ALT Screenshot from Eric Harrer’s TYPO3 Public Profile Page showing the Certifications section. Visible certificates are “TYPO3 CMS Certified Integrator” and “TYPO3 CMS Certified Developer”. Each certificate is shown with its badge, validity dates, years certified, and a timeline indicating the overall period shown under the bar: 2022–2027 for Integrator and 2023–2028 for Developer.

ALT Screenshot of Eric Harrer's Gerrit dashboard on review.typo3.org showing four open TYPO3 CMS feature patches on the main branch, including language navigation, localized enum labels, indexed_search pagination, and a PSR-14 event for indexed_search result sets.

ALT Demonstration of the EXTENSION_TITLE_MISSING error message using the example extensions “content_blocks” and “schema”.

ALT I supported Wolfgang Wagner in his Workshop: Integration with New Techniques in TYPO3 v13

ALT An Introduction to DataHandler internals

ALT Speaking Rubber Duck: How to Be Your Own Developer Advocate

ALT I'm standing in the crowd outside the Geno Hotel for the group photo

ALT I'm standing on a bridge in the sun, waving goodbye from Karlsruhe after the TYPO3 Developer Days 2025, with the railway tracks and my folding bike behind me.

ALT A graphic with the badges of the TCCD certificates from 2023 and 2025 with the heading “Successfully renewed”