started working professionally as a freelance developer while studying physics and philosophy of science at the University of Leiden. In the meantime, he opened a small agency with a graphic designer and photographer as a partner. Most of the projects Christophe delivered were WordPress-based.
Portfolio
Experience
- jQuery - 7 years
- PHP - 7 years
- WordPress - 6 years
- Google Analytics - 6 years
- JavaScript - 5 years
- WooCommerce - 4 years
- Segment.io - 3 years
- Webflow CMS - 1 year
Availability
Preferred Environment
MacOS, Slack, Asana
The most amazing...
...project I've worked on was for an online travel agency. I implemented the geolocation search and autocomplete features using Google's APIs.
Work Experience
Freelance WordPress Developer
Kiind
- Fixed the extremely slow-loading website by implementing page caching, resulting in an improved user experience.
- Created an API connection with the subscription service that handles the shipping of their printed/physical magazine. The customers buy subscriptions through WooCommerce and are added to the CRM.
- Provided support to the content and marketing teams.
- Monitored the security of the website and kept everything up to date.
WordPress Developer
The Atlantic Council of the United States, Inc
- Developed a map and table centered data visualization web app embedded in a WordPress page.
- Determined the best database solution for the project.
- Worked with a designer and research team to find solutions for visualization.
Freelance Full-stack Web Developer
Candis
- Set up an investigation to assess the causes of holes in visitor data collected through Segment.io.
- Consolidated all the JavaScript files that tracked and formed handling into an ES6 webpack bundle and made it cross-compatible with WordPress, Unbounce, and Webflow.
- Oversaw the transition from HubSpot to Salesforce Pardot.
- Created a new website using Webflow CMS in collaboration with the marketing team.
- Contributed to continuous speed and search engine optimization.
- Managed and mentored a junior web developer to create a professionally setup website using Webflow CMS.
- Managed and tutored a junior web developer to take over the essential JavaScript project in charge of lead generation in Salesforce and tracking via Segment.io.
- Implemented UI changes, among other optimizations, with Google Optimize.
Senior Full-Stack WordPress Developer
Dermakliniek
- Moved and copied the existing website from a closed, fully managed (by a third-party agency) WordPress system to a self-managed WordPress installation, reducing monthly costs and allowing new business ideas to be implemented quickly.
- Connected a third-party review system to display customer reviews on the site and calculate the current overall rating. Displayed it throughout the site and added Google snippets to display the rating on the Google search results page.
- Overhauled the business' branding completely from a medical blue to a more high-end gold.
Freelance WordPress Developer
I am Reservations
- Created an API connection to a 2nd hotel booking engine, which connected even more hotels to the website, increasing the number of accommodations from several hundred to more than 1,000.
- Overhauled the search function to autocomplete geolocation-based search, immensely improving the user experience.
- Oversaw, developed, and launched a complete English website translation with the necessary additions to the custom back office.
Full-stack WordPress Developer
Mijn Vastgoed
- Designed the brand identity, logo, typography, and website for a revolutionary blockchain company's initial coin offering, potentially raising €1.5 million.
- Used WooCommerce to allow the sale of Ethereum coins and integrated a blockchain monitoring API to automate the completion of orders. Sold 20% of the coins through the website in 14 days with a worth of approximately €300,000.
- Created and maintained professional PDF documents on the company's Ethereum coin with Adobe InDesign.
- Oversaw the launch process with over 1,000 downloads of the ICO's PDF in the first week.
- Implemented complicated bulk discount of coins into WooCommerce cart.
Full-stack Developer
Build Up Advisory Group
- Developed and designed the main website around an existing logo.
- Created a secondary website: https://buildupinc.org, the actual nonprofit organization.
- Sourced dozens of copyright-free and relevant images to use on the websites.
Full-stack WordPress Developer
Faculty Association Histartes
- Developed a WordPress site from scratch with a custom theme and plugins.
- Created a plugin that allowed for easy management of full-screen background advertisement (think: WeTransfer).
- Made the content of the pages load with Asynchronous JavaScript (to keep consistency in display times of the background advertisement).
- Helped with getting typography and brand identity to perfection.
Experience
Website for an Online and Printed Parenting Magazine
https://www.kiind.nlWebsite for Accounting SaaS (Webflow)
https://candis.ioSales Funnel Forms and Tracking
https://candis.ioEducation
Bachelor's Degree in Physics
University of Leiden - Leiden, Netherlands
Certifications
JavaScript (Intermediate) Certificate
HackerRank
JavaScript (Basic) Certificate
HackerRank
Problem Solving (Basic) Certificate
HackerRank
Skills
Libraries/APIs
Segment.io, jQuery, WordPress API, WordPress REST API, JavaScript Charting, React, Stripe
Tools
Google Analytics, Mailchimp, Google Optimize, Slack, Asana, Adobe Illustrator, Git, GitLab, Advanced Custom Fields (ACF), Figma, Webpack 5, Babel, Gulp, Photoshop CS6, InDesign CC, Webpack, Zapier
Languages
JavaScript, PHP, HTML, CSS, JavaScript 6, HTML5, CSS3, SQL
Platforms
WordPress, WooCommerce, MacOS, Webflow CMS, HubSpot, Webflow, LAMP, Calendly, Ethereum, WordPress Theme Design, Amazon Web Services (AWS)
Paradigms
Object-oriented Programming (OOP), Search Engine Optimization (SEO), Mobile Web Design, Desktop Web Design, Responsive Layout, Responsive Web Design (RWD), Web UX Design, Data-informed Visual Design, Conversion Rate Optimization (CRO)
Frameworks
Divi, Svelte
Storage
MySQL, WP Engine
Industry Expertise
Web Design, Travel & Leisure
Other
Salesforce Pardot Form Handlers, WordPress Plugins, WordPress Themes, Site Speed Optimization, Page Speed Optimization, Yoast SEO, Elementor, SEO Tools, Third-party APIs, W3 Total Cache, HubSpot CRM, DirectAdmin, Content Management Systems (CMS), Child Themes, APIs, Webhooks, API Integration, Full-stack, Web Security, Security, Google SEO, Web Analytics, Custom Themes, Theme Customization, Performance Optimization, Booking Systems, ActiveCampaign, Brand Design, Typography, Web Development, Flatsome, Parallax Design, Unbounce, Professional Services, Payment APIs, Google Search Console, WordPress Design, Interactive Charts, Charts, Data Visualization, User Interface (UI), SvelteKit, User Experience (UX), Membership Sites, WCAG, Hospitality, Internet Booking Engines (IBE), Design
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