Frequently asked questions

Alexander Seidler is an IT specialist for application development (Fachinformatiker für Anwendungsentwicklung) from Bietigheim-Bissingen. He develops applications full-time at Provimedia GmbH and is also the owner of twentyonepixels. His focus is on Laravel and PHP in the backend, Vue.js and React in the frontend, and on connecting language models to existing business processes.

He is an IT specialist for application development, qualified before the IHK Region Stuttgart in June 2026. The retraining ran from August 2024 to June 2026 at Aurelia GmbH in Stuttgart, including a seven-month practical phase at Provimedia GmbH. On top of that come six certificates from Anthropic and a commercial vocational qualification from 2016.

Since August 2026 he has worked full-time as an application developer at Provimedia GmbH in Bietigheim-Bissingen. Alongside this, he has run twentyonepixels as his own company since the same date. Before that he spent four years at EMANO DEVELOPMENT GmbH, working in project quality management, as a Scrum Master and as a Business Analyst.

Both. He is employed full-time at Provimedia GmbH and runs twentyonepixels alongside as his own company. Both roles began on the same day, 1 August 2026, following his IHK qualification. The dual role is communicated openly and presented on equal terms on this site.

In Bietigheim-Bissingen in Baden-Württemberg, about 25 minutes north of Stuttgart. Work is hybrid, meaning partly on site and partly remote. The immediate surrounding area includes Ludwigsburg, Heilbronn and Stuttgart itself, among others. The full business address is listed in the legal notice (Impressum) of this site.

In the backend with PHP and Laravel, in the frontend with Vue.js, React and Tailwind CSS. On top of that come REST interfaces, connections to third-party systems and the integration of language models. The current stack comprises Laravel 13, PHP 8.4, Vue 3, React 19, Tailwind 4 and Vite 8. A complete overview is available under Skills.

Yes, GDPR-compliant AI chatbots are part of the range of services offered by twentyonepixels. What matters is less the model than the architecture around it: where the data is stored, what is logged and for how long, and which content leaves the organisation at all. These questions are answered before the model is chosen, not after.

Hybrid. Collaboration mostly takes place remotely, and on-site meetings in the Stuttgart, Ludwigsburg and Heilbronn area are easily possible. For most projects, an occasional meeting at the start is enough; the rest can be organised asynchronously without difficulty. What that looks like in an individual case can be clarified in the first conversation.

An IT specialist for application development (Fachinformatiker für Anwendungsentwicklung) plans, programs and maintains software applications. They gather requirements, design the implementation, write the code, test it and document the result. The difference from the IT specialist for system integration lies in the focus: application development builds software, system integration runs infrastructure. The training is regulated uniformly nationwide in Germany by a training ordinance.

What matters is where personal data is processed and who can access it. This concerns the hosting location, the data processing agreement with the model provider, the logging of inputs, the deletion periods and whether inputs are used for training. All of this can be solved technically — it just has to be decided before building.

Ideally by email or via the contact form on this site. On working days, the reply usually comes within 24 hours. If you prefer to talk on the phone, you will find the number in the legal notice (Impressum). A short description of your request in the first message saves both sides a follow-up question.

For projects in a business context, twentyonepixels is the right route — that is where you will find services, terms and references. This site is the personal page: it answers questions about career path, qualifications and way of working. Enquiries about positions, professional exchange and questions about articles are exactly right here.