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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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How to Choose the Best Front-end Framework
No single front-end framework will fit every web project. Compare React, Vue.js, Angular, and Ember.js so you can choose the best one for your needs.

Giorgi Bakradze
Giorgi is a full-stack developer with deep expertise in JavaScript. He has diverse project experience, including creating multilanguage UIs, multiplatform apps, CI/CD pipelines, video tutorial REST APIs, and large-scale SPAs for e-commerce sites.
Implementing Serverless Node.js Functions Using Google Cloud
Serverless computing is an architecture style in which the code is executed in a cloud platform where we don’t need to worry about the hardware and software setup, security, performance, and CPU idle time costs. It’s an advancement of cloud computing that goes beyond infrastructure that abstracts the software environment as well. It means no configuration is required to run the code.

Vignes Aruljothi
Vignes specializes in web technologies and has many years of experience in building scalable applications using JavaScript and Node.js.
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Common Mistakes in Client Communication: How to Not Frustrate Your Client
This article will help you identify and address various communication issues that can plague off-site professionals. Whether you’re a full-stack developer, a UI designer, or a content creator, these easy to memorize tips will help you hone your communication skills.

Andreza Cristina da Silva
Andreza, a former fellow at CERN, has worked at different stages & on different types of software projects. Lately, she focuses on iOS apps.
Conquer String Search with the Aho-Corasick Algorithm
The Aho-Corasick algorithm can be used to efficiently search for multiple patterns in a large blob of text, making it a really useful algorithm in data science and many other areas.
In this article, Toptal Freelance Software Engineer Roman Vashchegin shows how the Aho-Corasick algorithm uses a trie data structure to efficiently match a dictionary of words against any text.

Roman Vashchegin
Roman is a SharePoint and .NET developer with a proven ability to develop efficient, scalable, and stable solutions for complex problems.
Web Accessibility: Why W3C Standards Are Often Ignored
The goal of this article is to introduce you to the underlying principles of accessibility and help you flawlessly implement web accessibility guidelines and standards on your next project. Even minor improvements can help your content rank better, reach more people, and improve the overall user experience.

Cezary Tomczyk
Cezary’s two decades as a software engineer and project manager have seen him working at Apple, Microsoft, Nokia, and Oracle, among others.
Maximum Flow and the Linear Assignment Problem
The Hungarian graph algorithm solves the linear assignment problem in polynomial time. By modeling resources (e.g., contractors and available contracts) as a graph, the Hungarian algorithm can be used to efficiently determine an optimum way of allocating resources.

Dmitri Ivanovich Arkhipov
Dmitri has a PhD in computer science from UC Irvine and works primarily in UNIX/Linux ecosystems. He specializes in Python and Java.
Getting Started With the SRVB Cryptosystem
This article will give you an introduction to the principles behind public-key cryptosystems and introduce you to the Santana Rocha-Villas Boas (SRVB) cryptosystem, developed by the author of the article and prof. Daniel Santana Rocha. The algorithm authors are making a campaign that includes a financial reward to anyone who manages to crack the code.

Yuri da Silva Villas Boas
Yuri has experience in C++ and a good background in mathematics, statistics, and physics. He developed the SRVB cryptosystems.
Guide to Spring Boot REST API Error Handling
Spring Boot provides beneficial error messages to engineers building REST APIs. Yet, those messages are useless for the general API consumer. We provide a simple approach to improving this functionality.

Bruno Leite
Bruno is a full-stack application architect and developer with more than 10 years of experience and a solid problem-solving track record.
Orchestrating a Background Job Workflow in Celery for Python
In this article, I will try to give you a good understanding of which scenarios could be covered by Celery. Not only will you see interesting examples, but will also learn how to apply Celery with real world tasks such as background mailing, report generation, logging and error reporting. I will share my own way of testing tasks beyond emulation and explain a few tricks that go beyond the official documentation and took me hours of research to discover myself.

Rustem Kamun
Rustem is a back-end dev with expertise in Python and Java stacks. He’s even implemented a scalable M2M cloud platform for vehicle data.
iOS Centralized and Decoupled Networking: AFNetworking Tutorial with a Singleton Class
The Model-View-Controller (MVC) design pattern is great for the longevity and maintainability of an iOS application’s codebase… but you may find yourself adding similar functions to multiple models as your app grows. In cases such as networking, moving common logic out of your model classes and into singleton helper classes can be a better approach. In this article, I’ll teach you how to set up a centralized singleton networking object that, decoupled from micro-level MVC components, can be reused throughout your application.

James Cahall
James is a veteran, result-driven engineer with 7+ years of C-level experience. He is lead developer of a service with 8 million users.
iOS ARKit Tutorial: Drawing in the Air with Bare Fingers
With augmented reality on the rise, more and more libraries and tools are developed to tap into that market. Apple recently released ARKit, which shows great promise through power and simplicity of use.

Osama AbdelKarim AboulHassan
Osama has 8+ years of experience developing iOS/Mac apps, and leading technical teams. He also co-founded a startup with 10m users worldwide
A How-to Guide to SVG Animation
The advantages of SVG on the web go beyond producing resolution-independent graphics. With a little CSS and JavaScript, you can apply cool animations and effects to your front end without requiring the user to install bulky plugins.

Juan Calou
Juan is a systems engineer since 2005. He is an eager learner, a versatile developer, and has great attention to detail.
Guide to Data Synchronization in Microsoft SQL Server
Sharing related information among isolated systems has become increasingly important. There are many methods to choose from to perform that task for SQL Server, but it’s important to know which is better for each use case.

Andrej Gajdos
With a Master’s degree in Service Science, Management, and Engineering, Andrej works on projects of all sizes for clients around the world.
The 12 Worst Mistakes Advanced WordPress Developers Make
WordPress is a very popular way to get a site up and running quickly. However, in their haste, plenty of developers end up making horrible decisions. Some mistakes, like leaving WP_DEBUG set to “true,” may be easy to make. Others, like lumping all your JavaScript into a single file, are as common as lazy engineers. Whichever mistake you manage to make, read on to find out the 12 most common WordPress mistakes that new and seasoned developers make.

Gabriel Livan
Gabriel is a full-stack web developer based in London, with 7+ years experience in PHP and WordPress plugin and theme development.
Creating a Ruby DSL: A Guide to Advanced Metaprogramming
Write better Ruby code by leveraging its metaprogramming features. In this article, you will learn how to create your own Ruby domain specific language (DSL).

Máté Solymosi
Máté is a full-stack software engineer with 8+ years of experience in JavaScript, Node.js, Angular, Ruby on Rails and PHP.
A Guide to Process-oriented Programming in Elixir and OTP
Process-oriented programming is a paradigm in which the process structure and communication between processes of a system are the primary concerns. That’s the paradigm, but how does it work in real life?

Michael Latta
Michael is a software engineer with deep technical and leadership skills. As an entrepreneur, he is both a leader and a team player.
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An Angular 5 Tutorial: Step by Step Guide to Your First Angular 5 App
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