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Stefan J.

PHP / Symfony Fullstack Developer

Bremerhaven, Germany

Experience

Feb 2024 - Dec 2025
1 year 11 months

PHP / Symfony Fullstack Developer

N.V.L. Group

  • PHP legacy and Symfony 5+ development of N.V.L. Group's in-house ERP from PHP 7.4
  • Integration of Oracle SQL, RabbitMQ, React and ExtJS
  • Use of Docker, GitLab as well as unit, integration, and functional tests
  • Frontend development with React and ExtJS in Docker containers via GitLab
Jul 2023 - Nov 2023
5 months

PHP / Symfony Fullstack Developer

Interquest Media S.L.

  • Bug fixing and feature development, including migration to PHP 8 and Symfony 5.4
  • Working on Twig templates
  • Use of OpenSwoole WebSocket server via Redis
  • Introduction and optimization of unit tests with PHPUnit 9+
  • Video editing using FFMPEG and image editing with Imagick
  • Restructuring the local development environment using Docker containers
  • Version control and ticket management with GitLab
Sep 2021 - Mar 2023
1 year 7 months

PHP / Symfony Backend Developer

publicplan GmbH

  • Extension and modernization of a headless React portal with Symfony 5+ API
  • Setup of a new microservice architecture following the SAGA/CQRS pattern with Symfony 5+ and PHP 8.1
  • Implementation of a custom authentication mechanism via JWT
  • Event messaging, DTOs, transfer models, and AMQP with RabbitMQ
  • Tests with code coverage > 95% (unit, integration, and functional tests)
  • Collaboration in 2-week sprints with Jira including documentation via OpenAPI/Swagger and Confluence
Jul 2021 - Dec 2021
6 months

WordPress Developer

STRATO AG

  • Modernization of the WordPress theme for up-to-date SEO/SEA measures, responsive design, and performance optimization
  • Migration to SCSS/SASS and modernization of the PHP code to version 7.4
  • Work following Kanban with up to 40% utilization per week
Feb 2021 - Jun 2021
5 months

WordPress & PHP Developer

PE Digital GmbH

  • Implementation of WordPress plugins and theme customizations for various brands
  • Provision of components via GitHub and Packagist
  • Docker containerization and CI/CD pipeline with Jenkins
Feb 2021 - Mar 2021
2 months

PHP Developer

oomoxx media e.k.

  • Continued the system relaunch of the booking and landing page system in Symfony 5+
  • Part-time contract work up to 10 hrs/week
  • Used MySQL, Doctrine, React, SCSS, and Webpack Encore
  • Unit tests and agile work process with Kanban
Dec 2020 - Dec 2020
1 month

PHP Developer

oomoxx media e.k.

  • Developed a new booking system and landing page generator based on specs in Symfony 5.1
  • Used MySQL, Doctrine, SCSS, and Webpack Encore
  • Unit tests and agile work process with Kanban
Jan 2020 - Sep 2020
9 months

PHP & WordPress Developer

PE Digital GmbH

  • Test-driven development of custom WordPress plugins and themes
  • Delivery via GitHub and Packagist
  • Docker-based dev server with CI/CD via Jenkins
  • Used CodeCeption for TDD and ReactJS in the Gutenberg context
Oct 2019 - Nov 2019
2 months

WordPress Developer

Strato AG

  • Modernized the blog system (.de & .nl) and built new themes
  • Developed custom shortcodes, widgets, and plugins
  • Set up a deployment process
  • Functional testing with CodeCeption
Aug 2019 - Sep 2019
2 months

WordPress Developer

Puzzlefactory / Druckerei Dünnbei

  • Made adjustments to the WooCommerce template of the Astra theme
Jul 2019 - Jul 2019
1 month

PHP Developer

Virtual-Reality Mallorca

  • Development of a WordPress plugin for booking VR gaming sessions
  • Integration of the PayPal API
Jun 2019 - Jun 2019
1 month

App Developer

Schwabenradio

  • Development of a radio streaming app for Android and iOS using Angular 7 and Ionic 4
  • Integration of the radio.co API and Capacitor/Cordova plugins
May 2019 - May 2019
1 month

