Hire Only Senior Node.js Developers

Trio focuses on finding the best Node.js 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.

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Why Companies Choose Trio

Only Seniors


All Trio Developers are senior-level with proven experience.


7 days

to fill most roles, sometimes within 3 days.

Time Saved 

50+ hours

of time saved sourcing and interviewing candidates.



Our engineers stay on teams for 2+ years on average

 CriteriaTrioInternal HiringMarketplace
1Time to find a senior  developer0-3 weeks1-4 Months1-4 Months
2Recruiting FeeNone15%-40%None
3Quality GuaranteeYesNoNo
4Failure RateVery LowLowVery High
5Pre-Screened CandidatesYesNoNo
6Deep Technical ValidationYesNoNo
7Termination CostsNoneVery highNone

How does Trio work?


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


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 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.


Guaranteed excellence

As soon you review and sign off on a senior 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 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 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.


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 developers that are available when you are, and eager to work with you remotely.

Frequently Asked Questions

Trio’s senior Node.js developers in Latin America aren’t your typical developer. They are seasoned professionals who not only can understand your business goals and product needs but also bring long-term stability to your project. Trio goes above and beyond by providing senior Node.js developers with the necessary resources and continuous training to enhance their skills and ensure their career growth over time.

Yes, it’s more than possible to hire senior Node.js developers in less than 5 days with Trio. However, it’s important to be realistic and plan for an effective onboarding process. We highly recommend that engineers start the week after accepting an offer from Trio, allowing them to begin fresh at the start of the week. Our team of experts will be there to support you every step of the way, familiarizing themselves with your onboarding processes to save you valuable time.

Trio’s process has been perfected over years of continuous experience scaling and managing high-performance engineering teams. We prioritize understanding your unique requirements to ensure we can provide the perfect senior Node.js developer for your team.

Our meticulous yet lean interview process is designed to identify the signals that align with your specific needs. With an extreme level of detail and transparency, we present experienced candidates who truly meet your expectations.

When you work with Trio, you’ll experience the true essence of collaboration. Communication is our top priority, as we believe in delivering the utmost value to our partners. Trio gives you access to the finest senior Node.js developers in Latin America.

Our engineering managers are also some of the brightest and most passionate professionals in the field. They go above and beyond to ensure that each developer allocated to your team is not only happy and healthy but also consistently surpassing your expectations.

At Trio, dedicated support is a no-brainer. Engineering managers are placed at no extra cost to you. These managers take responsibility for meeting the needs of both the developers and your team’s objectives on a week-to-week basis. While they support your project and engineering managers, their primary goal is to enable your team to focus on what truly matters – delivering new features on time.

When searching for a senior Node.js developer, look for individuals who possess an advanced understanding of the Node.js ecosystem, including popular frameworks like Express.js, Koa.js, or Hapi.js. They should be well-versed in asynchronous programming techniques and have a deep understanding of concepts like callbacks, promises, and async/await. Additionally, their expertise in working with databases like MongoDB, PostgreSQL, or MySQL is crucial. Look for developers who can write clean, modular, and scalable code. Strong problem-solving skills and a passion for staying updated with the latest Node.js trends and technologies are qualities that should not be overlooked.

Node.js serves as a powerful platform for building scalable and high-performance web applications, APIs, and real-time applications. It excels in handling concurrent connections and enables efficient server-side JavaScript execution.

Node.js offers several advantages for web application development. Its event-driven, non-blocking architecture allows for efficient handling of concurrent requests, resulting in high scalability and improved application performance.

With Node.js, you can use JavaScript as the single language for both frontend and backend development, promoting code reuse and streamlining the development process. 

Node.js’s vast ecosystem, including frameworks like Express.js and libraries like Socket.IO, provides a wealth of tools and resources to expedite development. Moreover, Node.js is well-suited for real-time applications, enabling bidirectional communication and instant data updates.

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 smiling man with curly dark hair, clean-shaven, wearing a white shirt over a yellow t-shirt.


Node.js Developer

7 years of experience

Lucas is a B.Sc. in Computer Science and an A.A.S. in Computer Programming with an overarching knowledge of software development and a deep understanding of the process of managing a software project from requirements to launch. He has experience working with both backend and frontend and dealing with the intricacies of deployment in Cloud environments such as AWS and GCP. Lucas is also a certified Project Manager with experience handling all phases of a project using an Agile methodology.







