Top 100+ JavaScript Development Companies

Our comprehensive list of Best JavaScipt Web Developers is based on extensive research and analysis of each company’s industry experience, proven success, and customer satisfaction. Whether you’re looking for a full-stack JavaScript Web Development team or a specialized consultancy, this list will surely provide you with the perfect match for your project.
Last updated: April 2024

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Buyer's guide

What do JavaScript developers do? 

Many people are fascinated by the idea of becoming a JavaScript developer but don’t really understand what a JavaScript developer does. A JavaScript developer creates interactive web applications and webpages using JavaScript. JavaScript developers are responsible for writing, testing and maintaining code for web applications.

JavaScript developers must deeply understand the JavaScript language and its principles. They must also be able to write efficient and well-designed code. A JavaScript developer should understand the underlying architecture of web applications and how they interact with the browser. Developers should also know best coding practices and ensure each piece of code is written efficiently and effectively.

JavaScript developers must stay up-to-date on new technologies, frameworks and trends in the web industry. They should also keep a pulse on potential future developments and new technologies that may be beneficial for web development.

JavaScript developers put together the code and logic behind web applications. They may be involved in developing the logic and operations of the software they create and should be able to work with a team of developers to create quality software.

JavaScript developers are also expected to debug and troubleshoot any problems that may arise. They should be able to identify the source of bugs and solve any issues that may arise.

Becoming a JavaScript developer is an exciting career with many growth opportunities. If you have good knowledge of the JavaScript language and web technologies, this could be a great career for you. You could become an exceptional JavaScript developer with hard work, dedication, and a well-rounded knowledge base.

What Is A JavaScript Development Company?

JavaScript is one of the most popular programming languages in the world, used for both client-side and server-side software development. In the modern era of web-based application and software development, JavaScript-based development has become more prominent in recent years, allowing developers to rapidly create complex and highly-interactive user interfaces. As such, JavaScript development companies offer various services to organizations seeking to leverage the technology’s power.

At the most basic level, a JavaScript development company is a company that specializes in using JavaScript to develop web-based applications. Most organizations use JavaScript to build custom web solutions, such as websites and web apps. In addition, they may also create applications that run on mobile devices. JavaScript development companies often use modern web technologies, such as HTML5, CSS, and AJAX, and frameworks like jQuery and Underscore.js.

In addition to custom solutions, JavaScript development companies typically provide support for existing applications. This may include maintenance, bug fixing, and user interface or feature enhancements. Companies that provide this support often use Agile development methodologies and the latest debugging technologies.

Many JavaScript development companies also offer additional services, such as design and content creation, user experience optimization, search engine optimization, and testing. Such services enable them to offer customized solutions for their customers’ specific needs. As such, hiring a dedicated JavaScript development company provides organizations with the benefits of both scalability and cost-efficiency.

In conclusion, a JavaScript development company is a specialized organization that leverages the power of the programming language to develop custom web solutions and maintain existing applications. Organizations can benefit from expertise, cost-efficiency, and scalability by hiring such a company.

How many companies use JavaScript?

JavaScript is a popular programming language used by thousands of companies worldwide. It is used in various applications, ranging from client-side scripting in web browsers to server-side programming for web servers and databases, desktop applications, and other uses. Recent research has revealed that more than 90% of websites use JavaScript for some or all of their code, and the language is estimated to be used by over 11 million developers worldwide as of 2022.

The popularity of JavaScript can be attributed to its wide variety of features, such as its platform independence, continuous growth, and high levels of flexibility. Developers are attracted to its easy-to-understand syntax, object-oriented programming capabilities, easy deployment, and scalability. Businesses worldwide adopt JavaScript due to its broad functionality and variety of uses.

The most common and versatile uses of JavaScript include web development, back-end development, mobile app development, cross-platform mobile application development, gaming, data visualization, and artificial intelligence. JavaScript is also used in web-based automation and robotics, helping to automate the process and increase workflow efficiency. Outside the tech industry, JavaScript has been used to create websites for various industries, including media, education, hospitality, manufacturing, and retail.

Despite its flaws, JavaScript continues to remain a popular programming language for businesses all over the world. Companies increasingly rely on the language for their apps and websites as it provides an extensive range of features and functions. For example, front-end applications won’t function properly without JavaScript. Moreover, developers can create web apps and SPA’s with features such as rich client-side interaction, real-time communication, and simplified security.

In conclusion, the popularity of JavaScript among companies of all sizes can be attributed to its versatility across various user scenarios. Developers are well-versed in the language, and businesses can quickly create apps and websites built with JavaScript. The platform has become increasingly valuable to software engineers, helping streamline the development process and automate tasks. As such, JavaScript’s prevalence remains strong among companies today.

