Unlock Your Project's Potential with Our Expert React Developers Team

Full Stack Ninjas is the premier choice for React.js development services in the USA, offering a team of over 100 experienced developers located all across America and Latin America to meet even the most demanding project requirements. Hire by hour - it's easy.

“With advanced React.js expertise and the capacity to quickly solve complex issues, Full Stack Ninjas consistently works at the forefront of technology - pushing boundaries with every project they take on!”


Kenny Johnston, Director of Technology, Gemini Legal

Our Team of Expert React.js Developers

Clients can be certain of the value, safety, and affordability of their projects due to our energetic crew made up of project managers and lead technicians from the USA/Canada, and experienced Senior Developers from Latin America.

  • Developer Name

    Senior Software Engineer

    Latin America 23 Years of Experience

    Senior Software Engineer

  • Developer Name

    Senior Software Engineer

    Latin America 21 Years of Experience

    My journey to become a developer was driven by my passion for exploring the inner workings of computers and pushing their limits. After honing my technical skills on hardware, I moved onto software development – allowing me to gain an all-rounded insight into this fascinating field.

  • Developer Name

    Senior Software Engineer

    Latin America 19 Years of Experience

    As a Full Stack Ninjas developer, I create excellent applications that utilize the full potential of technologies such as React and Node.js to fulfill our clients' needs while ensuring top-notch quality code.

  • Developer Name

    Latin America 18 Years of Experience

    As the CIO of Full Stack Ninjas, I am accountable for supervising and adding to our most important customer projects. I have considerable expertise in constructing intricate custom software and managing development teams, with 15 years of experience in the field.

Client Testimonials

  • Full Stack Ninjas' proficiency with React.js and expertise in best practices allowed us to dramatically improve performance for our AR department, reducing labor by an impressive 50%. Their capability has revolutionized our automated processes and provided a great use of resources, propelling the team towards higher levels of productivity.

    KENNY JOHNSTON -

    DIRECTOR OF TECHNOLOGY, GEMINI LEGAL

  • Working with you has been a true pleasure. You have not only met our expectations when it comes to punctuality and deadlines but also gone the extra mile in understanding our business processes - that's remarkable! We are delighted by your commitment and expertise. Five stars for sure!

    GEORGE GRANT -

    DIRECTOR OF IT, THE CODING NETWORK

  • Working with the talented Full Stack Ninjas team (Gisselle & Charly) was a true highlight in my 70+ years of development - an experience that will be remembered and cherished for many more to come.

    BILL ESTBERG -

    PRESIDENT, CHILL-N-GO

How to Hire React Developers Through Full Stack Ninjas

1. Talk to us!

We will work together with you to gain an in-depth knowledge of your technical specifications, team operations, and goals to ensure that we provide the ideal solution for success.

2. Meet our available talent

We have FullStack React developers available who will be able to meet your project needs. By looking at their profile, you can get a clear overview of their work history and coding skills. The technical summary offers even more details, such as a video assessment that lasts for an hour, as well as information from our interviews with the developers.

3. 14 Day Risk-free trial

Begin the collaboration. Test your React developers to make sure they are the ideal fit for you and your group!

Advantages of Working With FullStack's React.js Developers

Partnership Approach

Our dedicated and skilled team of over 90 React.js developers provides an invaluable resource for your own in-house developer, allowing them to leverage the institutional knowledge from dozens of senior specialists when faced with a challenging problem.

Proven Process

Our diligent management process has enabled us to keep track of our developers' progress and ensure that every hour billed is accounted for. By doing so, we can better measure the effectiveness of each developer's efforts.

Daily Reporting

Stay on top of your billing with daily reports that provide the latest details regarding billed hours and a description of tasks completed. Get an easy-to-read overview to track progress throughout each month or year.

Flexible Engagements

Transform your web development team into an agile, dynamic unit with React developers standing by. You'll never be overstaffed or under-resourced - just pay for the hours you use and scale as needed!

We Eat, Breathe, and Sleep React.js

Our team is highly skilled in React.js and other javascript frameworks, so you can confidently enlist the help of true experts who will quickly become an integral part of your project's success!

No Freelancers, Subcontractors, or Outsourcing

Hiring full-time freelancers is a legal risk that you don't want to take. At Full Stack Ninjas, we mitigate this issue completely by only employing 100% of our developers as in-house employees, so it's one less thing for you to worry about!

