Jonathan Vollebregt

Leidschendam, South Holland, Netherlands

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Summary

🤩

Rockstar

Jonathan Vollebregt is a pragmatic PHP developer with 12 years of experience building and maintaining web applications and developer tools, including professional work from 2008–2022. He maintains a widely used PHP utility that attracts hundreds of thousands of downloads monthly and contributes to high-profile open-source projects like Adminer and Doctrine DBAL, improving both UI/UX and core database behavior. Comfortable across C, PHP, SQL and JavaScript, he combines backend attention to correctness (SQL abstraction, query criteria) with practical frontend fixes that improve usability. A long-time Linux user and open-source collaborator based in the Netherlands, he is known for thoughtful refactors, bug fixes, and small but impactful enhancements—like persisting UI filters and improving edit interactions—that boost developer productivity.

12 years of coding experience

Github Skills (19)

debugging10

javascript10

mysql10

doctrine10

databases10

abstraction10

abstraction-layer10

php10

dbal10

sql10

data-abstraction10

database10

css9

ui-design8

code-optimization8

Programming languages (15)

C#JavaC++CSSCRustVueGo

Github contributions (5)

vrana/adminer

Aug 2014 - Sep 2017

Database management in a single PHP file

Role in this project:

Back-end Developer & UI Designer

Contributions:6 commits, 5 PRs, 8 comments in 3 years 1 month

Contributions summary:Jonathan primarily contributed to the Adminer database management tool by addressing UI and usability issues. They fixed styling problems in the Haeckel theme and implemented improvements to the AdminerTablesFilter plugin. The user added functionality to persist the filter value and changed the output to use `<li>` elements. Additionally, they added Javascript functionality for editing by implementing move row functionality.

database-managementphpdatabasemysqlsqlite

doctrine/dbal

Jan 2017 - Dec 2017

Doctrine Database Abstraction Layer

Role in this project:

Backend Developer

Contributions:6 commits, 8 PRs, 39 comments in 10 months

Contributions summary:Jonathan primarily contributed to the Doctrine DBAL library, focusing on database abstraction and SQL-related functionalities. Their work included removing dead code in master/slave connection handling, fixing default isolation levels for MySQL, and implementing support for `IS NULL` in update/delete criteria, enhancing the library's functionality and correctness. Additionally, they performed code cleanup and refactoring, streamlining the code for improved maintainability.

databasemysqlpostgresqloracleibm-db2

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