TYPO3 Core Developer

Permanent employee, Full-time · Düsseldorf

Your mission

These tasks make you happy

  • Bring ideas for the TYPO3 core to life
  • Development and integration of related features into the TYPO3 core
  • Review, adjust, and finetune patches
  • Supporting the TYPO3 core team in developing and finalizing solutions
  • Writing tests (unit- and functional tests), including sustainable documentation and quality assurance
  • Sharing knowledge with your team
Your profile

What we would like to see

  • Completed studies with a focus on computer science, a similar education, or relevant professional experience
  • Excellent knowledge of TYPO3 CMS development (focused backend, TYPO3 core, Extbase, Fluid, and TypoScript)
  • Experience with TYPO3 extension development (own extensions or contribution to extensions)
  • SOLID principles, test-driven development (PHP Unit), and clean code
  • Familiarity with development tools like IDE, xdebug, etc, especially GIT and Gerrit.
  • Good knowledge of HTML, CSS, JavaScript, and React would be a great
  • Having a certification as a TYPO3 CMS Certified Developer (TCCD) is a plus
  • Structured, goal-oriented, proactive, and self-dependent working style with a high-quality standard
  • Team orientation, innovative thinking, and acting complete your profile

Formal qualifications

  • Several years of professional experience working in a development role
  • Excellent knowledge of the TYPO3 core, PHP 8 and relational databases (e.g., MySQL, PostgreSQL) and Doctrine
  • You already contributed successfully to the TYPO3 core (handed in patches that got merged)
  • Good knowledge of Symfony Components
  • Good knowledge of PHPUnit
  • Confident use of standard development tools (IDE, Git, Gerrit, Composer)
Why us?

What we can offer you now

  • Collegial working environment, agile work culture and a first-name culture, flat hierarchies, and short decision-making processes
  • Collaboration with the TYPO3 core merger team
  • Free choice of your operating system
  • We take a long-term approach and seek like-minded people in the open-source environment
  • We strongly believe in open-source morality
  • Appreciation of new ideas and the opportunity for personal development
  • Space for personal and professional development 
  • Regular attendance at TYPO3 Camps, Developer Days, and external events is happily supported
  • Hybrid / On-site in a modern office in Düsseldorf as required and agreed
  • Flexible working hours
About us
TYPO3 GmbH creates, supports, and promotes services that enhance and improve the TYPO3 Project ecosystem. In other words, we make the TYPO3 CMS work better for you.

Our mission is to enable and strengthen the broader TYPO3 Community. This goal informs everything we do, including partner promotion, professional development, knowledge-sharing, and support services.
Your application!
We appreciate your interest in TYPO3 GmbH. Please fill in the following short form. Should you have any difficulties in uploading your files, please contact us by mail at jobs@typo3.com.
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