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August 28, 2017 - Marina D

Angular 2 vs Angular 4 Developers. Are There Major Differences?

In the crowded world of JavaScript frameworks, AngularJS has always been one of the big names. This shouldn’t be at all surprising, as its development and maintenance are led by Google, one of the world’s biggest tech companies. The framework has the largest developer community among all frontend JavaScript frameworks. IT has seen tremendous growth since its release and now has 1,602 contributing developers on GitHub, . However, there are currently many versions of this technology, and one is certain to ask: What’s the difference between an AngularJS vs Angular 4 developers, or an Angular2 vs Angular 4 developers? Let’s clarify this to eliminate any confusion.

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Check our article on comparison of React vs Angular, Ember vs Angular, and Aurelia vs Angular technologies.

Demand for Angular Devs in 2017 and Expectations in 2018

Interest in AngularJS vs Angular 4 developers in 2017

Demand for Angular 2, 4, and 5 in 2017 (Source: Google Trends)

Angular JavaScript is one of the most popular and widely-used front end development frameworks. Despite AngularJS being the earliest release, the demand for such developers still continues to be high. According to Google Trends the trend in the interest in the discussed technology and its subsequent releases – Angular 4 and Angular 5 – for the last 12 months. It is evident that interest in the second version is far more popular than in the fourth in all countries, at least in terms of Google search count. This, of course, may very well be because the 4th version is new (released this year), so it has plenty of time to catch up to the popularity of the 2nd version. Still the interest in the subsequent release is climbing towards, or can even go beyond the popularity of their predecessor. This tendency refers to Angular demand in Europe as well. Being among the most popular and loved frameworks in 2017 and due to the successful subsequent releases of Angular 4 and Angular 5 that continue to be popular, it can be expected that this framework will continue to be among the most popular and loved frameworks next year as well.

AngularJS vs Angular 4 vs Angular 2

Angular vs Angular 4 vs Angular 2 developers

The first version of this technology, or what many refer to as Angular 1, was released in 2009 and is officially just called AngularJS. On September 2016, 2nd version was released, and it was a complete re-write of the 1st one. It’s incompatible with the first version and is formally called just Angular. This required Angular developers to undergo a major migration process if they wanted their AngularJS applications to work with Angular 2.

Then, on March 2017, the release of 4th version of this JS technology was announced. To address the confusion with naming schemes, the Angular developers team explained their versioning and releasing convention, where they adopted semantic versioning to standardize their versioning structure. This versioning scheme follows a major.minor.patch versioning number, so that a major release, a minor release, and a patch will increase the major, minor, and patch digits by 1, respectively.

Angula JS vs Angular 4 vs Angular 2 developers

Illustration of Semantic Versioning (Source)

Noticeably, the development team skipped the 3rd release. The reason behind this was that the team wanted to standardize the package versions as well, and since one of the packages in the 2nd version, particularly the router package, was already in version 3.3.0, the team proceeded to version 4 so that all packages could start with version 4 as well.

Amidst all these many versions, let us look into the differences between the two latest versions, Angular 2 and Angular 4.

Editor’s Note: After recent release of the 5th version of the discussed technology, we have updated this post in order to provide a full review of the Angular branch.

Angular 5 as a New Step to the Future

The latest released version from the branch is Angular 5. The change from AngularJS to Angular, was a drastic step, going from Javascript to Typescript-based Javascript framework. Despite this change, a lot of features and functions that made AngularJS great as a framework was still carried over and recoded into the branch. In the release of the 5th version, the following major features have been included:

– Bug fixes for the issues raised with the previous version
– Removal of deprecated functionalities from its predecessor (the 4th version)
– New route lifecycle events and Event Tracking Activation of routes
– Build Optimizer; optimizing build times and build sizes
– Ease of adaptability; transitioning from the 2nd version to succeeding versions

There are a lot more to the newly released 5th version. For more details on what makes Angular 5 developers in Ukraine, the USA, and Europe awesome, check out our Angular 5 blog post.

