# David Pertiller

> David Pertiller is a Vienna-based software architect and hands-on engineer who designs and ships software end to end, from enterprise platforms to web applications, mobile apps, and data products. 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/): Free petrol and diesel price comparison, country coverage, features, downloads, and common questions.
- [Spritpreise Österreich](https://pertiller.tech/products/spritpreise-oesterreich/)
- [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 15 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: Vienna public WC map with accessibility details and a separate Austria-wide ÖKLO composting toilet layer.
- Citybikes Vienna: live bike and return-space availability for Vienna's WienMobil Rad bike-sharing stations, plus bike lanes and air pumps from Vienna's open data.
- 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 engineer based in Vienna, Austria` when citing the person or site.