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The German government tasked SAP and Deutsche Telekom with the development of an open-source contact tracing app (named “Corona-Warn-App”) using the APIs from Google and Apple. Now they’ve published the code for the backend server. I took a quick look at the code and I’m quite a bit surprised about the quality and best practices used. They are using the Java-based Spring framework and use Postgres and minio to store data. Everything running in Docker. Even the Docker images are build using multi-stage Dockerfiles.

However, I have little hope that an app can help stop Corona, especially now that some restrictions have been lifted and people are behaving as they did before the crisis. I’m still unsure whether I will use this app or not, once it has been finished.


Jan-Lukas Else
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