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PayPal,是一个总部位于美国加利福尼亚州圣何塞市的因特网第三方支付服务提供商,允许在使用电子邮件来标示身份的用户之间转移资金,避免了传统的邮寄支票或者汇款的方法。PayPal也和一些电子商务网站合作,成为它们的付款方式之一;但是用这种付钱方式转账时,PayPal收取数额比例相当高昂的手续费。

Scaling PayPal’s AI Capabilities with PayPal Cosmos.AI Platform

Everyday thousands of PayPal data scientists, analysts, and researchers use PayPal Cosmos.AI to deploy AI/ML models and solutions.

Scaling Kafka to Support PayPal’s Data Growth

Apache Kafka is an open-source distributed event streaming platform that is used for data streaming pipelines, integration, and ingestion at PayPal. It supports our most mission-critical applications and ingests trillions of messages per day into the platform, making it one of the most reliable platforms for handling the enormous volumes of data we process every day.

To handle the tremendous growth of PayPal’s streaming data since its introduction, Kafka needed to scale seamlessly while ensuring high availability, fault tolerance, and optimal performance. In this blog post, we will provide a high-level overview of Kafka and discuss the steps taken to achieve high performance at scale while managing operational overhead, and our key learnings and takeaways.

Intro To JavaScript Service Workers

If you have been working with web applications and used progressive web applications most likely you have heard the term Service Worker. If you haven’t, I’m going to teach you the basics of a Service Worker so you can leverage the power of them and use them in your web applications.

Unlocking the Power of JunoDB: PayPal’s Key-Value Store Goes Open-Source

JunoDB is a distributed key-value store that plays a critical role in powering PayPal’s diverse range of applications. Virtually every core back-end service at PayPal relies on JunoDB, from login to risk to final transaction processing. With JunoDB, applications can efficiently store and cache data for fast access and load reduction on relational databases and other services. However, JunoDB is not just another NoSQL solution. It was built specifically to address the unique needs of PayPal, delivering security, consistency, and high availability with low latency, all while scaling to handle hundreds of thousands of connections. While other NoSQL solutions may perform well in certain use-cases, JunoDB is unmatched when it comes to meeting PayPal’s extreme scale, security, and availability needs. From the ground up, JunoDB was designed to be cost-effective, ensuring that PayPal can maintain its high standards of quality and operational excellence while keeping costs manageable.

Building a Customizable Messaging Platform

Communication is an important part of human life. It helps resolve issues quickly, get answers to our questions and simply exchange ideas.

Caching Dynamic Content at the Edge

PayPal Upstream PayLater messages inform customers about financing opportunities to purchase products from t-shirts to treadmills. In addition to notifying customers of a safe and secure pay later option, these messages can increase merchants’ conversion and average order values. There is much upside for consumers and merchant customers in a small piece of HTML.

Delivering messages to customers may seem simple; however, at internet-scale, delivering messages to millions of consumers worldwide on thousands of merchant sites requires skilled engineering and sophisticated infrastructure. In addition to delivering the correct message to the proper merchant at the right time, PayPal’s merchant customers demand delivery of these messages at a ludicrous speed.

The next generation of Data Platforms is the Data Mesh

As enterprises become more agile, centralization appears more and more as a thing of the past world, a waterfall world. The same appears to be true with data platforms. Therefore, we are building a Data Mesh, this next generation of data platforms for PayPal Credit. This post details the evolution of data platforms, highlights their problems, and why we decided to build a Data Mesh. I will detail the four principles of the Data Mesh, how to get started, look at the architecture, and describe some of the challenges.

PayPal 当年如何找到自己的 PMF

David Sacks 将当年 PayPal 采用的战略称为“Going Sharp”。这里的 sharp,Sacks 将其定义为专注于几个杀手级功能,以满足最迫切的那个客户群,进而找到一个进入市场的楔子,之后放下其它的一切,全力出击。

Refactoring and Optimizing a High Traffic API at PayPal

We defined Latency as network latency plus application request processing time. With our focus on optimizing the application request processing time, 3 parameters were chosen to define performance:

  • Average latency
  • 95th percentile
  • 99th percentile

Words All the Way Down — Conversational Sentiment Analysis

Explore challenges, methodologies and datasets around conversational sentiments and learn how PayPal analyses customer sentiment.

The art of automating automation

Improving business efficiency through automation.

Designing for Accessibility: How Text Resizing Works in Different Web Browsers

Have you heard that 33% of mobile users have text size adjustment enabled on their phones? According to this excellent research by Q42 conducted among more than 1 million Dutch users, many mobile users require text resizing in order to properly read on their mobile devices. While this large survey was conducted specifically in the Netherlands, the data are similar to what is observed across other countries around the world. Therefore, ensuring quality text resizing is vital for approximately one third of your users.

How PayPal Uses Real-time Graph Database and Graph Analysis to Fight Fraud

Prevent organized and repeat fraudsters by using a home-grown graph platform.

Using Documentation-Driven Design to Guide API Decisions

As software design evolves, so do the thought processes behind the design decisions we make as engineers. Some of these development practices are widely known and talked about, such as Test-Driven Design, where changes to code are made in programmatic tests before they’re implemented in actual business logic.

These design practices are helpful for our future selves and for our teammates, because they help us keep our code well-maintained and easily extendable. How do these practices help external audiences, or audiences that aren’t as technical, understand our code? When designing a new API or making impactful changes to an existing API, a Documentation-Driven Design approach can be helpful in guiding the design decisions you make, too.

Building Data Quality into the Enterprise Data Lake

How a team at PayPal built a tool to define, manage, control, and deploy rulesets for the data quality framework.

Machine Learning Model CI/CD and Shadow Platform

Deploying large-scale fraud detection machine learning models at PayPal.

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