What are we optimizing for? User Satisfaction

Stream and Batch processing frameworks can process high throughput at low latency. Why is Flink gaining popularity? And how to make an architectural choice among Storm, Storm-trident, Spark, and Flink?

Fraud Detection fights against account takeovers and Botnet attacks during login. Semi-supervised learning has better learning accuracy than unsupervised learning and less time and costs than supervised learning.

Requirements for designing Uber ride-hailing: providing services for the global transportation market; large-scale real-time scheduling; backend design; Uber ride-hailing design process: architecture; microservices; scheduling services; payment services; user profile services and trip record services, notification push services.

There is no good or bad management style; there is only effective and ineffective. The most important responsibility of a manager is to inspire subordinates to perform at their best. A person's task-related maturity depends on the specific work project, and its improvement takes time. When the maturity of the task and the individual's knowledge level and motivation reach a certain height, the manager can successfully delegate work to them.

Whenever you change something that users frequently interact with in your product, there will be unrest and opposition among users; this is known as

A manager’s most important responsibility is to elicit top performance from his subordinates. Unfortunately, one management style does not fit all. A fundamental variable to find the best management style is task-relevant maturity (TRM) of the subordinates.

Advertisers express their needs for ads to data-management platform and agencies. Then ads are delivered to ad networks and ad exchanges. Eventually, ads are presented to customers by publishers. The whole cycle is the so-called ads ecosystem.

Thirty years have passed, and online payments still lack a seamless experience. People believe payments should be as convenient as browsing, without the need to create accounts, passwords, or fill in credit card numbers, all while being bombarded with endless spam. Content creators are forced to rely on ads, benefiting only large companies. The internet urgently needs a foundational framework that incentivizes creativity and protects privacy.

People hate new changes in a product they are already familiar with. To avoid change aversion, you can let users understand in advance and afterward, allow them to switch, ask them to give feedback, and finally remember to follow-through.