Hire Only Senior React.js Developers

Trio focuses on finding the best React Developers to deliver impact within your team. All of our developers are proven domain experts in their field. Companies choose Trio to scale their teams faster with best-in-class talent.

Trusted by great folks at

Why

How

What

Why Companies Choose Trio

Only Seniors

100%

All Trio React Developers are senior-level with proven experience.

Speed

7 days

to fill most roles, sometimes within 3 days.

Time Saved 

50+ hours

of time saved sourcing and interviewing candidates.

Retention

98%

Our engineers stay on teams for 2+ years on average

Criteria Trio Internal Hiring Marketplace
1 Time to find a senior React developer 0-3 weeks 1-4 Months 1-4 Months
2 Recruiting Fee None 15%-40% None
3 Quality Guarantee Yes No No
4 Failure Rate Very Low Low Very High
5 Pre-Screened Candidates Yes No No
6 Deep Technical Validation Yes No No
7 Termination Costs None Very high None

How does Trio work?

1

Tell us what kind of Developer you need

A Trio Partner Experience Manager will work closely with you to understand your technical needs and gather detailed information about your current team and

2

Work with hand-picked talent

Once our team has identified strong candidates that fit your team based on the details we gathered, we’ll present a list of senior ReactJS developer profiles for your project.

Trio developer profiles are extremely detailed and transparent in order to save you time evaluating candidates. You’ll still be able to screen candidates before hiring if you wish.

3

Guaranteed excellence

As soon you review and sign off on a senior React developer, our team will work with you to onboard and manage them for the duration of their tenure.

Our team is committed to delivering excellence as a plug-and-play engineering department that provides long-term stability and generates a positive impact to our partners.

What is Trio?

Only senior developers that deliver impact

Trio provides only the best senior React developers in Latin America across the most popular and stable web technologies. We focus on building processes that allow us to source, identify and manage senior developers that integrate and deliver real impact to your company.

Fully integrated, fully committed

Unlike freelance developers who do not feel the need to be committed to a team beyond their tasks, Trio’s senior React developers integrate on a full-time basis and are dedicated to working with your team for the long haul. They collaborate in meaningful ways and understand how their work ties into the big picture.

Get more done with experienced developers

Our core strength lies in our ability to enhance your current teams with senior developers who have the experience and capabilities to drive your roadmap forward in a way that less experienced developers simply cannot do.

Time-zone-aligned

Trio operates primarily in Latin America which shares favorable time-zone alignments across the entire United States. You’ll be able to collaborate easier with senior React developers that are available when you are, and eager to work with you remotely.

Frequently Asked Questions

Trio’s Top-Tier react developers are the highest caliber talent you will find in Latin America. They are experienced professionals who can understand your business goals and product needs and offer long-term stability to your project.

Trio provides Top-Tier React developers with the resources and training they need to continuously improve their skills over time and manage their long-term career growth.

The short answer is yes. However, realistically you will need to plan to onboard engineers effectively so we highly recommend that engineers start the week after accepting a Trio engineer in order to start fresh at the top of the week.

Our experts will support you through the entire process and learn your onboarding processes to better assist you and save time.

Trio’s process is rooted in years of experience scaling and managing high-performance engineering teams. Understanding your requirements is key for us to be able to provide the right Top-Tier React developer for your team based on your current team structure and processes.

Our interview process ensures that we identify signals that align with your individual requirements and present experienced candidates with an extreme level of detail and transparency.

Trio’s process is rooted in years of experience scaling and managing high-performance engineering teams. Understanding your requirements is key for us to be able to provide the right Top-Tier React developer for your team based on your current team structure and processes.

Our interview process ensures that we identify signals that align with your individual requirements and present experienced candidates with an extreme level of detail and transparency.

Working with Trio, communication is the most important value when working with our partners to make sure they are getting the value they are looking for.

You’ll have access to the best Top-Tier React developers in Latin America along with some of the brightest and most passionate engineering managers to guarantee that every developer allocated to your team is happy, healthy, and exceeding your expectations.

Every Top-Tier React developer is paired with an engineering manager at no cost to you who is responsible for ensuring that their needs as well as yours are met within the context of week-to-week engineering initiatives.

These managers are not meant to replace your project or engineering managers but instead support them so they can focus on what matters most for your team, delivering new features on time.