Engagement Models for React.js Projects

New React.js Apps

We create React.js applications of all varieties and sizes, utilizing Python, Node, or Ruby on Rails technology as the backend.

Existing React.js Apps

Do you have an existing React.js application? We are here to provide assistance. We are able to provide debugging, maintenance, feature development, and DevOps services, and will create a personalized plan to suit your requirements.

React.js Team Augmentation

Do you require more React.js developers to join your current team? We can incorporate as many React developers as you need, in order to hasten the process and upgrade the abilities of your team.

Full Stack Ninjas is Proudly Remote

Our team of amazing individuals is constantly expanding and is located in various nations.

Our Clients Are Satisfied With Us, and We Are Sure You Will Be As Well.

Helping patients learn to walk again.

Ekso is the foremost producer of powered human exoskeletons, primarily designed to help paraplegics augment their strength, mobility, and stamina. During the last four years, Full Stack Ninjas has been instrumental in aiding Ekso in creating, developing, and sustaining Ekso Pulse, the main software interface and reporting tool for their exoskeletons.

Full Stack Ninjas is well-equipped with the most up-to-date technologies, including Babel, AWS S3, React.js, Ruby on Rails, and Python. Their developers are efficient and productive, offering great value for money. Furthermore, their services are time-saving, making them a cost-effective choice.

Mark Fiedler, Senior Firmware Engineer

Let's Talk

We’d love to learn more about your project.

Engagements start at $75,000.

How to Hire React.js Developers: A Practical Guide for Non-technical Professionals

React.js is quickly becoming a popular choice for modern, single-page web applications, as developers enjoy its component hierarchy, data flow structure, and incorporation of the ES spec. Additionally, the fact that it is supported by Facebook is an added bonus.

When determining which React.js developer or consultancy to choose for your project, it is important to take into account various criteria such as experience, proficiency, reliability, and price. This process can be lengthy, as one must examine how the chosen developer compares to their competitors.

At Full Stack Ninjas, we understand the difficulty and significance of the process of finding the best React.js developer. This document is intended to provide you with our combined knowledge to help you select the optimal developer or software consultancy to build your React.js application. We hope this guide will be beneficial in your search.

Do I Hire a Freelance React.js Developer, or a Small / Medium / Large React.js Consultancy?

Deciding whether to employ a freelance developer or a consultancy, as well as selecting the size of the consultancy, are decisions of great magnitude that can have a massive effect on the expense, quality, and success of the project. There are countless possibilities, with a broad range of costs and abilities. To get the best results at the lowest cost, numerous elements must be taken into account.

Instead of engaging a freelancer or independent React.js developer, there are certain advantages to hiring a React.js development consultancy. A reputable firm will have a demonstrable history of successful projects, making them more dependable than a single freelancer. Moreover, they are likely to have a system in place to ensure success, and their developers will be exclusively assigned to your project, unlike a freelancer who might be attempting to juggle multiple jobs. However, the size of the consultancy can greatly affect the price, speed and efficiency of the project.

Large React.js Consultancy

Companies with more than 100 employees typically have a vast selection of developers to work on a project, but they tend to have higher fees than smaller consultancies. Projects in this category usually start at $250,000 and the hourly rate is anywhere from $150 to $300+. Furthermore, it may be difficult to receive the same level of personal attention from a larger consultancy as from a smaller or medium-sized one

Small React.js Consultancy

Working with small React.js consultancies can be more affordable than bigger ones and may be more reactive due to fewer clients and staff. However, they may not be able to take on bigger projects, and there may be doubts about their financial stability or the range of experts they have for the job (for example, designers, project managers, quality assurance experts, technical architects, and development operations).h smaller React.js consultancies can present certain advantages, but they may also bring up some worries.

Medium-Size React.js Consultancy

A "mid-market" React.js consultancy of medium size can provide many of the advantages of both large and small consultancies, while minimizing the potential risks. A medium-sized consultancy, typically with 25-100 employees, is seen as the ideal choice as it offers the advantages of both a smaller consultancy (such as cost savings and quick responses) and a larger one (such as resources and stability).

Freelance React.js Developer

Hiring a freelance React.js developer can be beneficial in terms of cost and communication, but they may not have the expertise to complete the entire project. They may be proficient in front-end development, but lack experience in design, project management, back-end development, and development operations. Additionally, working with a freelancer can be a risk, as you're dealing with an individual and not a company. We have had clients in the past who have been negatively impacted when the freelancer they hired did not do the job correctly, failed to deliver on time or at all, vanished during the project, or stole the code.