Angular 2 and 4 developer Artem

Angular 5 vs Angular 4 vs Angular 2 vs AngularJS

Fortunately, 4th version of this JS technology is largely backwards compatible with the 2nd one, meaning Angular 2 applications will run with Angular 4 with minimal, if any, modifications. This is in contrast to Angular 2’s incompatibility with the 1st version. Nevertheless, the latest version of this technology introduced major changes from Angular 2 that merited an increase in the major version number, so if you plan to hire angularjs 2.0 developer, take a look at these differences. To have a better picture on the main differences between the different released versions of this framework, below is a table outlining the main features of all releases:

Angular 1.x/AngularJSAngular 2Angular 4Angular 5
Code generated by compilerLargeLargeSmaller than the 2nd release by up to 60%Smaller than the 4th release, due to the addition of a Build Optimizer; can save up to 95% of the build time
Animation packagesIncluded in core frameworkIncluded in core packageSeparated from core package and may be excludedSeparated from core package
Conditionals*ngIf only*ngIf only*ngIf and elseLarger*ngIf only
TitleCase pipeNot supportedNot supportedSupportedSupported
Angular UniversalUnofficial supportUnofficial supportOfficial supportOfficial support
TypeScript compatibilityNot supportedUp to version 1.8Up to version 2.2 Up to version 5.1
Template source maps Not generatedNot generatedGenerated Generated
ES Modules UnflattenedUnflattenedFlattened Flattened

Comparison of features introduced in the 1st, 2nd, 4th and 5th versions

Below you can also check the main tech differences of 4th and 2nd versions:

Less Code

Angular 4 developers had made major revisions to its compiler so that it generates up to 60% less code compared to that generated in second version. This significantly reduced the file sizes of applications and can result in considerably faster loading times.

Separate Animation Packages

In the 4th version of this technology, animation packages have been separated from the core package and will need to be manually imported if any animation will be used. This means that, if a developer will not be using animations, he can leave these packages out, and the resulting code will be even smaller in size.


Improved Conditionals with *ngIf/else

Angular 4 now allows developers to use an else clause after an if condition, as such:

<div *ngIf="condition; else default">
Content when condition returns true
<ng-template #default>
Content when condition is false

The above code checks the condition and renders a different component depending on the condition’s truth value.

New TitleCase Pipe

In the 4 version a new pipe called titlecase, which capitalizes the first letter of each word in the text contained, was introduced to Angular developers:

<h2>{{ 'This is a sample text' | titlecase }}</h2>

The above code will print This Is A Sample Text with the first letter of every word capitalized.

Angular Universal

With the 4th version, the development team has officially adopted Angular Universal, a project originally developed and maintained by the online developer community, which enabled applications to be rendered on the server-side. Such server-side rendering results in improved performance and better search engine optimization.

Better TypeScript Compatibility

Angular 4 now supports TypeScript 2.1 and 2.2, which introduces increased speeds and better type checking. In contrast, second version of this technology only supports until TypeScript 1.8.

Angular 4 developers for hire Roman

Template Source Maps

With the 4th version, when the application encounters an error that originates from one of the template files, source maps are generated to help developers pinpoint the source of error.

Flat ES Modules

Angular 4 ships with flattened ECMAScript modules, which offer several advantages, including reduction the file sizes of generated bundles, increase in building, transpilation, and browser loading speeds, and helps with JavaScript code clean-up via tree shaking.

You may check the comparison summary on different Angular releases in the infographics below:

demand for AngularJS developers and top facts about AngularJS

How Much Do Angular 2 and 4 Developers Make?

Are you interested to hire AngularJS developers? One of the things that you might want to consider is how much Angular developers make in your country and other countries worldwide. Good source of information on the up-to-date rates of  salaries for AngularJS developers can be found among the numerous job boards available online: Glassdoor,, or Ziprecruiter.

how much do angular developers make worldwideAverage gross salaries of Angular developers

From our research of Angular programmer salary, the picture above or the table below outlines the average salary of Angular developers from various countries around the world. It also shows a comparison of Angular 2 vs AngularJS vs Angular 4 developers salary.

CountryAngular 1 / AngularJS DeveloperAngular / Angular 2 DeveloperAngular / Angular 4 Developer
United States$98,000$104,000$105,000
United Kingdom$94,000$98,000$98,000

Average net salaries of AngularJS, 2 and 4 developers worldwide (Source: ZipRecruiter)

Having compared an AngularJS developer salary in Canada, Europe, Australia, and the USA, it is now evident that Angular 2 and 4 developer rates are the highest in the United States.

Based on the numbers above, you can see that a salary for AngularJS developers is much lower than an  average salary for Angular developers. Also, comparing the rates stated above, it is evident that rates of experts skilled in the 4th version of this framework are a bit higher than an average Angular programmer salary in most countries. It is now evident that salary for AngularJS developers is the lowest than of other experts, but it should be also considered, that the average salary of a programmer depends not only on the location of a programmers, but also on their experience. Senior Angular developer salary is higher due to the experience and skills that they bring with them and this doesn’t depend on the country.