You should look for Top-Tier React developers who have an advanced understanding of the React library, its ecosystem, and its best practices.

A Top-Tier React developer should possess a solid understanding of core concepts such as state management, component lifecycle, and the virtual DOM. They should also have experience with popular libraries and frameworks e.g Redux/Zustand, GraphQL, and Next.js.

Also, and be able to write clean, modular, and reusable components. Excellent problem-solving skills are a must along with strong attention to detail when working with designs.

The level of quality that Trio brings to our team is unmatched. We've worked with lots of different technology vendors, and no one else has been able to provide the same quality of work, while also working within our startup budget, that Trio has.

Brianna Socci

Co-Founder & COO of UBERDOC

Trio understands modern engineering which allows them to find high-quality individuals seeking opportunities to challenge themselves and develop new skills. Their engineers have the highest potential and have surpassed our expectations when taking the chance on them.

Brandon Chinn

Sr. Director of Product Engineering @ Tally

Trio is able to match us with the exact front-end and back-end developers we need. There's never been something we wanted that Trio wasn't able to deliver via their team. Their communication is excellent. They're prompt, clear, and highly available.

Meridith Harold

Founder & CEO of The Informed SLP

Trio's team has been outstanding when communicating with our team. We've worked with several of Trio's developers and each one was closely involved in all operations of our business, beyond just technological development.

Alec Harrison

Co-Founder of Visual Boston

Simple and easy. Always made themselves available. When questions would arise, documented options would be presented with pros and cons of each option. Made it very easy to work through issues.

Brian Kludas

VP of Client Success @ Axiom Sales Kinetics

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Portrait of a man with tattoos on his neck and arms, wearing glasses, and a blue t-shirt.

Sérgio

Senior React Developer

9 years of experience

Sérgio has been a software developer for the past 7 years, specializing in building web applications using Javascript and React. In addition, he possesses experience in developing APIs and mobile apps. His professional experience encompasses working with startups, agencies, and as a consultant. Sérgio is a team player and an effective communicator. He is self-taught, driven by challenges, and always keen to expand his knowledge.

Expertise

React

JavaScript

HTML

Node.js

CSS

How to find and hire the best senior ReactJS developers for your team

ReactJS, is the hottest front-end library right now, with over ten-thousand companies using it. Whether you are building an MVP for a new product, updating a legacy codebase, or scaling your current front-end team, hiring a great senior ReactJS developer is not as easy as it may seem. 

If you’re looking to hire senior ReactJS developers, this guide is going to give you what you need to know about hiring the right way. 

Alternatively, if you’d like to supercharge your hiring process and find senior ReactJS developers that deliver a positive impact to your team and project, consider working with a trusted tech partner such as Trio.

ReactJS quick facts

Why ReactJS is so popular

React’s easy learning curve allowed it to be embraced quickly by the open-source community beyond Facebook, where it was originally invented and introduced. 

Roles and responsibilities of a senior ReactJS developer

Senior ReactJS developers are front-end JavaScript developers responsible for creating and maintaining UIs for web apps and websites. Front-end development describes software development that affects what the user sees and interacts with.  

On the more technical side, senior ReactJS developers have the knowledge and expertise to handle complex front-end challenges and come up with production-grade solutions.

When it comes to soft skills, senior ReactJs developers should be ready to mentor their mid-level teammates while balancing their day-to-day work. They are expected to be strong communicators as well as thoughtful and consistent collaborators.

The first step in how to hire a senior ReactJS developer is making sure your potential hires have a proficient grasp of React’s deeper technical gotchas and what’s required of them for front-end development in general. 

The day-to-day activities of a senior ReactJS developer can be quite diverse. Here’s a snippet of what you might expect.

The 2020 State of JavaScript Survey shows that React places highly for both usage and satisfaction. 

Skills to look for in a senior ReactJS developer

To hire the best senior ReactJS developers, you’ll need to evaluate them for various front-end-specific skills.

Attention to detail

There’s nothing more frustrating than a front-end developer who can’t translate a design into a pixel-perfect user interface. No matter how well the front end is built, if it just doesn’t look good, you can guarantee that you will drive away users. You’ll want to look for developers who take pride in building interfaces that honor the craft and detail designers put into the UI. Components are designed at the proper ratios and micro-interactions are discussed and developed with care. 

