Toptal Engineering Blog

The Toptal Engineering Blog is a hub for in-depth development tutorials and new technology announcements created by professional software engineers in the Toptal network.

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Make Your App Profitable, Part 2 – Harnessing the Mobile Funnel

by Matthew Knippen

Subscription-based apps need a special approach when it comes to analytics. Learn how a variation on the traditional sales funnel helps you work with LTV, subscriber retention, and churn rates to make your app better—and more profitable.

10 minute readContinue Reading
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Creating Your First GraphQL API

by Ioram Gordadze

GraphQL is a domain-specific language for data query and manipulation by Facebook. It is meant to replace the de facto REST standard in API creation. In this article, Toptal Freelance GraphQL Developer Ioram Gordadze creates a GraphQL API from scratch, summarizing problems new GraphQL developers face. He also teaches us to rethink the standard methods used in REST APIs in a more GraphQL-friendly manner.

16 minute readContinue Reading
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Increase Code Maintainability with React Integration Testing

by Anton Rublev

Integration tests provide a lot of value considering the time and effort required for testing. React integration tests improve code maintainability, yet they don’t slow down development. In this article, Toptal Software Developer Anton Rublev demonstrates how you can harness the power of react-testing-library to create superior code without wasting time.

7 minute readContinue Reading
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Avoiding Bad Practices in iOS and Android Design

by Martin Doychev

In an era of cross-platform mobile development, it is crucial to understand the specifics of different operating systems and hardware. In this article, Mobile Developer Martin Doychev lists a number of bad practices employed while creating apps for iOS and Android and explains what you should and shouldn’t do.

9 minute readContinue Reading
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A Software Defined Radio Tutorial: Images from the International Space Station and Listening to Hams with an RTL-SDR

by Amin Shah Gilani

Radio has used fundamentally the same technology since Marconi’s experiments in 1895. However, improved circuit design and signal processing techniques have allowed us to transmit much more and much farther out than before. In this article, with a laptop and less than $30 worth of equipment, we’ll capture images transmitted from the International Space Station and listen to amateur radio conversations at a local repeater.

19 minute readContinue Reading
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The Dart Language: When Java and C# Aren't Sharp Enough

by Star Ford

Five years after Dart 1.0, Google's rewritten open-source language is attracting increasing numbers of developers. What do C# and Java developers need to know to get started with it?

13 minute readContinue Reading
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How to Create a Swipeable UITabBar From the Ground Up

by George Vashakidze

Apple’s iOS SDK features a bevy of built-in UI components, but what happens when you decide you need a bit more? What if you need to create a swipeable UITabBar? In this post, Toptal iOS Developer George Vashakidze explains how he tried using a third-party library, and why he chose to create his own solution instead.

9 minute readContinue Reading
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How to Approach Modern WordPress Development (Part 2)

by Andrey Shalashov

WordPress code, especially back-end PHP code, is often a mess—even in WP core! But legacy code is no excuse. Find out how to develop WP customizations the right way, so your code is readable and maintainable.

13 minute readContinue Reading

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