David Gstrein from Kastelbell

David Gstrein

Keep it simple and effective.

Since 2010, I've been developing web solutions, optimizing UX and ensuring visibility through SEO and Ads on Google, Meta & Co.

Our customers are companies and organizations from all over Europe.

Contact: david@websystems.io

Logo Google Partner Sistrix Partner
Standortzeichen - Ein Unternehmen aus Südtirol

Services

Effective AI Integration

Instead of relying on basic copy-paste workflows with ChatGPT, a custom AI system is developed, tailored to the organization's specific needs. All company data remains fully under internal control, while the system continuously improves through daily usage. LLMs are integrated securely via APIs into existing processes, in compliance with data protection regulations.

Visibility and Reach

Be discoverable when people search on Google and when AI systems like ChatGPT are asked for recommendations. Content is clear, relevant, and machine-readable. The website is fast, well-structured, and optimized for both humans and search algorithms.

Conversion Optimization

Screen recordings and A/B tests help identify weak points: Where and why do my users drop off? From there, systematic improvements are made: faster load times, clear navigation, more effective copy. The result: measurable increases in leads and sales.

Projects

Self-manageable websites (CMS)

Change images, adjust prices, publish news, etc. The design remains consistent and the website remains fast.

Request details

Event Management Software

Solutions for event organizers. Proven at large events with 800+ simultaneous registrations.

  • Registration systems for sports and large events
  • Online ticketing
  • CRM system with newsletter, etc.
Open example

Digital assistant for every bicycle rental

24/7 reservations, generate rental contracts, collect reviews and much more.

Open verleihtool.com

Ecommerce Software

Efficient, accessible shop system for producers with specific offers.
A flexible alternative to subscription models like Shopify or Shopware.

Open example

Association Management Software

Manage members, collect contributions, store documents, send newsletters, organize trainings, etc.
Ideal for large associations with hundreds of members.

Request software