How Uber Eats solved the global delivery problem

When Uber first expanded Uber Eats worldwide, there was a problem. From Delhi to Kyoto to Ottawa, food is delivered on different vehicles, for different restaurants, and in different environments. How can one app encompass all these conditions?

Through order shadowing, fireside chats, and ground field research, UX designers discovered unique challenges. With scrappy research methods, they solved problems specific to both the driver and the user. How did they do it? Also, they ate food for research. Where do I sign up?

Sources
https://medium.com/uber-design/how-we-design-on-the-ubereats-team-ff7c41fffb76
https://www.uber.com/blog/uber-eats-recommending-marketplace/
https://www.dbpia.co.kr/pdf/pdfView.do?nodeId=NODE07122197&googleIPSandBox=false&mark=0&minRead=15&ipRange=false&b2cLoginYN=false&icstClss=080000&isPDFSizeAllowed=true&accessgl=Y&language=ko_KR&hasTopBanner=true
https://www.youtube.com/watch?v=vU2zX8ICyDg&t=98s

You're busy, I gotchu
0:00 - A big problem
0:56 - Meanwhile, at the Uber office
1:40 - The quest begins: 3 strategies
2:49 - 2 key findings & the solution
4:20 - Uber Eats' greedy algorithm
5:13 - An important lesson