How to find the Best JavaScript Development Company? 

  1. Check the company’s portfolio and experience in JavaScript development: Check the past projects they have completed and the clients they have worked with. This will help you determine if the company can meet your requirements.
  2. Research the company’s development methodology: Make sure the company follows a well-defined development process for JavaScript development.
  3. Consider the company’s technology stack: Ensure the company has extensive experience and knowledge of all the latest technologies used for JavaScript development.
  4. Check the company’s client feedback: Research online reviews and ratings to better understand what past clients had to say about the company’s performance.
  5. Check the company’s communication practices: Make sure the company can keep you informed throughout the development process.
  6. Make sure the company is cost-effective: Compare the company’s rates to industry standards to ensure you get value for your money.

Javascript Development Process: Step by Step

Step 1. Gather Requirements. 

Understand the scope of the project and the user’s needs and expectations.

  1. Define Functional Requirements: The first step when gathering requirements in a JavaScript development process is to define functional requirements. The functional requirements provide an overview of the features and capabilities of the project, such as which browser compatibility is needed and what type of user interactions are necessary. This helps to set the scope of the project and the direction of the development. 
  2. Conduct User Research: User research is an important step in gathering requirements. This involves understanding how users interact with the software or product and their needs, needs or abilities. Research can be conducted through interviews, surveys, focus groups, or user feedback captured through usability testing. Identifying user needs, objectives, or needs helps create a better user experience by considering the user’s perspective and understanding of the product or software.
  3. Define Technical Requirements: Technical requirements define and describe the technical components of the product or application that must be met for successful implementation. This includes the various system and software requirements, such as the operating system, hardware, and software requirements, compatibility with different browsers, and the system’s minimum and maximum technical requirements.
  4. Analyze User Personas: A user persona describes an ideal user for the product or application. Analyzing user personas helps to identify key requirements for the product or application. This includes analyzing goals, needs, behaviors, motivations, tasks, and skills and learning about their preferences and attitudes toward the product. 
  5. Create Mockups and Wireframes: Creating design mockups or wireframes is a great way to get an idea of how the product or application should look and function. This helps to identify potential problems or issues that may need to be addressed and provide a base understanding of the user interface design. It also allows developers to get an idea of what the end product should look and feel like. 

Ultimately, these five steps will help ensure that all requirements are properly gathered in the JavaScript development process. It also provides insight into how users interact with the product or application. Gathering requirements upfront will help make the development process smoother while ensuring that the project meets user needs, objectives and expectations.

Step 2. Draft a Design Proposal.

Create a sketch of the overall website flow and look based on the requirements.

Example: This design proposal outlines the steps and processes necessary to successfully develop a JavaScript-based web application. It outlines the details of the user and data flow, the development of the application environment, and the testing protocols for ensuring a successful launch. 


This proposal aims to develop a web application using JavaScript and other web languages with a graphical interface and user experience that is intuitive, highly functional, and visually appealing. 


This project’s scope includes the web application’s development from the beginning of the design process to the initial deployment. All phases of the project, including research and brainstorming, information architecture, user experience design, development and testing, will be performed following best practices.

Technology & Tools: 

This application will use JavaScript, HTML, CSS and other web technologies for development. Specific technologies and tools that will be used include:

  • React, Angular, or Vue – JavaScript frameworks. 
  • Node.js – A JavaScript runtime. 
  • Gulp – A JavaScript-based task runner. 
  • MongoDB – A NoSQL database. 
  • Webpack – A module bundler. 
  • Mongoose – An object data modeling library.
  • Sass – CSS pre-processor. 

Design Process:

The design process will be an iterative process, with multiple rounds of revisions and feedback from stakeholders throughout. Specific steps in the process include:

  • Research & Brainstorming – Identifying user requirements and researching to gather ideas for the application interface. 
  • Information Architecture – Establishing the application’s structure and building wireframes accordingly. 
  • User Experience Design – Combining information architecture, visual design, and usability testing to ensure a user-friendly interface. 
  • Development – Coding the application using the chosen languages and technologies, with validations and testing. 
  • Testing – Implement test plans to ensure the application functions correctly before launch. 

Step 3. Choose a Development Strategy.

Select the appropriate development strategy for the website, such as a framework, library, or a combination of both.

The first step in choosing the right development strategy for a JavaScript development process is to understand the project’s requirements. Before embarking on any project, it is important to assess the customer’s needs and determine the best possible solution. It is also important to consider the platform, user experience, scalability, performance and other complexities that might need to be addressed. Once the requirements are understood, then it is time to choose the right development strategy.

