A Simple, Realtime, Event Driven Architecture with QR Codes

If QR codes were beginning to enter the mainstream before the pandemic, the pandemic itself has ensured the QR code is likely to be an indelible (if not marginally insecure) mainstay in contemporary culture for some time. The flow can feel somewhat magical. We scan this obscure puzzle of black and white squares, and somehow this converts into an access pass, evidence of having the correct…

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