State management using Redux and Hooks

Developers must know how to build dynamic user interfaces that respond to interaction and facilitate proper data flow between components. This is done primarily through the use of Hooks and Redux. Regardless of the approach, it’s crucial to understand state management in order to build scalable React JS applications. 

Familiarity with Node.js 

Knowledge of Node.js is not required for senior ReactJS developers however it’s good to have some familiarity with Node.js to improve load times through server-side rendering and build more robust React.js applications.

Proficiency in ES6 

While senior ReactJS developers should already know JavaScript and even TypeScript, they most certainly should be comfortable with ES6, specifically using high-order functions and making use of destructuring to write cleaner and clearer code.

How much does it cost to hire a senior ReactJS developer

In the United States, the average salary for a React developer across all industries is around $108,175 or $52 an hour. This data was collected from ZipRecruiter which compiles information from employer job postings and other third-party sources. 

Senior React developers in the United States can make upwards of $163,000 a year and beyond if they are working in big tech or Silicon Valley. This is due to the costs of living and resources that these companies have.

Many tech companies look to nearshore and offshore countries to find React developers at a lower rate. Outsourcing can be a convenient way for small and medium-sized companies (SMBs) to meet their needs while reducing operating expenditures.

Senior developers who are based in Latin America, for instance, make about $100,000. While this is a great value considering the cost of living in South America, this is relatively inexpensive compared to developer rates in the United States. Again, the cost of living and market economics play a big role here.  

Writing the best job description to hire senior ReactJS developers

The best job descriptions are straightforward with relevant details that allow candidates to validate themselves against what you’re looking for. You can use the following guidelines when building your own job description to hire senior ReactJS developers. 

  • Must-haves and nice-to-haves: Be specific about the technologies and technical skills you’re looking for and what types of skills or experience you believe are nice to have for candidates to land on the shortlist. 

 

  • Responsibilities: Every company has a different definition of senior or mid-level and the responsibilities that come with it based on their company size and complexity. Be clear about what their individual responsibilities will be in their day-to-day work. 

 

  • What to expect in X-months: Be upfront about what you’ll expect from newly hired developers in 1 month, 3 months, and 6 months. Make sure that it’s reasonable.

 

  • Interview process: If you have an interview process, be transparent about it so that you can reduce candidate attrition.

 

  • Strong communication: Underrated but never understated, communication makes or breaks most developers’ relationships with the teams that they work with. Better to make it explicit to candidates that communication means everything to your team and without it, they will not last long.

Interview questions to hire senior ReactJS developers

With a quality job description, you’ll be spending a lot of time screening and interviewing candidates. This is the most time-intensive part of the hiring process and also the most crucial. 

Everyone has their own approach to interviewing candidates, and we have ours as well. Over time, the conventions have changed based on feedback from the engineering community and also the experiences gained interviewing over 30,000 developers. 

Technical interview modalities change depending on the company. Teams with high standards strongly emphasize data structure, algorithms, and systems design/knowledge questions. Others might focus more on practical knowledge with specific technologies and frameworks.

When it comes to soft skills or cultural fit, the questions that companies will ask will also vary greatly. Some will take an analytical/technical approach, while others will ask questions that are intuitive for them.

There’s no right or wrong, only strong or weak signals.

Keep in mind that a candidate’s ability to answer questions does not deliver strong signals about their overall ability to perform well on your team. It simply shows you that they might be able to code their way out of a paper bag with the technology you testing for.

Advanced react.js concepts

Is there a way to cancel an API request inside a useEffect?

Yes, there is a way to do this by using AbortController:

				
					useEffect(() => {
  const controller = new AbortController();
  const signal = controller.signal;
           
  fetch('your-api-url', { signal })
    .then(res => res.json())
    .then(res => setData(res))
    .catch(error => {
      if (error.name !== 'AbortError') {
        console.error(error.message);
      }
    }
  );

  return () => controller.abort();
}, []);
				
			

The following code doesn’t preserve the component state when isFavorite changes, how can you prevent/fix this?

