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When it comes to client-side and server-side web/app design, JavaScript is one of the best programming languages a developer can work with. However, it has quite a few limitations; for instance, reassigning data types when using JavaScript will tend to result in performance inconsistencies. TypeScript exists to remedy issues like this.

Some people describe TypeScript as JavaScript, but with more in the basket — they’re not wrong. TypeScript contains all of JavaScript. Both languages even share the same syntax, with similar loops, conditional statements, variables, functions, and all. However, TypeScript adds classes, modules, static typing, and type safety, allowing programmers to be more explicit about data types in their code. Very importantly, TypeScript transpiles to JavaScript, and modern browsers can only understand it after this transpilation. So, to use TypeScript on a modern browser, developers often have to rely on transpilation options like the default TypeScript compiler (which can also perform type-checking) or the Babel compiler.

Though relatively new, TypeScript is not an obscure programming language by any measure. In 2022, Jetbrains’ State of Developer Ecosystem rankings showed it was the fastest-growing programming script. Moreover, as more companies began to hire TypeScript developers for their projects, the language’s market share nearly tripled over six years — from 12% in 2017 to 34% in 2022. As of 2023, many developers favor TypeScript as it continues to redefine the JavaScript ecosystem.

In 2021, TypeScript had the most potential among other programming languages, and as of 2023, more developers seem interested in it as a primary language than even Vanilla JavaScript. More than 20% of developers now use TypeScript exclusively, compared to just over 8% for JavaScript. We also see its popularity reflected in its over 40 million installs as of October 2023.

If you look at the list of startups that hire TypeScript developers, you will find many popular and successful names. Software development companies like Tech Stack, publishing firms like Medium, delivery startups like DoorDash, and online trading platforms like Bitpanda are just a few. Altogether, these and other companies provide an ever-growing demand for TypeScript developers for hire. If you’re wondering why all these parties favor TypeScript or why you should, here are a few reasons.

• Intuitive and Easy to Learn: If you have some experience with JavaScript, you might be aware of its non-intuitive type-casting rules and how they tend to result in a few subtle bugs slipping by unnoticed. TypeScript is way more intuitive, especially in its syntax — at least if you are experienced. But even if you are not too experienced, the syntax is very readable and concise, so it’s quite easy to master.
  
  If you’re already familiar with JavaScript, learning TypeScript is a breeze. The fact that the latter is based on the former means a developer does not have to learn too many new things to understand and use it.
• Static Typing Available: TypeScript inherits the dynamic typing of JavaScript, which allows freer programming but tends to result in more bugs. However, it also brings optional static typing to the table, enabling speedier and less bug-resultant programming. The TypesScript compiler uses the language’s syntax to identify bugs before they appear, and the result is cleaner JavaScript, especially Vanilla.
• Modern Tooling Features: The complexity of modern software projects means that even more advanced features are needed for developers to operate effectively and efficiently. In this regard, companies that hire TypeScript engineers don’t find themselves behind. Modern tooling features like autocompletion, cross-module refactoring, type inference, and module import recommendations are available when using the language. These features are available because of TypeScript’s interpretational mechanics, in which the TypeScript AST and the language are integrated within the editor.
• Added Language Features:TypeScript is strongly typed, unlike weakly typed JavaScript. What that means is that you can declare specific types for variables and other data structures, and the TypeScript vets their validity. For example, you can specify a variable as a string or a boolean.
  
  Aside from strong type inference, other features that have annoyed JavaScript users by their conspicuous absence have been implemented in TypeScript for a long time. Take the ‘too few/too many parameters’ error messages, for example, which now make working with functions much easier. Additionally, there are protected, public, and private access modifiers, as well as Enums, which allow developers to define sets of named constants. There are also decorators for the declarative addition of metadata to code.
  
  All these features make implementing concisely defined and reusable data structures easier, resulting in better code readability.
• Stable and Reliable:The relative stability and reliability of TypeScript are very convenient for businesses that use the programming language. For starters, it helps that the language is backed by a corporate giant like Microsoft, which provides some assurance that TypeScript isn’t going anywhere. Additionally, with its boatload of resources and human resources, Microsoft can ensure a regular release cycle. With each second release, there are significant improvements as well as newer and more robust language constructs.
• Solid IDE Support:Originally, the only IDE that supported TypeScript was Microsoft’s Visual Studio core editor. However, many years and lots of growth in popularity later, there are many more core editors and IDEs that can run TypeScript, some natively, some via plugins. Eclipse, Atom, Webstorm, and Sublime come to mind. These IDEs don’t just support the programming language, however. They also provide their own features, such as parameter method suggestions, hints, autocompletion, and syntax highlighting.
  