How to find and hire the best senior Node.js developers for your team

Node.js has emerged as a powerful and versatile technology for building web applications. It is an open-source, server-side JavaScript runtime environment that allows developers to execute JavaScript code outside the browser.

With its event-driven architecture and non-blocking I/O model, Node.js enables highly scalable and efficient application development.

Node.js has gained significant popularity among engineering leaders. Its ability to handle many concurrent connections with low latency makes it an ideal choice for building real-time applications, streaming services, and microservices architecture.

In this guide, we will provide valuable insights on effectively hiring senior Node.js developers.

If you’re looking to scale your team quickly and safely, Trio can speed up the hiring process and guarantee the best senior Node.js developers for your team.

Node.js quick facts

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Roles and responsibilities of a senior Node.js developer

When seeking to hire a senior Node.js developer, understanding their roles and responsibilities is crucial. Here are the key areas where senior-level developers excel:

Architecting and designing scalable Node.js applications

Senior Node.js developers possess a deep understanding of software architecture principles and can design robust and scalable systems that handle high traffic and large datasets efficiently. They analyze project requirements, identify the optimal architectural patterns, and define the overall structure of the application.

Writing clean and maintainable code

Senior developers adhere to best practices and coding standards, ensuring that the codebase remains readable, maintainable, and easily extensible. They emphasize modularization and separation of concerns to create a well-organized and manageable codebase. By applying design patterns and following coding conventions, they contribute to the overall quality of the software.

Performance optimization and debugging

Senior Node.js developers are skilled in profiling and optimizing code for enhanced performance. They have a strong grasp of memory management and can identify and resolve performance bottlenecks, optimizing application speed and efficiency. They also excel in debugging complex issues, using tools and techniques to identify and fix bugs.

Collaboration and mentoring

Senior developers actively contribute to the growth and development of the engineering team by sharing their knowledge, providing code reviews, and guiding junior developers. They foster a collaborative environment, promoting effective communication and teamwork. They act as mentors, assisting their colleagues in acquiring new skills and improving their expertise in Node.js.

Stay updated with industry trends

Senior Node.js developers are continuously learning and staying abreast of the latest trends and emerging technologies in the Node.js ecosystem. They explore new tools, frameworks, and libraries, evaluating their suitability for the project at hand and introducing relevant innovations to the team. By staying up-to-date, they ensure that the applications they build leverage the most efficient and effective approaches.

Skills to look for in a senior Node.js Developer

When hiring senior Node.js developers, make sure to evaluate candidates based on the following skills. These skills are essential to back-end development overall.

Proficiency in JavaScript

A strong foundation in JavaScript is fundamental, as Node.js leverages JavaScript for server-side development. Senior developers should have a deep understanding of the language, including its core concepts, features, and modern standards, and its shenanigans. They should be adept at using JavaScript effectively to write clean, concise, and efficient code.

Knowledge of Node.js Frameworks and Libraries

Expertise in popular Node.js frameworks like Express.js, Koa.js, or Hapi.js is desirable. These frameworks provide essential building blocks for web application development, simplifying common tasks and promoting code reusability.

Additionally, familiarity with libraries such as Mongoose (for MongoDB integration), Sequelize (for SQL database interaction), or Redis (for caching and session management) can enhance a senior developer’s ability to build robust and scalable applications.

Experience with Asynchronous Programming

Given Node.js’s event-driven nature, senior developers should be proficient in asynchronous programming techniques. They should have a deep understanding of concepts such as callbacks, promises, and async/await.

Proficiency in handling asynchronous operations and managing concurrency is crucial to maximizing the performance and responsiveness of Node.js applications.

Understanding of database systems

A senior Node.js developer should possess expertise in working with databases, both SQL and NoSQL. They should have a solid understanding of database concepts, query optimization, and data modeling.

Experience and proficiency in interacting with databases like MongoDB, PostgreSQL, or MySQL is valuable, enabling them to design efficient data structures and optimize database operations.

Familiarity with DevOps practices

Experience with containerization technologies like Docker and orchestration tools like Kubernetes can be advantageous. Senior developers should be familiar with deploying applications to cloud platforms such as AWS, Azure, or Google Cloud.

Knowledge of continuous integration and deployment (CI/CD) pipelines, infrastructure-as-code, and monitoring tools are valuable for building scalable and robust production environments.