We highly recommend to check the rates of Angular developers in Ukraine as well in case you are looking for ways to build a short-term project with the help of remote developers. Below is the picture with average gross rates of UA programmers:

Angular JS dev salary in Ukraine by experienceAverage gross salaries of Angular developers in Ukraine

From the picture above you can see that salaries of UA devs are quite affordable in comparison with other countries. Moreover, if you decide to cooperate with Ukrainian remote development team, you will get a lot of advantages such as: costs saving and reduction, good geographical location; flexibility in extending or reducing the team any time due to big pool of talents available in Ukraine etc.

Issues with Angular 4

Angular 4 or Angular 2 developers

Although the 4th version of this popular technology offers several improvements over the 2nd one, it is not without problems, and several known issues have been reported by developers. One known issue that has been acknowledged by the Angular developers team is Angular 4’s lack of support for TypeScript 2.0’s strictNullChecks, which does not permit null or undefined values for all data types by default. According to the development team, this issue was intentional so as to avoid breaking applications, and a fix for this issue is on its way.

Many other issues have been reported by developers via GitHub page. Some examples are:

Given that 4th version is a new version that has only been released, such issues are normal and to be expected. These issues should be ironed out as the framework matures.

Reception to Angular 4

Angular JS developers Ruslan

A couple of developers, such as Zhang Yi Jiang and Adrian Gomez Llorente, have expressed some negative opinions on this technology, particularly on Angular 2. Nevertheless, many others see its potential, especially with the newer 4th version.

Web developer Pavel Gerasimov, for instance, tested the 4th version upon release and recommends developers to make the upgrade, saying that “it makes sense to do it now.” Moreover, DZone contributor Arnab Sarkar likes the fact that “Angular 4 has a gentle learning curve” from the 2nd version than going to Angular 2 from Angular 1, but notes that the learning curve from AngularJS vs Angular 4 is still steep. Senior HP UI developer Sachin Calicut also notes that the changes introduced by the 4th version are “good for everyone involved.”

Ruslan B Angular 4 developer for hireRuslan B., remote Angular programmer at Mobilunity: Angular 4 is very similar to 2nd version, again it’s smaller and faster, but provides breaking changes which push you to follow the changes all the time. In current project we use Angular 4, with its help we build an application that accumulates the posts from different social networks and let clients to manage them productively.

hire Angular 2 or Angular 4 developers for your project

Hire Angular 4 or Angular 2 Developers Now

We have presented the main differences between Angular 2 and 4, and we have seen that the 4th version offers many benefits over the 2nd one, although it also currently has a number of issues being reported, something that’s really not surprising for such a new framework. We have seen that Angular 4 developers have some added handy tools to work with, and they may be able to optimize mobile applications more than what was possible with the 2nd version of the framework, but Angular 2 developers shouldn’t have too big of a problem migrating to Angular 4 due to the latter’s backwards compatibility.

Hire Angular 2 vs Angular 4 for your project

Now that you know the differences between Angular 2 & 4 developers, it’s a good time to decide which JS developer you want to hire. Regardless of whether you’re planning to hire an Angular 4 or Angular 2 developer, we’ve got what you need at very affordable rates. We are Mobilunity, a provider of dedicated developers from Ukraine. We not only offer the most talented developers across Europe, but we also offer one of the best rates in the continent. With us, you can be sure to get your money’s full worth.

Samples of CVs of Our Developers

CV #1

AngularJS vs Angular 4 developer for hire

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CV #2

Konstantin S. – Frontend Developer


  • HTML (HTML5), CSS (CSS3), jQuery, JavaScript, XSLT, LESS, Sass, AngularJS/Angular 2/Angular 4, Backbone, Twitter Bootstrap


  • Developing new widgets (using Angular + RequireJS)
  • Full time support of  high load project;
  • Took part in developing front-end, scss architecture, client-side logic;
  • Developing split tests for desktop and mobile versions;
  • Code refactoring and optimization;
  • Responsive design, usability:
  • integrating with server-side code, MVC conception

Technologies:HTML5/CSS3/SASS/JavaScript/jQuery/Ajax/ASP.NET MVC/Razor/GIT /AngularJS + Bootstrap/ LESS. Automation using Gulp, TypeScript; ReactJS; Back-end: SailsJS…

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Angular 2 Developer Sample #3

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hire angularjs or angular 4 developers at Mobilunity at affordable rate

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