5 Javascript Skills Junior Front-End Engineers Should Have

JavaScript is a powerful programming language that can create rich, interactive web applications. Front-end engineers skilled in JavaScript can create user interfaces and interactions that are both responsive and engaging.

One of the great things about JavaScript is that it can be used to create various applications. From simple websites to complex single-page applications, JavaScript can be used to create anything that can be imagined.

When looking for junior front-end engineers, finding candidates with a strong understanding of JavaScript is essential. The ability to create responsive and engaging user interfaces is essential for any front-end engineer. Candidates demonstrating their JavaScript skills will be the best candidates for the job.

With that said, here are five essential JavaScript skills that every junior front-end engineer should have.

1. A Strong Understanding of HTML and CSS

As front-end engineers, they will be responsible for building the user interface and ensuring it looks great on all devices. This requires a strong understanding of HTML and CSS, the foundation of any web page or application.

Junior front-end engineers should be able to write well-structured, clean, and semantically correct code. In addition, they should also be familiar with CSS cascading and inheritance and be able to write efficient and maintainable CSS selectors.

2. Basic JavaScript Knowledge and Coding Skills

To be a successful junior front-end engineer, they should have a solid understanding of the basics of the JavaScript language. This includes understanding concepts such as variables, data types, loops, functions, and objects.

In addition, they should also be able to write code that is clean, well-organized, and easy to read. This might include code that creates a grid of articles, code that pulls in the correct images and text for each article, and code that allows the user to filter articles by category.

3. Basic Understanding of SEO

As a junior front-end engineer, it is also essential to have a basic understanding of SEO (Search Engine Optimization), how it works and how to optimize web pages for search engines. This includes understanding how to optimize web pages for Google and other search engines.

Some of the things you can do to optimize a web page for SEO include:

  • Using the correct keyword density
  • Using the correct keywords and phrases
  • Creating keyword-rich titles and descriptions
  • Using alt tags for images
  • Creating sitemaps

4. Familiarity and Experience with a Javascript Framework

Many different front-end frameworks and libraries are available, and as a junior front-end engineer, it is essential to be familiar with at least one of them. A front-end framework is a collection of CSS, HTML, and JavaScript code used to create web applications. Some of the most popular front-end frameworks include AngularJS, React, and Vue.js.

In addition to front-end frameworks, many different libraries can be used to create interactive user interfaces. Some of the most popular libraries include jQuery, Lodash, and Moment.js.

5. Basic WordPress Knowledge

WordPress is a content management system (CMS) that enables you to create a website or blog from scratch or to improve an existing website. It is a free and open-source platform that is used by millions of people around the world.

As a junior front-end engineer, you should have a basic understanding of how WordPress works. You should be able to create and edit posts and pages and install and customize themes and plugins. In addition, you should also be familiar with the WordPress coding standards.


If you are looking to hire junior front-end engineers, then you should consider these key JavaScript skills. By focusing on these skills, you can find the best candidates for the job.

Kandio offers JavaScript assessment questions that can help you identify candidates with the skills you are looking for. We recommend using these questions as part of your interview process to help you make the best hiring decisions. Let us help you better understand a candidate's skills and abilities. See our pricing plans and give Kandio a try today!

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