Toptal Engineering Blog

The Toptal Engineering Blog is a hub for in-depth development tutorials and new technology announcements created by professional freelance software engineers in the Toptal network.
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Nikolay Derkach
A Tutorial for Reverse Engineering Your Software's Private API: Hacking Your Couch

Reverse engineering and hacking are usually related to malicious activities that result in sleepless nights of engineers responsible for system maintenance.

Reverse engineering is a tool that we can utilize to find the flaws and improve our software in many aspects. This article shows us how to use these techniques to learn more about different implementations of web API.

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Leonardo Andrés Garcia Crespo
React.js View State Management Tutorial

One of the biggest and most common problems in front-end web development is state management. A developer is constantly focused on keeping the state object in sync with its view and the DOM representation. Users can interact with the application in many ways and it’s a big task to provide a clean transition from one view state to another.

We will see how using React JavaScript library can help us reduce application complexity and offload UI transitions from our application.

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Ahmed AbdelRazzak
The Publish-Subscribe Pattern on Rails: An Implementation Tutorial

The publish-subscribe pattern] (or pub/sub, for short) is a messaging pattern where senders of messages (publishers), do not program the messages to be sent directly to specific receivers (subscribers). Instead, the programmer “publishes” messages (events), without any knowledge of any subscribers there may be.

This article provides insight in how to use the pub/sub pattern, in Rails, to communicate messages between different system components without these components knowing anything about each other’s identity.

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Ivan Dimoski
Tips for Developing an Android App: My Lessons Learned

This article provides an overview on building a great Android application, from defining an idea to releasing an application to the store. Toptal developer Ivan Dimoski gives us a chance to learn from his experience in making Ooshies, an Android Live Wallpaper designed to give you a hug and make you feel loved each time you interact with your Android device.

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Mahmud Ridwan
Separation Anxiety: A Tutorial for Isolating Your System with Linux Namespaces

Linux namespaces make it possible to run a whole range of applications on a single real machine and ensure no two of them can interfere with each other, without having to resort to using virtual machines. In a single-user computer, a single system environment may be fine. But on a server, where you may want to run multiple services, it is essential to security and stability that the services are as isolated from each other as possible.

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Xiaolei Liu
Bypassing Chinese Internet Censorship: How I Built a Censored Microblog Aggregator

As is known worldwide, the Chinese government enforces strict censorship on the internet. Virtually everything is under the government’s surveillance. In order to be allowed to operate, ISPs and internet content providers in China usually have their own content filtering mechanism for blocking or removing the published content by its users, or even deleting users’ account directly if they are assumed to be illegal under the government policy.

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Ivan Dimoski
Top 10 Most Common Mistakes That Android Developers Make: A Programming Tutorial

There are thousands of different Android powered devices, with different screen sizes, chip architectures, hardware configurations, and software versions. Unfortunately, segmentation is the price to pay for openness, and there are thousands ways your app can fail on different devices.

Regardless of such huge segmentation, the majority of bugs are actually introduced because of logic errors. These bugs are easily prevented, as long as we get the basics right!

Here’s a quick rundown of the 10 most common mistakes Android developers make.

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Balint Erdi
JavaScript Promises: A Tutorial with Examples

Promises are a hot topic in JavaScript, and you should definitely get acquainted with them. They are not easy to wrap your head around, it can take a few articles, and a decent amount of practice to comprehend them. Aim of this article is to help you understand Promises, and nudge you to get more practice using them.

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Marco Mustapic
An iOS Developer’s Guide: From Objective-C to Learning Swift

After 6 years of improving and working on Objective-C, Apple decided to throw another challenge at developers. Once again, iOS developers will need to learn a new programming language: Swift.

Swift 1.0 is already a stable and strong development platform, which is sure to evolve in interesting ways over the coming years. It is a perfect moment to start exploring this new language, as it is the future of iOS development.

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