Freelance PHP developer
Danny van Kooten
Freelance PHP developer
I build and optimize PHP applications that handle millions of users. Available for freelance projects.
Track record
My PHP code runs on over 2 million websites right now. My WordPress plugins have been downloaded over 72 million times, including Mailchimp for WordPress and Koko Analytics.
I’ve been writing PHP professionally for over 15 years and have deep experience with WordPress, Symfony/Laravel and vanilla PHP. From small utilities to products used at massive scale.
What I can help with
- WordPress plugin & theme development: custom plugins, WooCommerce integrations, performance audits
- PHP application development: APIs, web apps, background workers, CLI tools
- Performance optimization: profiling slow code, reducing server load, optimizing database queries
- Legacy codebase modernization: upgrading from old PHP versions, improving architecture, adding tests
- Data migration: migrating to a new database scheme or different platform
- Code review & consulting: a fresh pair of experienced eyes on your codebase
Also comfortable with
While PHP is my bread and butter, I regularly work with JavaScript, Golang, Python, MySQL/MariaDB, PostgreSQL, and SQLite so I can handle the full picture, not just the backend.
How it works
Send a short description of your project to hi@dvk.co. I’ll reply within 2 business days to let you know if I can help and what the next steps would be.