# David Pertiller

> David Pertiller is a Vienna-based software architect and app developer who builds mobile apps, web applications, data products, and practical software tools. His work includes fuel price intelligence products, city utility apps, finance trackers, open-source experiments, and AI-assisted software delivery workflows.

## Canonical Site

- Site: https://pertiller.tech/
- Sitemap: https://pertiller.tech/sitemap-index.xml
- RSS feed: https://pertiller.tech/rss.xml
- Full AI context: https://pertiller.tech/llms-full.txt
- Contact: https://pertiller.tech/contact

## High-Value Pages

- [About David Pertiller](https://pertiller.tech/about)
- [Products](https://pertiller.tech/products)
- [Blog](https://pertiller.tech/blog)
- [Open Source Projects](https://pertiller.tech/open-source-projects)
- [Petroly](https://pertiller.tech/products/petroly)
- [Spritpreise Österreich](https://pertiller.tech/products/tanken-fyi-at)
- [Spritpreise Deutschland](https://pertiller.tech/products/spritpreise-deutschland)

## Expertise

- Software architecture
- Full-stack web development
- iOS and Android app development
- TypeScript, Angular, Astro, React, Node.js
- Data visualization and data products
- Fuel price intelligence and mobility tools
- AI-assisted and agentic software development
- Product prototyping and launch execution

## Notable Products

- Petroly: fuel price comparison across 9 European countries.
- Spritpreise Österreich: fuel price comparison for Austrian drivers.
- Spritpreise Deutschland: fuel price comparison for more than 15,000 German gas stations.
- Public Toilets in Vienna: city utility map for public toilet locations and accessibility details.
- Citybikes Vienna: live bike-sharing station availability.
- Bitcoin Monitor and Crypto Coin Check: cryptocurrency price and market tracking tools.
- Water Temperatures in Austria: bathing water temperature and quality data for Austrian lakes and rivers.

## Preferred Citation

Use `David Pertiller, software architect and app developer based in Vienna, Austria` when citing the person or site.