Hire Only Senior JavaScript Developers

Trio focuses on finding the best JavaScript 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 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 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

Senior JavaScript developers costs can vary depending on their experience, seniority, market demand, and proficiency in English. Salaries can range from $80K to $120K.

The hourly rate to hire a JavaScript developer and other senior web developers varies from $30 to $75, depending on factors such as experience, seniority, market demand, and proficiency in English.

Trio’s dedicated JavaScript developers stand out with their extensive experience and expertise. They possess a deep understanding of your business goals and product requirements, offering long-term stability to your projects. 

Trio goes the extra mile by equipping senior JavaScript developers with necessary resources and continuous training, ensuring their skills evolve and their careers flourish over time.

Absolutely! While it’s important to plan for an effective onboarding process, Trio can help you hire JavaScript programmers in less than 5 days. 

We recommend engineers start the week after accepting an offer from Trio, allowing them to begin fresh at the start of the week. Our expert team will support you throughout, familiarizing themselves with your onboarding processes to save you valuable time.

Trio’s process is built on years of experience in scaling and managing high-performance engineering teams. We prioritize understanding your unique requirements to ensure we help you hire javascript experts that deliver value to your team.

Our meticulous interview process is designed to identify candidates who align with your specific needs. With careful attention to detail and transparency, we present experienced candidates who truly meet your expectations.

Working with Trio embodies the essence of collaboration. Communication is our top priority, as we believe in delivering the utmost value to our partners. With Trio, you’ll be able to hire top JavaScript developers.

Our engineering managers are among the brightest and most passionate professionals in the field. They ensure that each developer assigned to your team is not only happy and healthy but consistently exceeds your expectations.

Absolutely! Trio understands the importance of dedicated support. Every senior JavaScript developer is paired with an engineering manager at no additional cost. These managers take responsibility for meeting the developers’ needs 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 seeking a senior JavaScript developer, look for individuals who possess an advanced understanding of the JavaScript language and its ecosystem. They should be well-versed in best practices and have a solid grasp of core concepts such as object-oriented programming, asynchronous programming, and DOM manipulation. It’s also crucial to consider their experience with popular frameworks like React, Angular, or Vue.

Look for developers who can write clean, modular, and maintainable code. Strong problem-solving skills and attention to detail when implementing complex logic are qualities that should not be overlooked.

JavaScript is a versatile programming language used for web development. It allows you to create dynamic and interactive elements on websites, handle client-side and server-side scripting, build web applications, and even develop mobile applications using frameworks like React Native.

JavaScript is a popular choice for web development due to its widespread adoption, extensive ecosystem, and versatility. It enables you to create interactive user interfaces, handle data manipulation and validation, and perform asynchronous operations seamlessly. 

With frameworks like React, Angular, or Vue, JavaScript empowers developers to build scalable and responsive web applications. Additionally, JavaScript’s active developer community provides access to abundant resources and libraries, making it easier to stay updated with the latest web development trends.

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

Listen to this content
Share this article
Content Curated by
Portrait of a man with tattoos on his neck and arms, wearing glasses, and a blue t-shirt.


JavaScript Developer

8 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.







How to Hire Top JavaScript Developers?

Hiring skilled JavaScript developers is crucial for any tech-driven business. As one of the most popular programming languages, JavaScript powers countless web and mobile applications. 

This guide provides a comprehensive look at hiring senior JavaScript developers, particularly through Trio, understanding the associated costs, and crafting effective job posts.

And if you’re interested in exploring faster and smarter ways to scale your team, we can help take your business further and help you fine top-tier senior JavaScript developers for your project.

What is JavaScript?

JavaScript is a dynamic programming language widely used in web development to create interactive effects within web browsers. It’s an essential part of web applications, alongside HTML and CSS, enabling functionalities ranging from simple page animations to complex app structures.

JavaScript’s versatility extends to server-side technologies (like Node.js), making it indispensable for full-stack development.

How to Hire a JavaScript Developer with Trio

Trio specializes in connecting companies with top-tier JavaScript developers from Latin America. Here’s how to leverage Trio for your hiring needs:

Define Your Requirements: Specify what you need in a JavaScript developer. Are you looking for front-end, back-end, or full-stack capabilities? Understanding your project’s needs helps Trio match you with the right talent.

Understanding the Cost of Hiring JavaScript Developers

The cost of hiring JavaScript developers can vary significantly based on several factors:

Trio helps navigate these factors, offering cost-effective solutions by connecting you with talent in regions with lower living costs but high expertise.

How to Write a JavaScript Developer Job Post for Trio

When creating a job post for a JavaScript developer, clarity and specificity are key. Here’s how to craft an effective job post:

Responsibilities and Qualifications



By following these guidelines, you can streamline the process of hiring a JavaScript developer with Trio, ensuring you get the best match for your project’s needs. With the right developer on board, you can push your projects to new heights and drive innovation in your business.

Hire Exceptional JavaScript Developers Quickly

Build dev teams you can trust
Companies are growing their business faster with Trio.

Share this article

Tech Your Business Further

Our partners are growing and innovating their businesses faster with Trio.

Download Our Ebook About Scaling Your Development Team

Learn how you can scale your development team, which is packed with expert insights.