				
					import { useState } from 'react';

export default function App() {
  const [isFavorite, setIsFavorite] = useState(false);
 
  if (isFavorite) {
    return (
&nbsp; &nbsp; &nbsp; <div>
&nbsp; &nbsp; &nbsp; &nbsp; <component isfavorite="{true}"></component>
&nbsp; &nbsp; &nbsp; </div>
&nbsp; &nbsp; );
&nbsp; }

&nbsp; return (
&nbsp; &nbsp; <div>
&nbsp; &nbsp; &nbsp; <component isfavorite="{false}"></component>
&nbsp; &nbsp; </div>
&nbsp; );
}

function Component({ isFavorite }) {
&nbsp; const [number, setNumber] = useState(0);

&nbsp; let className = 'number';
&nbsp;
&nbsp; if (isFavorite) {
&nbsp; &nbsp; className += ' isFavorite';
&nbsp; }

&nbsp; return (
&nbsp; &nbsp; <div classname="{className}">
&nbsp; &nbsp; &nbsp; <button onclick="{()"> setNumber(number + 1)}&gt;
&nbsp; &nbsp; &nbsp; &nbsp; +
&nbsp; &nbsp; &nbsp; </button>
&nbsp; &nbsp; </div>
&nbsp; );
}
				
			

When a component is rendered, the state is preserved as long as it’s still in the UI tree. Issues can occur if the component is unmounted and then remounted somewhere else in the tree, and the state will be lost.

To prevent this, render the component within the same parent div to ensure that the state is preserved even if moved around in the UI tree. This way, the component can be safely unmounted and remounted without losing its state.

				
					{isFavorite ? (
&nbsp; <component isfavorite="{true}"></component>
&nbsp; ) : (
&nbsp; <component isfavorite="{false}"></component>
)}
				
			

For more interview questions for senior ReactJS developers, check out our Interview Questions page.

Why use ReactJS in your application

The user interface is the center point of an end user’s experience with an app.

Whether it’s a web or mobile application, which visual library you use to power it is important. It’s been an age-old debate for years, React vs. Angular vs. Vue, with companies using one or the other.

According to the numbers, the battle for superiority has already been won by React. Let’s figure out why by breaking down a few of the advantages of React.js so you can determine whether or not you want to implement it as your new front-end technology.

ReactJS is a visual library for JavaScript created by Facebook to power UI’s that are reactive and reflective of each user’s individual experience within an app. 

Designed to accommodate apps that are highly personalized experiences, it makes complete sense that a company like Facebook which owns some of the largest personalized social networks and communication tools would create something like React.

By dynamically changing the app’s UI based on the data that a user inputs, React JS stands out as the ideal choice as a visual library for your project if it has functions and features such as user profiles, curated content, or customizable interfaces.

The way React prioritizes dynamic experiences makes it stand out as an ideal choice if User-Experience (UX) is something you are trying to prioritize with your app.

UX is increasingly becoming one of those things that make or break your app in an industry as competitive as tech, so considering it heavily during your development is vital.

ReactJS has been noted for being a lot more user-friendly from a development angle. It utilizes a Virtual DOM as opposed to a Real DOM, making updating apps and testing performance a lot more approachable for developers.

By making it easy to reuse code in different parts of your development environment, user interfaces can be designed and programmed in a way that favors quick-development, saving lots of time for other aspects of development.

The way React.js is designed allows it to be much more stable than other visual libraries, removing many of the headaches from front-end development. 

The ability to quickly deploy dynamic user interfaces in a way that considers both the end-user and developers makes React.js a well-rounded choice for powering your front-end development.

Hire senior ReactJS developers - final thoughts

Hiring senior ReactJS developers isn’t easy and will take a considerable amount of your time. Time is not a luxury and as an engineering leader, you will most likely need to balance your work week between optimizing processes and hiring. That type of context switching is not recommended when better alternatives exist to find talent. 

More importantly, making the wrong hire is expensive both in time and cost. 

To offload the hiring process, rapidly speed up your time-to-hire, and mitigate risk, reach out to us at Trio. Our 3-step interview process was designed specifically to capture senior-level technical and soft-skill signals and hire the right senior ReactJS developers for your team.

With Trio, you can focus on what you love most - deliver great products while we handpick and shortlist from our pre-vetted talent network. We’ll enable payroll, benefits, taxes, and local compliance and support you with onboarding and long-term talent management. 

Happy hiring! 🙂

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