WordPress Developer

Puzzlefactory / Druckerei Dünnbier

  • Customization of the Astra child themes for WooCommerce with custom shop, checkout, and cart pages, and dynamic price calculation
Apr 2019 - May 2019
2 months

App Developer

ParaTi Mallorca

  • Development of a coupon and offers app for Android and iOS using Angular 7 and Ionic 4
  • Use of Firebase (Auth, Storage, Analytics) and various Cordova plugins
Feb 2019 - Feb 2019
1 month

App Developer

Rock Radio Mallorca

  • Development of a streaming app for Android and iOS according to client specifications using Angular 7 and Ionic 4
Nov 2018 - Jan 2019
3 months

Angular Developer & PHP Developer

InterWorXs GmbH

  • Development of a login portal for sales reps with downline overview, product overview, and reorder option
  • Implementation of settings and data adjustments
  • Use of Angular 7, Symfony 3+/4, API Platform, and JWT Auth
Sep 2018 - Jan 2019
5 months

WordPress Plugin Developer

InterWorXs GmbH

  • Development of a WordPress plugin for lead generation and sales registration by postal code area
  • Use of Symfony 4 API Platform REST API and JWT Auth
  • Integration of CodeCeption integration tests
Feb 2018 - Sep 2018
8 months

Web Developer

InterWorXs GmbH

  • Implementation of two HTML/PHP prototypes for Olicci and sowifiads ad servers, including authentication and authorization
Dec 2017 - Jan 2018
2 months

PHP Developer

InterWorXs GmbH

  • Development of a text spinning tool with a role-based authentication and authorization system
Oct 2017 - Sep 2018
1 year

Head of Projects

InterWorXs GmbH

  • Project management and organization for the further development of the Olicci AdServer with an Indian development team
Jan 2017 - Sep 2017
9 months

PHP Developer

CrossWorXs S.L. / MindWorXs GmbH

  • Further development of an RSS project with Zend Framework 2
  • Integration with AdServer and SOLR (XML) API
Jun 2016 - Jan 2017
8 months
On-site

WordPress Developer

CrossWorXs S.L.

  • Building and developing various WordPress blogs
  • On-site SEO measures and maintenance of the blogs
Jun 2015 - Feb 2016
9 months

PHP Developer

Best Yacht Charter S.L.

  • Developing a custom ERP with connection to the Yacht Booker API
  • Generating PDF vouchers and cron daemons
Dec 2012 - Mar 2015
2 years 4 months

PHP, Frontend & WordPress Developer

LAMP solutions GmbH

  • Developing an ad server with Twitter Bootstrap 3
  • Developing various WordPress plugins and themes
Feb 2012 - May 2013
1 year 4 months

WordPress Developer

Inpsyde GmbH

  • Developing multiple WordPress themes using various WP hooks
Nov 2010 - Sep 2011
11 months

PHP Developer

Europalma Property Management S.L.

  • Developed a multilingual real estate portal with its own API for content distribution across multiple domains
May 2009 - Aug 2010
1 year 4 months

PHP Developer

Privacy Management Group Ltd.

  • Developed an eCommerce shop system including an affiliate system using Zend Framework 1.1
Jan 2009 - Dec 2017
9 years

WordPress Developer

Various client projects

  • Developed WordPress plugins and themes for various clients
Feb 2004 - Dec 2016
12 years 11 months

PHP & WordPress Developer

Luxcom Mallorca S.L.

  • Developed a PHP portal for cycling tour events
  • 2012 migrated to WordPress including theme and plugin development
Jan 2002 - Dec 2009
8 years

PHP Developer

Various client projects

  • Developed PHP websites and portals for various clients

Summary

  • Almost 20 years of experience in object-oriented PHP backend development using common naming conventions & standards with MySQL, NoSQL (Redis, MongoDB)
  • Over 14 years of experience in developing WordPress plugins & themes, including custom post types, custom taxonomies, implementing various hooks following WP conventions & Gutenberg/React blocks
  • Knowledge of the Symfony 4+ framework including API Platform, Doctrine, messaging and events
  • 24 years of experience in frontend development with HTML5, JavaScript, CSS
  • Experience with PHPUnit tests & CodeCeption tests (WordPress), test-driven development of WordPress plugins (TDD/BDD), and pairing.

Languages

German
Native
English
Intermediate
Spanish
Elementary
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