CloudKitchens Software Developer interview questions

The first round was a take home open ended assignment which allowed me to demonstrate what I was capable of making (front end) to solve an industry related problem. This was followed by 4 technical interviews in different domains (Data structures/algorithm, General software engineering, Frontend design/architecture, React/Javascript)

Software Engineer E4 hiring process: 1) I was reached out by an internal CloudKitchens recruiter and we had a HR screen. 2) 1h technical phone screen: I initially struggled to figure out how to start the solution but after 20 minutes, I went into a direction with hashmaps/dictionaries and I was able to solve it just 5 minutes before the interview ended. I proceeded to ask questions to the engineer. I was able to make it to the final onsite. 3) final onsite with 3 interviews: - 3 hour project (recommendation: study API development, multithreading, concurrency, test coverage, how to make requests to a swagger API, etc) - 1h deep dive about the 3 hour project (the engineers will also ask you about extra features or follow ups, you'll likely also need to try implementing them) - 1h past project deep dive: you will need to select a project you have already worked on professionally or a very complex side project. Then, you'll need to present low-level (code stuff), middle-level and high-level overviews about the project to the engineering manager. Ideally, he will need to leave the interview with a considerable understanding of your project/system. Draw a comprehensive Excalidraw diagram for your project before going in. Apparently I was rejected on the final onsite because I didn't do too well in the 3 hour project. I was able to complete nearly all basic/normal requisites for the project, sadly, I only learned during the next interview, the 3 hour project deep dive, the API should fetch information from the swagger API. I also wasn't able to add test coverage.