How much does it cost to hire a senior Node.js developer

Determining the cost of hiring a senior Node.js developer depends on various factors, including location, experience, and the complexity of the project. In general, senior-level developers command higher salaries due to their expertise and the value they bring to the team. Additionally, benefits, such as healthcare, retirement plans, and vacation time, should also be factored into the overall cost.

Writing the best job description to hire senior Node.js developers

Crafting an effective job description is crucial to attracting the right talent. Here are some key components to include:

Interview questions to hire senior Node.js developers

Explain the event loop in Node.js and how it facilitates asynchronous programming.

The event loop in Node.js is a fundamental concept that enables asynchronous programming. It is responsible for handling I/O operations and executing callbacks when they are ready. Here’s a simplified code snippet that demonstrates the event loop in action:

// Example asynchronous function
function fetchData(callback) {
  setTimeout(() => {
    const data = 'Hello, world!';
  }, 1000);

// Example usage of the asynchronous function
fetchData((data) => {

In the code snippet, the fetchData function simulates an asynchronous operation by using setTimeout to delay the execution of the callback. When the timeout completes, the callback is invoked, printing “Hello, world!” to the console.

Certainly! Here are some example answers to the advanced technical Node.js interview questions along with code snippets:

Discuss the differences between spawning a child process in Node.js using the `spawn()` and `fork()` methods.

In Node.js, the `spawn()` and `fork()` methods are used to create child processes, but they have some differences in how they operate. Here’s an explanation along with code snippets for both methods:

`spawn()` method: The `spawn()` method is used to create child processes that communicate with the parent process through streams. It is suitable for executing external commands or scripts. Here’s an example that spawns a child process to execute a shell command:


const { spawn } = require('child_process');

const ls = spawn('ls', ['-lh', '/usr']);

ls.stdout.on('data', (data) => {
  console.log(`stdout: ${data}`);

ls.stderr.on('data', (data) => {
  console.error(`stderr: ${data}`);

ls.on('close', (code) => {
  console.log(`child process exited with code ${code}`);

The `spawn()` method is used to execute the `ls -lh /usr` command. The output of the command is captured through the `stdout` and `stderr` streams of the child process.
`fork()` method: The `fork()` method is a variation of `spawn()` that creates a new Node.js process, allowing for communication between the parent and child processes using inter-process communication (IPC). Here’s an example that demonstrates forking a child process:

const { fork } = require('child_process');

const child = fork('child.js');

child.on('message', (message) => {
  console.log(`Received message from child process: ${message}`);

child.send('Hello from the parent process!');

The parent process forks a child process by executing the `child.js` file. The parent process sends a message to the child process using `send()`, and the child process receives it through the `’message’` event listener.

These examples demonstrate the differences in creating child processes using the `spawn()` and `fork()` methods, showcasing their respective use cases for executing commands and facilitating communication between processes.

Describe the purpose and benefits of using streams in Node.js. Provide examples of scenarios where streams are particularly useful.

Streams are a powerful feature in Node.js that allow for efficient handling of large amounts of data, especially when dealing with I/O operations. They provide a way to read or write data in chunks, rather than loading the entire data into memory. Here’s an example of using streams to read a file:

const fs = require("fs");

const readStream = fs.createReadStream("example.txt");

readStream.on("data", (chunk) => {

readStream.on("end", () => {
  console.log("Read operation complete");

In this example, the createReadStream method creates a readable stream from the “example.txt” file. The data event is emitted when a chunk of data is available, allowing you to process it. Finally, the end event is triggered when the reading operation is complete.

How can you handle memory leaks in a Node.js application? Discuss common causes of memory leaks and strategies to identify and resolve them.

Memory leaks can occur in Node.js applications when unused objects continue to occupy memory, leading to performance degradation. Proper memory management is crucial to prevent memory leaks. Here’s an example of detecting and resolving a common cause of memory leaks using the heapdump module:

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const heapdump = require("heapdump");

// Monitor memory usage periodically
setInterval(() => {
  const memoryUsage = process.memoryUsage();
  console.log(`Memory usage: ${JSON.stringify(memoryUsage)}`);
  // Check for excessive memory usage
  if (memoryUsage.heapUsed > 100 * 1024 * 1024) {
    // Capture a heap snapshot for analysis
    heapdump.writeSnapshot((err, filename) => {
      if (err) {
        console.error("Failed to capture heap snapshot:", err);
      } else {
        console.log("Heap snapshot captured:", filename);
        // Analyze the snapshot to identify the cause of the memory leak
        // Take appropriate steps to fix the memory leak issue
}, 5000);

In this example, we periodically monitor the memory usage using process.memoryUsage(). If the heap usage exceeds a certain threshold (e.g., 100 MB), we capture a heap snapshot using heapdump.writeSnapshot(). The snapshot file can be analyzed to identify objects or references causing the memory leak, allowing for appropriate actions to resolve the issue.

