TypeScript Developers Hiring Guide

JavaScript, Enhanced

The second-most-loved programming language, according to Stack Overflow’s annual survey, TypeScript is essentially JavaScript with some additional features.

The enormously popular language already has a huge following. As of 2020, 60% of JavaScript developers already used it, and another 22% wanted to try it out. As a frequently-named most promising language, TypeScript appears in a number of huge companies’ stacks, including:

  • Microsoft
  • Slack
  • Accenture
  • Asana
  • Lyft
  • Nike
  • Dell
  • JPMorgan Chase
  • Medium
  • DISH

Are you looking to add TypeScript to your own stacks? Then you’ll need a top developer who is experienced in the language. Here’s your guide to finding the best of the best.

  • Hiring Guide

  • Interview Questions

  • Job Description

TypeScript: A Summary

TypeScript, a portable, cross-platform, open-source language is essentially a tweaked version of JavaScript. In fact, it’s translated into JavaScript during its execution. Using all the same components as its parent language, TypeScript is accessible to engineers who understand and use JavaScript, too. 

Developers can take advantage of all JavaScript tools, including libraries, frameworks, and more. TypeScript can run on any JavaScript-supported environment. Like its parent language, it can be used for both frontend and backend development. 

That said, it has a number of benefits that elevate the language. For example, it has the addition of static typing, which makes it more readable. It’s also considered more expressive than JavaScript. Additionally, it’s very easy to debug thanks to a high-level debugger.


What to Look for in a TypeScript Developer

First things first: any TypeScript developer must have a solid grounding in JavaScript, with several years of experience using the older programming language. You should also search for someone who is capable of building complex applications, usually with TypeScript itself. Ask for evidence of experience successfully completing these types of projects.  

Given TypeScript’s overwhelming popularity, you are unlikely to have a difficult time finding an experienced, qualified developer specializing in the language. And because it’s essentially JavaScript, an engineer who knows the parent language will be able to pick it up quickly. That’s not to say a JavaScript developer automatically knows how to code with TypeScript, but it does help considerably.

Still, since so many developers are eager to learn TypeScript, it’s a win-win.

Why should you use TypeScript?

The main reason to use TypeScript is to build complex or large applications that JavaScript can’t support. The language has a number of advantages, such as optional static typing, compilation — helping you easily spot errors in your code — excellent documentation, cross-platform capabilities, and simple debugging. 

The language is also open-source, and you can use all the tools that assist JavaScript developers, including extensive libraries and frameworks.


How is TypeScript code compiled into JavaScript code?

In a nutshell, developers can use the TypeScript compiler to translate the code into usable, clean JavaScript code. 


When should you not use TypeScript?

While it does come with a number of benefits, TypeScript isn’t ideal for simpler projects. It also takes a long time to compile the code to JavaScript, so it’s not the best choice for small-scale projects that require a quick turnaround. You should use JavaScript in these instances instead of TypeScript.


Explain the differences between JavaScript and TypeScript

TypeScript is built on and compiles to JavaScript. The main additions are static typing, more syntax and type support options in general, and compiler capabilities. While TypeScript isn’t necessarily superior to JavaScript for every project, it does lend a better development and user experience to particularly large and complex projects.


When and why should you use TypeScript over JavaScript?

The main purpose behind TypeScript is to facilitate projects JavaScript can’t handle. When your project grows in size — beyond JS’s limitations — or becomes increasingly complex, it’s a good idea to turn to TypeScript and then compile the code. JavaScript, after all, wasn’t built with these types of projects in mind. With the newer alternative, you’ll have an easier time catching mistakes. You’ll also end up with more modern, robust features.


What are the components of TypeScript?

Because TypeScript is more than just a language, it has several components. There is, of course, the language itself, including the keywords. There’s also the compiler, which translates the instructions and code into its JavaScript counterparts. The final piece is the Language Service, which essentially provides editing services to the developer. 

Below is a sample job description for a TypeScript developer. Customize it based on your business’s unique needs and requirements.

We are looking for a TypeScript developer who is well-versed in additional programming languages to build large-scale applications, scale current products, and optimize the user experience. In this senior-level role, you’ll also oversee junior team members.


Responsibilities

  • Lead a small development team
  • Focus on backend development
  • Leverage TypeScript, JavaScript, and other programming languages to build large-scale apps
  • Research client and stakeholder requirements
  • Write clean code
  • Debug code
  • Create and deploy unit tests
  • Research best practices to focus on and optimize the user experience
  • Collaborate with QA specialists, designers, and other team members
  • Scale existing apps as needed
  • Research and implement means of improving the development process

Skills

  • At least 2 years of experience using TypeScript
  • At least 7 years of experience using JavaScript
  • Knowledge of HTML/CSS
  • Experience with CI/CD
  • Knowledge of Angular, Node, React, Jenkins, Git, and Knockout
  • Knowledge of SASS
  • Strong problem-solving, collaboration, interpersonal, and written and verbal communication skills
  • Experience with Ajax
  • Experience with functional programming
  • Bachelor’s degree in computer science or a related field (equivalent experience reviewed on a case-by-case basis)

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