  These IDE integrations allow developers to cut out unreachable code or redundant imports as well as add those that are needed. They also streamline things for companies that work with or hire TypeScript developers. When working on TypeScript projects, such companies can count on a more streamlined development process, where the programmer can focus on the more pertinent aspects of programming.
• Good Developer Community: Two more items on the plus side of TypeScript are its developer community and support, which are just marvelous. There are over 13 million JavaScript developers in the world, and that includes TypeScript developers. Many of these people work tirelessly to improve the quality of this open-source programming language. This large developer community is also easily accessible on forums like the TypeScript Discord server, and any developer can find the technical assistance they need on any project. So, if you hire a TypeScript developer, their personal expertise is not all that’s available to you; the rest of the TypeScript developer community is also available to you by extension.

It’s clear that TypeScript, as a programming language, offers many benefits that explain its ever-growing popularity. We also know that all kinds of companies, from media startups to tech firms, hire TypeScript developers at an ever-growing rate. Naturally, the next question on your mind is what business such developers attend to in these companies. Let’s look at some of the main roles you hire a dedicated TypeScript developer for.

• Planning, Developing, and Implementing Projects Leveraging TypeScript: When a company project requires TypeScript programming, the TypeScript developer is at the center of it. Their job begins with conceptualizing the software or program they need to make, conducting research and feasibility studies, and putting everything together into a proof of concept. Once the executives give the green light, the developer must plan, organize, and execute the development project. Essentially, companies hire dedicated TypeScript developers to leverage the full-stack resources of both TypeScript and JavaScript for app and web development.
• Perform Application Integrations to Meet Startup Requirements: While the capabilities of JavaScript extend appreciably with TypeScript, it is also possible to extend TypeScript capabilities even further. Programmers achieve this through integration with some needed tools. These include build tools like Babel, Grunt, Browserify, and MSBuild.
• Building and Implementing UI Components: While hundreds of frameworks and front-end libraries exist, it is sometimes necessary for a developer to build their own. This is especially due to the demands of some projects requiring more low-cost and specialized components that may not yet exist in any ecosystem. When such situations arise during a project, the team needs a TypeScript developer to handle them.
• Working on Maintenance and Bug-Fixing: Both during and after the development process, it will be necessary to run periodic tests and diagnostics to identify bugs and other potential points of failure in code. Once the programmer has identified the bugs, debugging follows. This operation generally involves using a source map, a file that maps TypeScript code to a generated JavaScript one. This allows the developer to scan through the code using convenient dev tools, set breakpoints, and inspect variables, all the while viewing the original TypeScript.
  
  There are also code reviews, otherwise known as ‘peer reviews.’ In a code review exercise, teams of developers methodically go through code to identify bugs, improve code quality, and make it easier for other developers to learn the source code. Any startup that uses TypeScript to any degree may need to hire a dedicated TypeScript developer because expertise in this programming language will prove very useful when doing code reviews.
• Collaborating with Development Team Members: During a TypeScript development project, a TypeScript programmer will often have to work with other developers. This includes brainstorming for ideas and concepts for a project, planning and organizing the project, and coordinating the team’s efforts. However, not all projects are necessarily TypeScript-centered. Some may only require some input from a TypeScript engineer, which will also be their job to offer. They may provide assistance with shared code projects or ensure disciplined use of TypeScript code and process documentation.

If you hire a dedicated TypeScript developer as part of your IT team, you're pretty much assured of a smoothly operating front and back end. However, that depends on whether or not you have hired a candidate worth the expenditure. With an average annual salary of up to $102,000, it costs quite a bit not just to hire TypeScript developers but also to retain them. With that information, what skills should you look for to get the best out of your prospective employee?

Proficiency in Programming Languages, Especially TypeScript and JavaScript: It's all well and good to hire a TypeScript developer who has a strong, albeit exclusive, command of TypeScript and JavaScript. However, hiring developers with at least a working understanding of many other languages is the best way to go. The more programming languages a TypeScript developer knows, the greater the experience and versatility they can bring to your table.

Thorough Knowledge of Databases: Building elaborate software programs with any programming language requires a solid grasp of and capacity to use databases. They must be able to use relevant tools to organize, modify, and update databases as needed. They must also be able to build their own databases.

Understanding of Frameworks, Libraries, and Integrations: Before you hire a TypeScript developer, you have to be sure they understand not just the standard TypeScript library but also other libraries and frameworks, such as React and Native. You also need to know that they understand how to integrate these external frameworks and libraries.

Familiarity with UI Components: You may recall that building custom UI components is one of the jobs for which startups hire TypeScript developers. You must ensure that your candidate understands the UI components of JavaScript and TypeScript and can build custom ones when needed.

Interpersonal, Problem-solving, and Time-management Skills: Before companies hire TypeScript engineers, time management, problem-solving, and liaison are the most critical soft skills they look for. An effective and efficient TypeScript engineer is one who not only knows their stuff but can coordinate effectively with team members, come up with smart solutions to development problems, and complete objectives on or even ahead of schedule.

Additionally, you should also hire dedicated TypeScript developers who can communicate effectively. Good communication skills will come in handy during brainstorming sessions, executive briefings, and even the day-to-day activities within the development cycle.