If this is not a spin on the linked article, that would definitely be terrifying. A bit as if stack overflow and reddit had a baby.
If it is a spin, the identity system used is a popular open source system which you can find at https://github.com/ory/kratos. The react code is a reference implementation of the same people who wrote that thing, and the article is intended to help people get started with the open source stack. So if you were indeed applying for a job interview, and the task would be to write such an app - you would know where to look. Plus, this would probably reduce the amount of terrible login solutions we have today in the WWW ;)
If it is a spin, the identity system used is a popular open source system which you can find at https://github.com/ory/kratos. The react code is a reference implementation of the same people who wrote that thing, and the article is intended to help people get started with the open source stack. So if you were indeed applying for a job interview, and the task would be to write such an app - you would know where to look. Plus, this would probably reduce the amount of terrible login solutions we have today in the WWW ;)