There are several options available for choosing the right development strategy. Some developers use JavaScript frameworks like React, while others use traditional object-oriented methods. Additionally, developers may incorporate server-side languages such as PHP or Ruby on Rails into the development process and libraries and frameworks written in JavaScript.

When choosing development strategies, developers should also take into consideration the team’s skills, development procedures and timeline. Using the right development strategy, the team should be able to produce a successful product in the shortest amount of time possible. The team must be comfortable with the tools and technology they are using and their allotted timeline. Successful products can be launched faster by employing the right development strategy and allowing the team to work within the limitations of their experience and abilities.

Step 4. Develop the User Interface.

Create the page structure and page layout for the web application.

  1. Design the user interface: Before you start building the user interface using JavaScript, you must decide how the user will interact with the application. This includes wireframing, creating a visual design, and exploring user interface elements.
  2. Write the code to create the user interface: Once you have decided on the design and elements of the user interface, you can start writing the code to create the user interface. This will often include HTML and CSS for layout, styling, and structure, as well as JavaScript for events, transitions, and other interactions.
  3. Test the user interface: Once the user interface is built, it’s important to test it to ensure it works as desired. This may involve manually testing it or using various tools and frameworks to automate the process.
  4. Deploy the user interface: Once you’ve tested the user interface, you’ll need to deploy it. This could involve pushing it to production, deploying it to a staging environment, or releasing it as an open-source project.
  5. Monitor and maintain the user interface: The last step is to monitor and maintain the user interface. During this process, you’ll need to address any bug reports, make sure the user interface is up to date, and add new features or updates as the user needs to change.

Step 5. Write and Test Code.

Write the code to provide the functionality to the user interface. Ensure that the code is bug-free, secure, and meets the desired performance requirements.

The process of testing code in JavaScript development can vary depending on the type of development. Generally, it involves the following steps:

  1. Code review: The first step in the testing process is to have another developer review the code. This ensures the code is readable, understandable, and follows any company or specific coding standards.
  2. Unit testing: Unit testing tests individual code functions to ensure that they perform as expected. This is done by creating “unit tests” which are automated scripts that will test different inputs and combinations of code to ensure it behaves as expected.
  3. Integration testing: Integration testing ensures that all the different pieces of code are working together as expected. This is typically done by using “integration tests” which are automated scripts that test different combinations of code inputs to ensure they all produce the expected result.
  4. APIs and web services testing: APIs and web services are an important part of the software development process, so they must be tested to ensure they are working as expected. This can be done by creating “API tests” which are automated scripts that test different API calls and web services to ensure they produce the expected results.
  5. System and user acceptance testing: The final step in testing is to test the system and ensure that it meets the user’s needs. This is done by creating “user acceptance tests” which are automated scripts that test different combinations of inputs and outputs to ensure they meet the user’s requirements.

Step 6. Deploy the Application.

 Deploy the application on a server and provide access to the users.

  • Using docker: Docker is a fantastic tool for deploying applications. When you use docker, you can specify all the dependencies that your application needs and bundle them with the container. The benefit of this is that you can deploy your application quickly and reliably, wherever you need to.
  • Using serverless architecture: Serverless architecture is a great way to deploy an application. Instead of setting up servers or VMs to run your application, you can use services like AWS Lambda or Azure functions to run short-lived processes. This is a great way to keep costs down while delivering the application quickly.
  • Continuous integration and deployment: Continuous integration and deployment is a great way to get your application out quickly and painlessly. You can automatically deploy your application every time code is pushed to a repo by setting up a continuous integration pipeline. This means that you don’t need to worry about setting up servers and can deploy your application as soon as it is ready.
  • Static site hosting: If you only need to host a simple static website, then using a service like Netlify or GitHub Pages is great. These services are fast and easy to set up and can be used to host simple websites with no server-side code.
  • Cloud hosting: Cloud hosting is the best option for applications that require more power and flexibility. By using cloud hosting, you can get the scalability you need while still getting the same level of reliability and support that you’d get when running your application on your servers.

Step 7. Monitor Results and Make Improvements.

Monitor user engagement and feedback on the website and make necessary improvements and fixes.

