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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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Swift Tutorial: An Introduction to the MVVM Design Pattern
On every new project, you have the privilege of deciding how you’ll architect the app and organize the code. But if you don’t pay attention, or you rush through coding, you risk ending up with spaghetti code. The solution? Use a proper design pattern.
In this tutorial, Toptal Software Engineer Dino Bartošak explains how to implement an MVVM design pattern on a demo Swift application.

Dino Bartošak
Dino is a software engineer specializing in iOS programming clean code and clean architecture, building iOS apps from scratch and custom UI.
A Beginner’s Guide to Managing Software Development With Kanban and Trello
While the success of your project depends on many factors, one of the most common reasons projects fail is a lack of management or downright bad project management.
In this post, Lead Engineering Editor Demir Selmanovic teaches you the basics of Agile project management using Kanban and Trello.

Demir Selmanovic
Demir is a developer and project manager with over 15 years of professional experience in a wide range of software development roles.
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Time Management Secrets of an Efficient Engineer
Freelancers work flexible hours, but this convenience comes at a price: They have to manage their time better than on-site professionals. However, it also means they’re free to optimize their routine and achieve exceptional efficiency.
In this post, software engineer Dmitry Ryazantsev will guide you through the ins and outs of personal time management, leaving little to chance. What good are great rates if you waste hours each week?

Dmitry Ryazantsev
Dmitry’s Android dev experience includes work on the Yandex browser (10M+ installs) and creating his own game, which has 250,000 installs.
Meet Phoenix: A Rails-like Framework for Modern Web Apps on Elixir
In back-end software development, increased productivity often comes at the cost of performance. In this article, Toptal Software Engineer Eduardo Bautista shows us how the Phoenix framework builds on the familiar concepts from the Rails world, and makes it even easier to build robust concurrent applications without compromising performance.

Eduardo Bautista
Eduardo worked for several successful startups, and has extensive experience with international clients, including enterprise clients.
Immutability in JavaScript Using Redux
In an ever growing ecosystem of rich and complicated JavaScript applications, there’s more state to be managed than ever before: the current user, the list of posts loaded, etc.Managing state can be hard and error prone, but immutability and Redux- a predictable state container for JavaScript apps- can help significantly.
In this article, Toptal Programmer David Xu talks about managing state using immutability with Redux, a predictable state container.

David Xu
David has taken several mobile apps from an idea to millions of users worldwide as the Chief Architect of Castle Global, Inc.
A Guide to Managing Webpack Dependencies
The Webpack module bundler processes JavaScript code and all static assets, such as stylesheets, images, and fonts. However, configuring Webpack and its dependencies can be cumbersome and not always a straightforward process, especially for beginners.
In this article, Toptal Software Engineer Andrej Gajdos provides a guide with examples on how to configure Webpack for different scenarios and points out the most common pitfalls connected to project dependencies and their bundling when using Webpack.

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.
How to Build a Multilingual App: A Demo With PHP and Gettext
Making your website or web app available to a wider audience often requires it to be available in multiple languages. For non-English projects, you can increase your audience by releasing it in English as well as your native language. Internationalizing and localizing your project, however, becomes a much easier process if you start during its infancy.
In this article, Toptal Software Engineer Igor Gomes dos Santos shows us how to leverage simple tools, like Gettext and Poedit, to internationalize and localize a PHP project.

Igor Santos
With a big eye on UI/UX, Igor is a developer with strong PHP background (10+ years), moving into JS-land for more interactive experiences.
Realm Is the Best Android Database Solution
Since the inception of the platform, Android developers have had pretty much only one option for a database: SQLite. Although feature-rich and powerful, it wasn’t quite what Android app developers needed. Realm, a modern, efficient database solution for mobile platforms, turned out to be an amazing replacement for SQLite on Android.
In this article, Toptal Software Engineer Mateus Gondim Romão Batista explains why you should use Realm for your next Android application.

Mateus Gondim Romão Batista
With nearly a decade of Java experience, Mateus (BCompSc) has done web projects using Python, Django, and JS, lately focusing on Android.
PostCSS: Sass’s New Play Date
PostCSS is the hot new tool that’s making the rounds on the front-end side of web development. It has been quickly and widely adopted, and possibly will have a significant impact on how we base our present-day CSS.
In this article, Toptal Software Engineer Nicolás J. Engler introduces us and guides us on how to start using this tool, expand it with plugins, or integrate with other CSS processors, task runners, or bundlers.

