Published in Level Up Coding·PinnedMember-onlyIntroduction to System Design InterviewsThis article will overview practices and areas to focus on when navigating a systems design interview at a high level. I expect this information to be most helpful to engineers in the 1–3 years of experience range or those who have never done a systems design interview. Additionally, this article…Interviewing8 min read
Published in Level Up Coding·Sep 21, 2021Member-onlyHow to polyfill Buffer with Webpack 5Buffer is a core Node.js API useful when working with binary data. This article will briefly overview how to polyfill the Buffer API for browser environments with Webpack 5. Why do we need to polyfill Buffer? When working in the context of a browser environment, Node.js APIs, such as Buffer, aren’t available. There are sometimes comparable APIs…Java Script3 min read
Published in Level Up Coding·Mar 6, 2021Member-onlyTesting Redis Clients in Node.js with Testcontainers NodeWrite unit tests that consume a real Redis with Testcontainers Node and Docker. Automated testing is an essential aspect of ensuring the quality of any software product. However, it can often be challenging to test systems that rely on databases or other external resources. Luckily, Testcontainers is a great project that makes setting up external resources more comfortable by providing a programmatic interface…Testing3 min read
Published in Level Up Coding·Jun 21, 2020Member-onlyReactive Streams in JavaScript with RSocket FlowableMessage streaming, back-pressure, cancellation, and async programming in JavaScript with rsocket-flowable. When programming async operations, JavaScript developers are generally at least familiar with Promises, async/await, and callbacks. However, newer async models such as ReactiveX (RxJS in JavaScript), are not quite as popular. …Rsocket7 min read
Published in The Startup·May 29, 2020Member-onlyThe State of RSocket in JavaScriptRSocket is an exciting new advancement in the application protocol space with decent adoption and support in the Java ecosystem, largely due to contributions to the Java implementation from companies such as Pivotal, and decent support for RSocket in the popular Spring framework. …Programming6 min read
Published in Level Up Coding·Jan 23, 2020Member-onlyReviewing Messaging in Distributed System ArchitecturesReal-time reactive systems are some of my favorite types of systems to build; however, they can be daunting tasks to approach, especially when learning a new programming language or ecosystem along the way. …Programming9 min read
