doc: Add links to our career page (#11)

Author: hf-kklein

README.md

@@ -92,3 +92,11 @@ For development of this library, follow the instructions in our [Python Template
 
 ## Contribute
 You are very welcome to contribute to this template repository by opening a pull request against the main branch.
+
+## Related Tools and Context
+This repository is part of the [Hochfrequenz Libraries and Tools for a truly digitized market communication](https://github.com/Hochfrequenz/digital_market_communication/).
+
+## Hochfrequenz
+[Hochfrequenz Unternehmensberatung GmbH](https://www.hochfrequenz.de) is a Grünwald (near Munich) based consulting company with offices in Berlin and Bremen and attractive remote options.
+We're not only a main contributor for open source software for German utilities but, according to [Kununu ratings](https://www.kununu.com/de/hochfrequenz-unternehmensberatung1), also among the most attractive employers within the German energy market. Applications of talented developers are welcome at any time!
+Please consider visiting our [career page](https://www.hochfrequenz.de/index.php/karriere/aktuelle-stellenausschreibungen/full-stack-entwickler) (German only).