Andreas Kießling
Freelance Webdeveloper at Freiberuflich
Leipzig, Saxony, Germany
Summary
👤
Senior🎓
Top SchoolAndreas Kießling is a seasoned freelance web developer based in Leipzig with 13 years of experience specializing in TYPO3 and DevOps. He combines a technical foundation (B.Eng. in Medientechnik) with business acumen (M.A. in General Management) gained while running his own company and leading teams. His background includes long-term senior roles at agencies and direct contributions to the TYPO3 core, where he focused on backend bug fixes, caching and request handling, and database schema adjustments. Comfortable across the full stack, he brings pragmatic engineering to enterprise CMS projects and deployment pipelines. Clients benefit from his mix of deep framework knowledge and entrepreneurial perspective, which helps translate complex requirements into robust, maintainable systems. Notably, his open-source fixes reflect a strong understanding of framework internals and cross-browser compatibility nuances.
13 years of coding experience
12 years of employment as a software developer
Master of Arts - MA, General Management, Master of Arts - MA, General Management at HTWK Leipzig - Hochschule für Technik, Wirtschaft und Kultur LeipzigAbitur, Abitur at Gymnasium WunsiedelBachelor of Engineering - BE, Medientechnik, Bachelor of Engineering - BE, Medientechnik at Hochschule Mittweida (FH)
Github Skills (13)
content-management-system10
cms10
php10
extbase10
content-management10
typo310
databases9
sql-database9
database9
sql-db9
sql9
database-management9
javascript8
Programming languages (9)
Github contributions (5)
TYPO3/typo3
Nov 2012 - Oct 2022
The TYPO3 Core - Enterprise Content Management System. Synchronized mirror of https://review.typo3.org/q/project:Packages/TYPO3.CMS
Role in this project:
Back-end Developer
Back-end DeveloperContributions:15 commits in 10 years
Contributions summary:Andreas primarily contributed to bug fixes and enhancements related to the TYPO3 CMS backend. Their work involved addressing issues with request building and caching mechanisms, specifically focusing on resolving compatibility problems and ensuring correct behavior in different browser environments. The contributions also included modifying database schemas and fixing content object handling within the frontend rendering. The user's commits reflect a good understanding of the framework's internal workings and the interaction between different components.
cmsmanagement-systemphpsynchronizedtypo3-cms
extrameile/t3ext-auth_basic
Aug 2020 - Jan 2022
Protect TYPO3 pages with auth basic
Contributions:2 releases, 2 PRs, 12 pushes in 1 year 5 months
protecttypo3typo3-extensionauthbasic-auth
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