Driven by curiosity, focused on solving meaningful problems through technology.
I’m Tom de Visser, a web developer with over 10 years of experience specializing in WordPress — but my expertise extends well beyond it. From custom development to hosting, (cyber)security, performance optimization, and broader IT infrastructure, I handle the full technical stack.
As a Senior Developer at Stuurlui, I build tailored WordPress solutions for leading brands like NLZIET, MAX Magazine, and FrieslandCampina. One project I helped develop won Site of the Year in 2025.
Beyond client work, I contribute to open source — committing code to WordPress core and Gutenberg, publishing plugins, and helping organize WordCamp Netherlands.
Being self-taught means I never stop learning. I’ve earned over 19 certifications from institutions including Harvard, Microsoft, and CompTIA, always staying curious to keep my work sharp and relevant.
If you’re looking for a developer who combines deep expertise with continuous growth, let’s connect.
Always learning
A selection of certificates from the past few years — spanning everything from cybersecurity to WordPress development.
Harvard's CS50x: Introduction to Computer Science
Earned on July 7, 2025
Harvard's introduction to computer science — covering the fundamentals of programming, algorithms, and data structures.
Microsoft Certified: Azure AZ-900
Earned on November 4, 2025
Foundational certification covering core cloud concepts and Microsoft Azure services.
Cyber Security 101 (SEC1)
Earned on January 30, 2026
Entry-level security certification covering malware analysis, network traffic analysis, and web application security, with a 48-hour hands-on lab exam.
PEP™ - Certified Entry-Level Python Programmer
Earned on November 25, 2025
Entry-level Python certification covering programming fundamentals like data types, functions, loops, and exceptions, plus Python syntax and semantics.
WAI0.1x: Introduction to Web Accessibility
Earned on October 5, 2021
edX course covering the principles of web accessibility and how to build inclusive digital experiences.
Associate Data Engineer
Earned on November 4, 2025
Certification covering the fundamentals of data engineering, including pipelines, databases, and data transformation.