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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Smart Node.js Form Validation

by Andrej Adamcik

Bulletproof data validation is fundamental to implementing a back-end API. Find out how datalize, a Node.js library, makes this easy—and formats your data nicely, too.

8 minute readContinue Reading
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Working with the React Context API

by Boris Yordanov

The React Context API was been around as an experimental feature for a while now but finally became safe to use in production last year, solving one major problem React problem — prop drilling. In this article, Toptal Freelance Javascript Developer Boris Yordanov will introduce us to the API and illustrate it with two basic web store apps, one built with the Context API and one without it.

5 minute readContinue Reading
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Advanced Concurrency in Swift with HoneyBee

by Alex Lynch

Handling concurrency in Swift can cause headaches and pyramids of doom. HoneyBee is a futures/promises library that makes concurrent programming easy, expressive, and safe. Join Toptal Swift Developer Alex Lynch in exploring the performance and readability advantage of using this library.

13 minute readContinue Reading
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How to Make a Discord Bot: an Overview and Tutorial

by Randall Schmidt

Discord is a popular real-time messaging platform with robust support for programmable bots. Bots are ubiquitous on Discord and provide a wide range of services, including moderation assistance, games, music, internet searches, payment processing, and more. In this article, Toptal Freelance Software Engineer and Chatbot Developer Randall Schmidt will start by discussing the Discord UI and APIs for bots before moving on to a Discord bot tutorial. We’ll also hear from ImBursting, the developer of Rythm—one of Discord’s most popular bots—and his experiences developing and maintaining his significant infrastructure and codebase.

25+ minute readContinue Reading
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Architecting Optimization Algorithms with HorusLP

by Shanglun Wang

HorusLP is a new Python tool designed to help with the architecture of algorithm development workflows. It provides an architectural framework for the development of optimization algorithms. In this article, Toptal Freelance Software Engineer Shanglun Wang explains how HorusLP came to be and demonstrates its capabilities with a few example algorithms.

22 minute readContinue Reading
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How to Automate Your Business Processes with Salesforce

by Jayant Nathani

Salesforce is probably the most popular CRM platform, with various products giving you the power to put your business thoughts into action. In this article, Toptal Freelance Developer and Salesforce Certified Application Architect and Platform Developer (II) Jayant Nathani explains how Salesforce can help automate your business processes for a more efficient business.

7 minute readContinue Reading
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React Tutorial: How to Get Started and How it Compares

by Kamil Jakubczak

In recent years, React went from being an also-ran in the JavaScript universe to the most popular JS library. However, how does React stack up against Angular and VueJS in 2019? In the first part of our React tutorial series, Toptal JavaScript Developer Kamil Jakubczak outlines the reasons behind React’s popularity and explains how to get started on your first React app.

12 minute readContinue Reading
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State Management in Angular Using Firebase

by Joaquin Cid

Without proper state management, your Angular app will become a UX nightmare. But even with that solved, persisting state across sessions and devices can be tricky. This tutorial shows how to leapfrog that challenge using Firebase.

15 minute readContinue Reading

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