My favorite (and only) take home interview assignment. >> here is the problem, research as much as you want however you want, and take as long as you want... when you are done please format it as a 'xyz-ide' project on github and we'll get back to you in a day.
I hate this and find this just as academic and problematic as the whiteboard and quiz styles. Success in software development is about making the right trade offs to deliver while saving cost (ie your time). When you leave it so open an abstract, the dev looses the ability to discern this. "Production" standards are entirely based on context of the project and very specific requirements. Do you need structure logging, or rate limiting, or error handling, or notifications, or system status ect.. With do you already have systems in place to integrate these. Do you need a custom solution (like your own lambda engine) or do the off the shelve solutions (like aws lambda) meet the requirements.