# Webservices Engineering GmbH – Ruby on Rails development, DevOps and infrastructure > We build and run web applications with Ruby on Rails: development, DevOps and infrastructure (PaaS). Our products: online-billing-service.com and Real Estate Management. - Source: https://en.webservices-engineering.de/ - Language: English (en). Deutsch (de): https://www.webservices-engineering.de/index.md - Site: Webservices Engineering GmbH, Peißenberg, Germany - Index for machines: https://en.webservices-engineering.de/llms.txt - Every page of this website is also available as Markdown: append `.md` to its URL (the home page is `/index.md`). Only the German text is legally binding; the English pages are a translation. --- ## We build and run web applications. Full-stack development with **Ruby on Rails** – from the first line of code to day-to-day operations: development, DevOps and infrastructure (PaaS). ### Our products Two applications we built and run ourselves – hosted in the EU, offered as software-as-a-service. #### [online-billing-service.com](https://online-billing-service.com) Write invoices, send them and keep track of payments – in the browser, from anywhere. - Recurring invoices and automatic payment reminders - Online payment by card, PayPal, Revolut and more - Invoices in ten languages, integrations for WooCommerce, PrestaShop and an API - Free to start, plans from €9.99 a month [Visit the website](https://online-billing-service.com) [See pricing](https://online-billing-service.com/prices) #### [Real Estate Management](https://real-estate-management.webservices-engineering.de/) One system for the portfolio, the contracts, the meters and the money that follows from them – from the property record to the issued invoice. - Properties, units, rental contracts and deadlines in one hierarchy - Meters, supplier invoices and configurable allocation keys - Connected invoicing and accounting, interface in English, German and Romanian - Shared cloud in the EU or a dedicated deployment (Private Cloud) [Visit the website](https://real-estate-management.webservices-engineering.de/) [See pricing](https://real-estate-management.webservices-engineering.de/pricing) ### What we do A small team that goes the whole way: build, run, keep improving. #### Development Web applications with Ruby on Rails, from idea to release. APIs (REST, GraphQL), integrations and the further development of existing systems. #### Maintenance & DevOps Operations, monitoring, updates and security – so your application runs reliably, even when nobody is watching. #### Infrastructure & PaaS Deployment in the cloud or on dedicated servers in the EU: databases, backups, scaling and delivery. ### Contact Webservices Engineering GmbH · Bergstraße 17, 82380 Peißenberg, Germany  ·  [+49 176 69014969](tel:+4917669014969)