Hire Chai developers

Build robust JavaScript testing frameworks with expert Chai developers. Ensure seamless test automation—hire now and onboard quickly.

Hire Chai developers
  • Erich

    AI Engineer

    Bolivia/(GMT -4:00)

    Erich is a Strong Senior AI Engineer with deep expertise in production voice agent platforms, LLM orchestration, and end-to-end system architecture. He has led high-scale deployments in healthcare and telecom, owning design, deployment, and optimization for cost, latency, and conversion. Screenings highlight his clear communication, client-facing skills, and ability to operate as a lead or solo contributor.

    Experience

    8 years

    Availability

    Full-time

  • Ivan

    Front-end Web Developer

    Ukraine/(GMT +2:00)

    Ivan is a Senior Software Engineer with 7 years of experience building eye-catching user interfaces. As a front-end developer who utilizes React and Next.js, he excels in integrating sleek designs and engaging functionality into his projects. Having already ventured into the Web3 space, Ivan is well-suited to accelerate UI development. According to the results of this vetting process, Ivan might be considered a team player with strong communication skills!

    Experience

    9 years

    Availability

    Full-time

  • Alexandr

    Front-end Engineer

    Ukraine/(GMT +2:00)

    Experience

    8 years

    Availability

    To be verified

  • Grzegorz

    Full-stack Web Developer

    Poland/(GMT +1:00)

    Greg doesn't work; he does what he loves. He has 14 years of experience and a background in graphic design and is ready to take on any React + Node project. He is passionate about mentoring and sharing his knowledge with others. In addition, Greg is our tech interviewer and has worked on some of Lemon's projects, ensuring quality.

    Experience

    16 years

    Availability

    Part-time & Full-time

  • Deyan

    Full-stack Web Developer

    Bulgaria/(GMT +2:00)

    Deyan is an adaptive, responsible engineer who always gives his best to deliver the finest quality software. Client satisfaction and good-looking sustainable systems drive him forward. He loves solving problems through technology!

    Experience

    10 years

    Availability

    To be verified

  • Valeria

    Full-stack Web Developer

    Ukraine/(GMT +2:00)

    Valeria is a strong senior full-stack developer with 6 years of experience across diverse industries, including education, healthcare, marine tech, travel, and e-commerce. She is also skilled in rapidly learning new technologies and solving complex challenges through self-directed learning. Valeria has a proven track record of delivering high-quality, scalable solutions, from interactive educational platforms to secure e-commerce systems. She is passionate about continuous improvement and always strives to exceed expectations!

    Experience

    7 years

    Availability

    To be verified

  • Otávio

    Full-stack Web Developer

    Brazil/

    Otávio is a Senior Full-stack Developer with a back-end focus, bringing deep knowledge of Node.js, React, database design, and performance optimization. He has end-to-end product experience, having delivered a project as the sole engineer while also mentoring and guiding developers in team settings. In personal projects, he applies AI techniques, such as using Python to build summarization tools.

    Experience

    6 years

    Availability

    Full-time

  • Camila

    Graphic Designer

    Brazil/(GMT -3:00)

    Camila is a senior Graphic Designer with 9+ years of experience specializing in branding, marketing campaigns, event design, and visual communication across multiple channels. She has a strong track record of building cohesive brand identities and delivering creative solutions that support business and marketing objectives. Known for her collaborative mindset and transparent communication, she partners effectively with clients, marketers, product teams, and developers while taking ownership from concept through delivery. Her primary expertise is in graphic and brand design, with growing experience in UI/UX design

    Experience

    10 years

    Availability

    Full-time

  • Wes

    Full-stack Web Developer

    United States/(GMT -6:00)

    Meet Wes – a Senior Full Stack Engineer with 8+ years of experience in Python, React.js, and system architecture. With a background in banking, fintech, air defense, and transportation, Wes has led teams and made key architectural decisions, including at Capital One. Wes excels in both technical and leadership roles, with strong communication skills and a collaborative approach. His experience in system design and CI/CD pipelines, along with a passion for AI and start-up environments, makes him a valuable asset to any team.

    Experience

    9 years

    Availability

    Part-time & Full-time

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Developers who got their wings at

How it works

How to hire a developer through our platform

1

Place a free request

Fill out a short form and check out our ready-to-interview developers

2

Tell us about your needs

On a quick 30-min call, share your expectations and get a budget estimate

3

Interview the best

Get 2-3 expertly matched candidates within 24-48 hours and meet the worthiest

4

Onboard the chosen one

Your developer starts with a project—we deal with a contract, monthly payouts, and what not

Testimonials

Start to finish in under a week with zero wasted time

Reached out on Monday evening, connected Tuesday morning, had four qualified candidates by Wednesday.

Brian DeSpainBrian DeSpainCEO, 10X ERP
High quality, well-qualified developers

We had an excellent experience. Process is fast from the initial intake through setting up payment.

Katie RoyKatie RoyExecutive Director, The SPEND Initiative
7 developers hired in 24 hours

The developers helped us speed up. They quickly learned their part of the app and we’re grateful for their contribution.

Conor MackenConor MackenDirector of Engineering, tvScientific

What we do for you

Vet every developer

All our developers are fully vetted and tested for both soft and hard skills. No surprises!

