cwa-documentation VS system-design-primer

Germany hired SAP to build their app and it is open source.

I was developing some architecture training recently and had this very same question. It’s not easy to find realistic architectures.

The best I found was the German contact tracing app — Corona Warn App. It was done by a group of consultancies in collaboration with the German govt, and went from inception to launch in around fifty days — largely if not totally open source.

Here’s the repo that has all the architecture in: https://github.com/corona-warn-app/cwa-documentation

It’s got full git history so you can see it evolve over time, along with the implementations (also on Github).

There’s a pretty fascinating short talk by one of the people who led the project on youtube too — more about the process side though: https://youtu.be/5y1sHSkPWRg?t=1770

Hier ist das erklärt: https://github.com/corona-warn-app/cwa-documentation/blob/main/images/risk_calculation/risk_calculation_enf_v2_overview.pdf

Relevante Diskussion: https://github.com/corona-warn-app/cwa-documentation/issues/634

✅ donnemartin/system-design-primer: https://github.com/donnemartin/system-design-primer

View on GitHub

I've been giving interviews for past couple of months and this github repo has helped me so much for system design perspective and I can see myself excelling at interviews. - https://github.com/donnemartin/system-design-primer

You'll be on opiod's probably the first 1-2 days, so sleeping should be fine. Everything will be allright, don't worry too much. Just use the time now to prepare for the time after, make sure you go through post-surgery-essentials thread. Once you are out of the OR you won't have the energy to think about those details, so make sure you take that prep serious.

Tooling isn’t architecture. Figure out what you need to handle both personas and volume/throughput and then lay out the capabilities you’ll need. As you lay out points of ingress, egress, consumption you can start to lay out sequences(think in persona and sequence diagrams to express interactions between services). Lastly, evaluate tools that offer some of these capabilities and weigh the trade-offs (there are always trade-offs: https://github.com/donnemartin/system-design-primer).

[1] https://github.com/donnemartin/system-design-primer [2] https://www.teamblind.com/post/My-Approach-to-System-Design-V4SJARdx