How Do I Confirm the Developer’s Reputation and Competence?

Once you have selected the type of React.js developer you wish to employ, the next step is to assess their credibility and proficiency. An easy way to begin is to do an internet search and read reviews and feedback from past customers. Here are a few websites you may want to look at:

Yelp

Yelp can be a great source of feedback from a React.js developer's past customers, both positive and negative. While Yelp is usually used by consumers, some B2B companies do have Yelp profiles, so it is worth looking into.

As an example, here’s Full Stack’s Yelp reviews.

Clutch

Clutch is a review website for B2B consultancies that specialize in software development, graphic design, marketing, PR, and other professional services. The reviews on the site are very detailed, but since the consultancies select the clients to provide the reviews, there is a selection bias that leads to most reviews being five stars. Clutch contacts the clients and interviews them in order to write up the review.

As an example, here’s Full Stack’s Clutch reviews.

Google+

In the last few years, Google has made it possible to see large summaries of Google+ pages and their associated reviews when searching. This has caused many companies to encourage customers to leave reviews on their Google+ page, making it a useful resource for finding trustworthy service providers.

As an example, here’s Full Stack’s Google+ reviews.

Better Business Bureau

The Better Business Bureau may not be as reliable as it used to be, but it is still worth checking out to make sure there are no unresolved complaints or unhappy clients associated with your prospective developer. It is possible to find negative reviews or open issues on the BBB website, so it is worth taking a look.

As an example, here’s Full Stack’s BBB reviews.

Ripoff Report

Ripoff Report provides a platform for users to share their experiences of being taken advantage of by a business. It is a quick and simple way to check if the business you are considering has a history of scamming people. However, it is important to note that the allegations may not always be accurate, so caution should be exercised.

www.ripoffreport.com

Good Firms

GoodFirms is a platform that is tailored to evaluate software development consultancies, offering comprehensive details such as customer data, cost, services, and feedback.

As an example, here’s Full Stack’s GoodFirms reviews.

Upwork

Upwork offers reviews for freelancers, but they also have a section for agencies that have customer reviews, although there are not many consultancies on the platform.

www.upwork.com

Glassdoor

Current and former employees can provide valuable insight into the internal culture of a company through reviews compiled by Glassdoor, which can help to identify what the company is doing well and what needs to be improved.

As an example, here’s Full Stack’s GlassDoor reviews.

What Experience Counts?

After verifying their online standing, it is advisable to request samples of their prior work and make sure they have experience with React.js.

When assessing React.js developers, it is important to look beyond their website and actually use their apps. Evaluate the UI / UX, how enjoyable the app is to use, its intuitiveness, its visual appeal, and its modernity.

Once you are pleased with the appearance and feel, it is time to inspect the inner workings and verify the code quality. There are a few methods to do this. The initial step is to request the programmer to provide you access to the code repository through GitHub or BitBucket. If you have a technical individual on your staff, you can have them evaluate the code and make sure it meets industry standards. Is the code neat and understandable? Is there enough documentation? Is it easy to maintain? Is there enough testing? Is it too complicated?

If you don't have a tech-savvy individual in your staff to do an assessment, you can employ a specialist to do a code review for you by the hour.

Finally, contact the client for whom the app was created and inquire about their experience working with the developer/consultancy. Ask specific questions about their experience. Did the developer meet their expectations? Was the project completed on schedule and within the budget? If not, was the developer open about needing more time and resources? Were they open and communicative? Is there anything they would have liked the developer to do differently? Have they recommended the developer to anyone else?

If someone is hesitant to provide references, it's a warning sign. At Full Stack Ninjas, we make it easy to check our references by making them publicly available on our website.

Project Management

At this point, you have made up your mind about either hiring a freelance React.js developer or a React.js consultancy of any size. You have gone through their online reputation, checked out and used the React.js apps they have created, and looked over their code. You have also talked to a reference. As a last step, you need to comprehend their project management process and determine which professionals will be assigned to your project.

When it comes to project management, the initial inquiry should be what kind of project management system the developer or consultant employs. Generally, developers will use either Agile or Waterfall. Agile is often seen as a more adjustable, adjustable, and user-friendly approach while Waterfall can lead to less efficiency due to its linear nature, which can make it hard to address issues that arise in areas that were thought to be finished. Therefore, we usually suggest and follow an Agile approach.