1000+ already scanned profiles

Learn your needs

On a quick 30-min call, share your expectations and get a budget estimate

Human-centered estimation

Shortlist the best matches

Get 2-3 expertly matched candidates within 24-48 hours and meet the worthiest

Match in a 24 hours

Handle the paperwork

Your developer starts with a project—we deal with a contract, monthly payouts, and what not

Hire after 1–2 interviews

The lemon tea

Why hire Chai developers through our platform?

Find devs with skills you can trust with Lemon.io, so you can stop looking and start making progress again.

Why hire Chai

Over 6500 companies use Chai as their main framework, including giants like Google, Amazon and Lyft.

High-quality web apps

Chai's modular approach lets devs reuse components, so they can seamlessly manage app complexity.

Faster development process

Chai's architecture and a vast library of pre-built components speed up development, so you can get to market sooner.

Enjoyable user experience

From smooth, responsive interfaces to reduced loading times, devs can use Chai to boost usability.

Scaling made easy

Chai's modular, component-based architecture makes it easy to scale applications as traffic grows.

Case studies

Aerospace

The experience with Lemon.io has been fantastic. The interview process has been good, the caliber of people – excellent and integration has been very smooth.

Marc Horowitz
Marc HorowitzCOO of SkyFi
Explore case
Telecommunications

We needed extra developers to clean off all these bugs so the company could skyrocket.

Conor Macken
Conor MackenDirector of Engineering
Explore case
AI

We needed extra AI engineers to keep our ambitious project running.

Mike Lukiman
Mike LukimanFounding Senior Software Engineer at Everstar.ai
Explore case

Frequently asked questions

Where can I find Chai developers?

As an assertion library, frequently paired with JavaScript testing frameworks like Mocha and Jasmine, Chai appeals to engineers who are well-versed in the world of JavaScript. There would be potential Chai users on sites like Indeed or Dice, so hitting up JavaScript-specific channels is beneficial. Join JavaScript testing forums of developer communities, ask questions in Stack Overflow, or register for a workshop on specific JS unit-testing themes.

A more straightforward avenue is to rely on platforms like Lemon.io, which can connect experienced developers in Chai or other niche technologies with the relevant companies within 48 hours. All the software engineers who have joined our community have already been pre-screened, so they are ready to enter your project ASAP.

What is the no-risk trial period for hiring Chai developers on Lemon.io?

Just like other developer roles on our platform, we know that choosing the perfect Chai coder can be tough. That’s why we give every client access to a no-risk trial that includes working together directly on your needs. With the 20 hours provided, you’ll get to test their approach and problem-solving skills using this JavaScript framework and see their way of working.

Even during and after this trial, you remain covered. If you find the developer inadequate for your tasks, you can always take advantage of the replacement guarantee — we’d be more than happy to find a new one. Also, we need to mention that in 99% of cases, there is no need for replacement — our outlandish team works on matching tasks perfectly.

Is there a high demand for Chai developers?

Though Chai developer is not typically a standalone role, many places need someone good at using Chai with JavaScript code (often, they’ll use a combo like Chai, Mocha, and Sinon.js). If a company writes a lot of JavaScript (especially large and complicated websites or programs), they really care about having solid tools and processes for making sure everything works right.

Those who really believe in testing their code as they build new features often look for programmers who can create readable, easy-to-change, and helpful tests with Chai. This is really common in places like finance, online shops, and web development, and that means a need for developers with this testing know-how is ongoing.

How quickly can I hire a Chai developer through Lemon.io?

At Lemon.io, we can connect you with a curated selection of pre-vetted Chai developers within 48 hours or less of discussing your project needs. Many clients are ready to bring their new Chai developer on board in a few days after approving the candidate for the project.

What are the main strengths of Lemon.io’s platform?

Our global reach spans over 50 countries, with coders in every major timezone, ensuring the Lemon.io team can identify an ideal candidate no matter where your organization operates.

With administrative overhead being handled completely on our end, the developers we introduce are able to focus on creating the best tests possible without getting bogged down by needless emails.

Before onboarding a Chai specialist (or any other specialized role), we take them through our rigorous, multi-step vetting, including a screening call with recruiters and a technical interview led by a tech interviewer – a JavaScript engineer.

What is the vetting process for developers at Lemon.io?

This is how our vetting of the Chai developers shines through:

1. Candidates submit their profiles, demonstrating experience with Chai and JavaScript testing, which are evaluated.
2. We analyze CVs in-depth, comparing details against sites such as LinkedIn to confirm career history.
3. We employ Coderbyte for technical checks during the screening call that tests questions and challenges related to Chai knowledge and JavaScript testing skills.
4. All finalists are then invited to the final interview (led by a tech interviewer), which includes practical skills testing of Chai usage with live coding exercises.

How can your business benefit from hiring a Chai developer?

Chai developers know a lot about how to use the Chai assertion library. They write test codes for JavaScript web applications. These tests ensure that the code works properly to prevent functionality loss.

Businesses often using this language — particularly within e-commerce companies, banks, and software sold over the internet — have increased reliability and better code stability thanks to rigorous Chai tests, which reduce errors and improve product quality overall.

Chai is not the best fit?

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