Martijn Gastkemper
Senior Backend Engineer at meinestadt.de GmbH
Marburg, Hesse, Germany
Summary
🤩
Rockstar🎓
Top SchoolMartijn Gastkemper is a Senior Backend Engineer with 12 years of experience building and scaling secure web applications, specializing in PHP and Laravel. He has led high-stakes financial portals—handling tens of millions in annual bond sales and subsidy payments—and consistently focuses on clean, testable, and secure code. Comfortable across backend, DevOps and serverless patterns, he introduced Terraform and GitHub Actions at his teams and built Lambda-based image/video and redirect services in Node.js. An active open-source contributor, he has improved PHP tooling like Phinx and Deployer and fixed cross-browser frontend issues in a popular social feed plugin, showing a pragmatic full-stack mindset. Based in Marburg, Germany, he pairs practical engineering with mentorship, training colleagues on architecture and PHP best practices.
13 years of coding experience
18 years of employment as a software developer
BS Information Technology, BS Information Technology at HU University of Applied Sciences Utrecht (Hogeschool Utrecht)Primairy school, Primairy school at Basisschool De TandemAtheneum Mathematics Chemistry Physics, Atheneum Mathematics Chemistry Physics at Sint AntoniuscollegeInformation Technology, Information Technology at Delft University of Technology
Dutch, English, German
Stackoverflow
649reputation
71kreached
24answers
1question
Github Skills (26)
database-migrations10
tooling10
cron10
javascript10
jquery10
toolbox10
provisioning10
twitter-api10
php10
front-end-development10
database-migration10
toolz10
cicd9
databases9
sql9
Programming languages (10)
Github contributions (5)
pavelk2/social-feed
Sep 2016 - May 2018
JavaScript plugin that shows a user feed from the most popular social networks
Role in this project:
Front-end Developer
Front-end DeveloperContributions:17 commits, 18 PRs, 13 pushes in 1 year 7 months
Contributions summary:Martijn primarily contributed to the `jquery.socialfeed.js` plugin, focusing on enhancing its functionality and compatibility with Twitter. Their work included fixing date parsing issues in Internet Explorer, removing hardcoded locale settings, and adding support for longer tweets. They also added and modified features, specifically related to the "tweet_mode" option in Twitter, indicating a strong familiarity with Twitter's API and frontend development.
javascript
cakephp/phinx
Jul 2018 - Nov 2018
PHP Database Migrations for Everyone
Role in this project:Back-end Developer & Database Engineer
Back-end Developer & Database EngineerContributions:19 commits, 10 PRs, 20 comments in 4 months
Contributions summary:Martijn primarily focused on enhancing the functionality and stability of the database migration tool, Phinx. Their contributions included fixing typos in comments and improving the robustness of foreign key handling. They also implemented features like the `getColumn()` function for table objects and added support for small integer types across multiple database adapters. Furthermore, the user addressed several database-related bugs and tested the tool's behavior.
database-migrationdatabase-migrationsphpmigrationsphp-database-migrations
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