  1. Automated Unit Testing: Automated unit testing is a method of examining and validating the source code that applies input and then verifies the output correctly matches the expected result.
  2. Early Access for Customers: Giving customers early access to unreleased product versions can help developers to discover any glitches at the early stages of development and ensure the best result when the product goes on sale.
  3. Freelancer Reviews: Reviews from users, clients, and freelancers can help developers to finetune the development process at each iteration, and they may offer quick and valuable feedback.
  4. Performance Tracker: Performance trackers can measure the response time of a product development process and whether the performance is meeting the expected targets.
  5. Bug Tracking System: A bug tracking system is where developers note any bugs they find while coding. With a bug-tracking system, developers can keep track of their development progress and immediately fix the identified issues.
  6. Continuous Integration: Continuous integration automatically builds and tests computer software with each commit to a version control repository. This will help developers to identify any issues with the code before it is released publicly. 
  7. Monitoring Performance with Analytics: Performance analytics provide data-driven insights into an application’s performance so that developers can identify any areas of improvement and correct them before releasing the application.

How much do Javascript Development Companies charge? 

Javascript Development Companies typically charge per hour or project. Rates vary widely depending on the project’s size and complexity, the javascript developer’s experience, and the development firm’s location.

On average, you can expect to pay between $50 and $150 per hour for Javascript development services. Some higher-end firms may even charge more than $200 per hour. This hourly rate differs from most software developers’ rates, who typically charge anywhere between $90 and $150 per hour.

Regarding project-based pricing, it is common for Javascript Development Companies to charge between $2,000 and $10,000 per project. Again, these numbers can vary greatly depending on the size and complexity of the project.

When deciding what Javascript Development Company to use, it is important to compare different companies to ensure you get the best value for your money.

6 Factors affecting the Cost of Javascript Development 

Factor 1. The complexity of the Project: The project’s complexity can greatly affect the cost of JavaScript development. A more complex project may require a larger development team and additional resources, increasing the cost.

Factor 2. Level of Expertise: The level of expertise the developer or development team has in the specific JavaScript technologies they are using will also impact the cost. More experienced developers are likely to cost more but may also be better equipped to handle more complicated tasks.

Factor 3. Third-Party Costs: The cost of using third-party libraries, APIs, or frameworks may also contribute to the final cost. 

Factor 4. Platforms and Browsers: The platforms and browsers the application has to be compatible with will also affect the development cost. Apps for multiple platforms or browsers may require additional work and resources, increasing costs.

Factor 5. Deadline: Projects with shorter deadlines may require additional overhead and resources, resulting in higher costs.

Factor 6. Maintenance and Support: Maintenance and support after the project is completed will also add to the final cost. This could include bug fixes, security patches, or feature updates.

Eight useful Tips to Hire a Javascript Development Company

Tip 1. Check expertise - It is the most important factor when hiring a development company. You should ensure that the company you are considering has extensive experience developing solutions with Javascript and other programming languages.

Tip 2. Ask for proof of work - You should ask the current or previous clients of the company for proof of work. This can be in the form of a portfolio or references.

Tip 3. Ensure security - Ensure that the development company you are considering specializes in writing secure code. Ask for proof that their solutions are secure and up to industry standards.

Tip 4. Select the right team size- Depending on your project size, and you may need a larger or smaller team. A large team might not be a cost-effective solution for a small project.

Tip 5. Ask about the development process - A development company should have a well-defined project process that they should be willing to explain to you in detail. This will help you understand their methodologies and approach.

Tip 6. Look for flexible solutions - The development company should be willing to provide options and adjustments to fit your organization’s budget and development requirements.

Tip 7. See if the company offers service after deployment - The development company should be available to offer support and troubleshooting services after the application has been deployed and launched.

Tip 8. Compare quotes - Before making a decision, compare quotes from several different Javascript development companies to ensure that you get the best value for your money.

How do can help you to find Top Javascript Developers? brings you the best resources and reviews of the leading JavaScript developers available over the internet. We thoroughly research every provider and identify the best developers in the industry according to their expertise and experience. 

We believe in providing comprehensive information about the developers to the users so that one can make the best decision on hiring their ideal JavaScript developer. TechReviewer consolidates ratings and reviews from multiple websites, forums and marketplaces to provide a 360-degree analysis. 

The reviews provided here are from reliable sources, and we strive to keep them as unbiased and relevant as possible. We continuously make efforts to keep the list updated and current. Furthermore, for added convenience, we make it super easy for users to filter developers according to their skillsets, experience and availability. helps you find each developer’s rank, compare different developers and select the best JavaScript developer to suit your project needs. With us, evaluating the developer’s skill sets and abilities becomes an effortless task.