Please note that these code snippets provide simplified examples for demonstration purposes and may not cover all aspects or edge cases. Actual implementation may require further customization and error handling based on specific application requirements.

How would you optimize the performance of a Node.js application that experiences high traffic?

There are a few different ways to optimize Node.js applications, we’ll explore them along with some code snippets. You can ask to engineers to see if they know how to implement any of these approaches.

Implement caching: Caching can significantly improve the response time and reduce the load on your Node.js application. Here’s an example of implementing caching using the popular memory-cache package:

const cache = require("memory-cache");

// Middleware function to cache responses
function cacheMiddleware(req, res, next) {
  const key = "__my_cache_key__" + req.originalUrl || req.url;
  const cachedResponse = cache.get(key);
  if (cachedResponse) {
    return res.send(cachedResponse);
  } else {
    res.sendResponse = res.send;
    res.send = (body) => {
      cache.put(key, body, 60000); // Cache for 1 minute

// Usage
app.get("/api/data", cacheMiddleware, (req, res) => {
  // Process and send the response

The cacheMiddleware function acts as middleware that checks if the response is already cached. If a cached response exists, it is returned immediately. Otherwise, the response is processed and stored in the cache for subsequent requests.

Optimize database queries: Efficiently handling database queries is crucial for application performance. Here’s an example of optimizing a database query using indexing in MongoDB:

// Creating an index in MongoDB
db.collection("users").createIndex({ email: 1 }, { unique: true });

// Example query using the index
db.collection("users").findOne({ email: "example@example.com" });

Creating an index on the email field in the users collection can significantly improve query performance, especially when searching for specific email addresses.

Implement load balancing and scaling: to handle high traffic, you can distribute the load across multiple instances of your Node.js application using load balancing and scaling techniques. Here’s an example of setting up a load balancer using the cluster module:

const cluster = require("cluster");
const os = require("os");

if (cluster.isMaster) {
  const numWorkers = os.cpus().length;

  for (let i = 0; i < numWorkers; i++) {

  cluster.on("exit", (worker) => {
    console.log(`Worker ${worker.process.pid} died. Forking a new worker...`);
} else {
  // Worker process
  const app = require("./app");

  const port = process.env.PORT || 3000;
  app.listen(port, () => {
    console.log(`Server running on port ${port}`);

Why use Node.js in your application

Node.js has become the defacto back-end technology across many startups and larger tech companies in the United States. Beyond its low learning curve, and it’s JavaScript roots, Node.js has proven to be a solid architectural choice for the following reasons:

Hire senior Node.js developers - final thoughts

Finding and hiring the best senior Node.js developers for your team requires careful consideration of their roles, responsibilities, skills, and fit within your organization. By understanding the value of Node.js for web applications and crafting a comprehensive job description, you can attract top talent.

Thoroughly evaluating candidates through well-crafted interview questions and assessing their technical expertise, problem-solving skills, and communication abilities will help you build a strong team of senior Node.js developers.

With the right professionals on board, you can leverage the power of Node.js to create robust, scalable, and innovative web applications that meet the demands of the modern digital landscape.

If you’re looking to streamline your hiring process, minimize time-to-hire, and reduce risk, Trio is here to help. Our expertise lies in identifying and recruiting top-tier senior Node.js developers who are a perfect fit for your team.

With Trio, you can concentrate on what you’re truly passionate about—delivering an exceptional product—while we handle the intricate task of selecting and shortlisting candidates from our pool of pre-vetted talent. We take care of essential administrative functions such as payroll, benefits, taxes, and local compliance, ensuring a smooth onboarding process.

Our comprehensive 3-step interview process is designed to evaluate technical prowess and essential soft skills, enabling us to identify the ideal senior Node.js developers for your organization.

By partnering with Trio, you can reduce the hiring burden and get access to our long-term talent management support. We make sure that you have the right individuals on your team to drive success. Reach out to us at Trio to embark on a seamless and efficient hiring journey.

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