Requirements

Design a money-transfer backend system that can receive, send, and payout. It should cover issues like scaling, internationalization, Deduplication, single-point failure, strong consistency.

Design a webhook that notifies the merchant when the payment succeeds. We need to aggregate the metrics (e.g., success vs. failure) and display it on the dashboard.

Initiating a conversation with strangers is the biggest social fear. Actually, people often appreciate it when you make an effort to speak with them. Here we provide some ideas on how to start a small talk, what we should talk about and how to end it in a courteous way.

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Amazon's ambition to gain a share of all economic activities led it to enter the grocery service market. However, based on an analysis of Amazon's existing strategy and the cost disadvantages in fresh produce, it does not currently have a first and best supplier in grocery. Acquiring Whole Foods allowed Amazon to not only buy a retailer but also gain a customer for its existing business.

Requirements

Requirements

Steve Jobs coined the phrase “bozo management”. Bozos referred to the professional managers who know how to manage but don’t know how to DO anything. It turns out the best managers are great individual contributors who never ever want to be a manager but decide to be one.

What is DIF?