Find out what kind of project management software the company uses, such as Jira, Trello, or Pivotal Tracker. Make sure you will have access to the software so you can monitor the progress of the project. If they don't use project management software, this should be a warning sign.

What is the timeline for the project? Are there any milestones that need to be met? When is the expected completion date? Do they use sprints and, if so, what is the duration of each sprint and how will progress be monitored? Are there daily standups and is it possible to attend these?

Confirm who will be working on your project and their roles. If you're hiring a freelancer, this is straightforward. But if you're hiring a consultancy, make sure to check who will be on your team - project manager, quality assurance professionals, business analyst, backend developer - and what their names and titles are. Also, ascertain how much experience each of them has. Are they experienced professionals with a track record of successful projects, or are they junior developers/recent college grads? Additionally, ensure that the consultancy won't outsource the work to another company - you don't want to pay a high price in the US and find out the work was sent overseas to save costs.

Conclusion

In order to guarantee the success of your project, you must make sure to hire the right React.js freelance developer or consultancy. You can do this by assessing their online standing, looking at applications they have created in the past, examining their React.js code, conversing with former customers, learning about their project management approach, and getting to know the people who will be working on your project. By doing these things, you can be confident that you have made the right decision and give your project the best chance of success.

How to Hire React.js Developers: A Practical Guide for Non-technical Professional

Full Stack Ninjas is a renowned group of React.js experts, engineers, coders, and architects who have been chosen by Uber, Siemens, and many other firms for their crucial software development projects. If you are looking to utilize React.js to build your project, here are some React.js Interview Questions you can use to assess potential React.js candidates:

  • Hooks enable you to access React state and lifecycle features without utilizing a class.

    Classes are not effective for using hooks

    React provides some predefined hooks such as useState and useEffect to achieve this.

  • Multiple answers:

    Simpler than classes

    More reusable than classes

    Promote creating smaller components

    Because of smaller size, on average, they are easier to test

  • Only Call Hooks at the Top Level

    - Don’t call Hooks inside loops, conditions, or nested functions.

    Only Call Hooks from React Functions

    - Don’t call Hooks from regular JavaScript functions

  • Something like this:

    function ScrollView({row}) {

    const [isScrollingDown, setIsScrollingDown] = useState(false);

    const [prevRow, setPrevRow] = useState(null);

    if (row !== prevRow) {

    /* Row changed since last render. Update isScrollingDown.*/‍

    setIsScrollingDown(prevRow !== null && row > prevRow); setPrevRow(row);

    }

    return `Scrolling down: ${isScrollingDown}`;

    Check if the value of the state stored in the component using `useState` is different from the current state.

  • Use React.memo to wrap a function component and shallowly compare its props; this is the same as a PureComponent, but only compares props.

  • Data can be transmitted through the component tree without having to manually pass props at each level, thanks to context.

    It eliminates the need to pass a prop from a parent component to a deeply nested component, which would otherwise require it to be passed through each of the components in between.

  • On the component where the Provider is used

  • A controlled component is one where React is the sole source of truth for the form data, while an uncontrolled component is one where the DOM is responsible for managing the form data instead of the React component.

  • Redux is beneficial when components need direct access to data, when there is a complex component tree structure with props being passed down multiple layers, when data needs to be cached between views, or when the app is large and requires a lot of data to be managed.

  • Lots of options:

    Integrating with third party libraries that don’t use react for accessing the dom

  • Something like this

    const [error, setError] = useState(null);

    const [isLoaded, setIsLoaded] = useState(false);

    const [items, setItems] = useState([]);

    useEffect(() => {

    fetch("https://api.example.com/items")

    .then(res => res.json())

    .then(

    (result) => {

    setIsLoaded(true);

    setItems(result.items);

    },

    (error) => {

    setIsLoaded(true);

    setError(error);

    }

    )

    }, [])

    They create a state value for loading and error, and set them depending on the outcome of the fetch or ajax request.

  • They should mention React Portals somewhere

  • React Portals make it possible to have a component in a deeply nested structure, so you can take advantage of component-level state.

    If the component is a global pop over, such as a global error model or snackbar, then React Context or Redux can be used to store the state that determines when the component should be displayed and activated.

  • A shallow render does not include all of the nested components.

  • Open ended:

    formik

    redux-form

    React-forms

    By hand, but with validations or a specific methodology they follow