18 Questions to Ask When Hiring Javascript Development Firms

  1. What is your experience with developing projects in JavaScript?
  2. Do you have specific teams dedicated to developing JavaScript apps for a certain platform?
  3. What is your development methodology?
  4. Do you provide test cases and bug fixes?
  5. What libraries do you prefer, and how do you use them in your development processes?
  6. Do you offer continuous integration and testing?
  7. How do you ensure application scalability?
  8. How do you structure and organize the code base of large-scale projects?
  9. What kinds of security measures do you use for application development?
  10. Do you use any interactive techniques in the development process?
  11. Can you provide any reports of success or failure?
  12. How do you reach code optimization?
  13. Do you have any experience developing progressive web apps?
  14. What additional services do you offer, such as maintenance and long-term support?
  15. What techniques do you use for debugging and troubleshooting?
  16. How much experience do you have with creating and managing APIs?
  17. What performance optimization techniques do you implement?
  18. What technologies do you use to build web applications?


How long does a Javascript Development Company take to build a website?

The time it takes to build a website using JavaScript development services can vary greatly depending on the complexity of the project and the resources available. Generally speaking, a small website can be built in one to two weeks, while a more complex project may take months or even years. Key factors that impact duration include the size of the website, the number of features and its interactivity. Using a professional JavaScript development company can help reduce the timeline, as they have a wealth of experience and knowledge at their disposal.

What are the different development services offered by a Javascript Development Company?

  1. User Interface (UI) Development: A Javascript development company can help create web or mobile applications with an interactive, user-friendly interface. This includes creating a user interface for web or mobile applications with HTML and CSS or using frameworks such as React.js or Angular.js.
  2. App Development: JavaScript development companies can help create applications for web or mobile in different languages. For example, a JavaScript developer can help build a Node.js web application or a mobile application for Android or iOS using React Native.
  3. API Development: API (Application Programming Interface) development is about building an interface between web or mobile applications. A javascript development company can help build APIs with technologies such as Express.js, enabling developers to access data and functionality from external sources.
  4. Web Development: A JavaScript development company can help create web applications with technologies such as React, Node.js, and Angular. This includes creating custom web solutions and interactive features such as dynamic menus, image galleries, and forms.
  5. Database Management: A JavaScript development company can also help manage databases. For example, they can use technologies such as MongoDB or MySQL to store, manipulate, and query data.
  6. DevOps Services: A JavaScript development company can offer various DevOps services, such as deploying applications to cloud platforms, setting up continuous integration and delivery, and automating certain tasks.

How do I Hire the Top Javascript Website Developers?

  1. Ask for referrals from colleagues and friends: Ask for recommendations from people who have worked with developers or know about the industry. This can give you good insights into the top website developers you should look for.
  2. Carry out thorough background checks on potential candidates: Research background information about the potential candidates and check written references, online reviews and ratings, qualifications and certifications.
  3. Look for websites they have built in the past: Ask to see any websites they have built before, or look up the websites they have built in a search engine. This will give you an idea of the websites they typically create.
  4. Check their portfolios and interview them: Take a look through their portfolios to get an idea of the types of websites they have built before. Afterward, interview them and ask questions to better understand their skills and experience.
  5. Check out reviews and ratings of their services: Read reviews and ratings of their services to evaluate the quality of their work. This will also provide valuable feedback from customers who have used the services of the website developer.
  6. Research their involvement in the Javascript community: It is crucial to find out if the website developer is an active member of the Javascript community, as this will indicate their commitment to staying up to date with the latest technologies.
  7. Ask relevant questions to determine the level of skill and knowledge: Interview the developer to assess their understanding of Javascript and the web development process. Ask relevant questions about the types of projects they have tackled in the past, what development tools they use, and how they debug issues.
  8. Check the duration of the projects they have been involved in: Ask the website developer about the duration of the projects they have been engaged in to get an idea of their ability to work to deadlines and within timelines.
  9. Create an effective job description that focuses on the need: Put together an effective job description that outlines the scope of the job and the experience you expect from the website developer.
  10. Work with an experienced team of developers to get the best results: You may find that working with a professional team of website developers can provide you with the most comprehensive and best results for your project. This is because each developer will bring their strengths and skills to the project, enabling the whole team to work together to build the best website.

What Qualities Should a Javascript Website Development Company have?

  • Expertise: A good Javascript website development company should have a team of highly skilled and experienced developers who are familiar with the latest trends and technologies.
  • Communication: To ensure the development process is successful, the development company must communicate effectively and promptly handle customer inquiries.
  • Creativity: A Javascript website development company needs to think outside the box and develop creative solutions that suit the client’s needs in the best possible way.
  • Flexibility: A company should be able to offer flexible solutions and customizations according to the customer’s requirements.
  • Compatibility: The development company should create a website compatible with multiple browsers and devices.
  • Quality: Good Javascript website developers prioritize the quality of their work above everything else and focus on the tiniest details to deliver the best results.