Nicolás J. Engler
Nicolás is a product designer with a proven background creating and developing both physical and digital experiences.
Make Your Web Front-end Reliable with Elm
If you’ve spent your fair share of time developing web front-ends, you know that no amount of libraries and plugins are sufficient enough to make the development experience pleasant. Unpredictable event chains, complex data binding, and lack of structured data modeling only makes things worse.
Elm, a programming language built for front-end development, cuts to the root of all these problems and solves them there.
In this post, Toptal Software Engineer Stanislav Davydov provides a detailed guide to Elm and shows us how The Elm Architecture solves some of the most fundamental challenges of front-end development.

Stas Davydov
Stanislav’s 18+ years in organizations of all sizes have focused on eCommerce, complex web services, friendly UI, and data mining/scraping.
The Art of Building Self-service Admin Areas
Software is regular and predictable, so it seems paradoxical that practically every web app needs a sizable administrative area. The explanation for this paradox lies in software’s interaction with humans. While you probably can’t build a fully automated system, there’s a lot you can do to save time and money.
In this post, Entrepreneur Jack Kinsella explains what you can do to streamline administration, thus saving valuable time and making your projects more profitable. Adminimisation is the word of the day!

Jack Kinsella
Jack has a background in law and is currently interested in probability, algorithmic education and blockchain.
Don't Hate WordPress: 5 Common Biases Debunked
Today, WordPress covers more than 50 percent of website shares and serves nearly 60 million websites worldwide. Its popularity has resulted in many misconceptions that have grown and spread like a forest fire, and have made people stay away from WordPress.
In this post, Toptal Software Engineer Donald Mudenge explains the five most common WordPress taboos and myths, clarifies them, and offers solutions on how to overcome them.

Donald Mudenge
As a wordpress developer, Donald’s main focus is understanding project requirements and providing the best solution to the problems.
A Node.js Guide to Actually Doing Integration Tests
Your software isn’t fully tested until you write integration tests for it. While unit tests help ensure that functions are properly written, integration tests help ensure that the system is working properly as a whole.
In this article, Toptal Software Engineer Luka Blažecki uses Node.js to explain why integration testing is important for every development platform and how to write clean, composable integration tests.

Luka Blažecki
Luka (MCS) is a team leader focused on back-end solutions that scale. He’s fluent in Node.js, SQL, and NoSQL databases as well as AWS.
The Ultimate Guide to Building a WordPress Plugin
WordPress plugins can be both a blessing and a curse. With more than 45,000 plugins available in its official repository, WordPress users can customize their website to their heart’s content. However, not all plugins follow the standards necessary to keep the platform performant and secure while also delivering a solid user experience.
In this tutorial, Toptal Software Engineer Ratko Solaja shows us how to build a robust WordPress plugin, following all the necessary best practices.

Ratko Solaja
Ratko enjoys creating compelling websites that excite users. He is a regular WordCamp and WordPress Metup speaker.
How to Make an Android and iOS App in C# on Mac
In the past few years, Microsoft has pulled a few aces from up its sleeve. Yes, they messed up Skype, failed with smartphones, and almost succeeded with tablets. But they did some really amazing things as well.
Relinquishing their closed empire approach, they open-sourced .NET, joined the Linux Foundation, released SQL Server for Linux, and created this great new tool called Visual Studio for Mac.
In this post, Head of Open Source Demir Selmanovic details how to make an Android and iOS app in C# on your Mac.

Demir Selmanovic
Demir is a developer and project manager with more than 15 years of professional experience in a wide range of software development roles.
The Definitive Guide to NoSQL Databases
Limited SQL scalability has prompted industry leaders like Google and Amazon to develop NoSQL database management systems that optimize for performance, reliability, and consistency. In this article, Senior Software Engineer Mohammad Altarade explores some of the most popular NoSQL database options on the market and explains why this paradigm for storing and retrieving data will be with us for years to come.

Mohammad Altarade
Mohammad is an engineer and data scientist working at the intersection of software and hardware. As a senior .NET engineer at ProGineer Technologies, he wrote complex SQL queries to retrieve big data, and developed statistical analysis and interactive visualization reports. He has extensive experience with yield management systems and fault detection and classification in semiconductor manufacturing.
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