The 10 Most Common JavaScript Issues Developers Face
At first, JavaScript may seem quite simple. Yet the language is significantly more nuanced, powerful, and complex than one would initially be led to believe. Many of JavaScript’s subtleties lead to a number of common problems—10 of which we discuss here—that keep code from behaving as intended. It’s important to be aware of and avoid these pitfalls in one’s quest to become a master JavaScript developer.

Ryan J. Peterson
Using Kotlin for Back-end Development: A Quick Overview
Kotlin has features that make it an ideal language for back-end development. Learn what these features are and how you can use them to create high-performing systems.

Boldizsar Akos Mezei
How to Approach Modern WordPress Development (Part 2)
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.

Andrey Shalashov
SQL Database Performance Tuning for Developers
Database tuning can be an incredibly difficult task, particularly when working with large-scale data where even the most minor change can have a dramatic (positive or negative) impact on performance.
In mid-sized and large companies, most database tuning will be handled by a Database Administrator (DBA). But there are plenty of developers who have to perform DBA-like tasks; meanwhile, DBAs often struggle to work well with developers.
In this article, learn database tuning tips and how developers and DBAs can work together effectively.

Kevin Bloch
MySQL Master-Slave Replication on the Same Machine
Developers often work on only one machine, and have their whole development environment on that machine. Testing database replication before deploying changes in this kind of a development environment can be a challenging task.
In this article, Toptal engineer Ivan Bojovic guides us through a step-by-step tutorial on how to implement MySQL master-slave replication on one machine.

Ivan Bojovic
How to Tune Microsoft SQL Server for Performance
To retain its users, any application or website must run fast. For mission critical environments, a couple of milliseconds delay in getting information might create big problems. As database sizes grow day by day, we need to fetch data as fast as possible, and write the data back into the database as fast as possible. To make sure all operations are executing smoothly, we have to tune Microsoft SQL Server for performance.

Sripal Reddy Vindyala
Buggy Java Code: The Top 10 Most Common Mistakes That Java Developers Make
Java, a sophisticated programming language, has been dominating a number of ecosystems for quite a while. Portability, automated garbage collection, and its gentle learning curve are some of the things that make it a great choice in software development. However, like any other programming language, it is still susceptible to developer mistakes.
This article explores the top 10 common mistakes Java developers make and some ways of avoiding them.
Mikhail Selivanov
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.

Balint Erdi
The 10 Most Common Mistakes Web Developers Make: A Tutorial for Developers
Today we have thousands of digital and printed resources that provide step-by-step instructions about developing all kinds of different web applications. Development environments are “smart” enough to catch and fix many mistakes that early developers battled with regularly. There are even many different development platforms that easily turn simple static HTML pages into highly interactive applications.
All of these development patterns, practices, and platforms share common ground, and they are all prone to similar mistakes caused by the very nature of web applications.

Demir Selmanovic
World-class articles, delivered weekly.
Toptal Developers
- Algorithm Developers
- Angular Developers
- AWS Developers
- Azure Developers
- Big Data Architects
- Blockchain Developers
- Business Intelligence Developers
- C Developers
- Computer Vision Developers
- Django Developers
- Docker Developers
- Elixir Developers
- Go Engineers
- GraphQL Developers
- Jenkins Developers
- Kotlin Developers
- Kubernetes Experts
- Machine Learning Engineers
- Magento Developers
- .NET Developers
- R Developers
- React Native Developers
- Ruby on Rails Developers
- Salesforce Developers
- SQL Developers
- Sys Admins
- Tableau Developers
- Unreal Engine Developers
- Xamarin Developers
- View More Freelance Developers
Join the Toptal® community.