JavaScript Development Services

Relevant has been providing full-stack JavaScript development services since 2013. We help mature businesses and startups set up remote full-stack JavaScript development team.

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Client testimonials

“Working with you guys has been fantastic. The level of expertise of your development team is as good as the people that we get in the UK. You’ve got a fantastic talent base of programmers over there in Ukraine. It’s more challenging to find people of that quality in the UK.”

Cassian Harisson
Co-founder of Splink Industries and My Theory Test App by James May

“We had the challenge to find a trustworthy software development company that we could rely on. We chose Relevant because we felt that they understood our business needs.”

Ole Jørgen Næss and Christopher Krohn
VP of Product and Engineering & Director of Strategic Partnerships and Integrations at Svenn (former 24onoff)
Get a quote for your project

Full-stack JS development solutions we provide

Frontend development

If you’re starting a web application, we’re here to implement the visual experience its users will love, using React.js, Angular.js or Vue.js frameworks.

Backend development

We will choose the right tech stack and develop a backend according to the latest best practices, using proven tools and technologies like Node.js, PHP, Python or Ruby.

API integration and development

Relevant’s experts will build reliable and secure connectivity between your systems and applications.

Database design

Our database designers ensure your data is properly stored and replicated, guaranteeing the optimal performance of your backend.

Tech Stack

We focus on technologies that allow for building reliable, nimble, and secure web products. Everything we build can be deployed in the cloud to ensure even higher performance and uptime.



Google Cloud
Microsoft Azure
IBM cloud

How we differ


Agile approach

We offer a highly-skilled team of specialists you can extend or reduce whenever you need.


Dedicated project manager

Our project managers can handle multiple tasks, planning and organizing the project workflow.


9/10 client satisfaction score

Satisfied clients are the fuel that powers our services. For every app we build, we make sure good relationships are built with it.


92% of the company – senior and middle engineers

We can boast of a team of experienced and talented specialists since we mostly hire only senior and middle engineers.


20% employee turnover rate

We nurture long-term relationships with our employees, which makes them want to continue working with us.


Thinking of the end user

Our thoughtful UX designs and usability practices create experiences that benefit customers.

Our JavaScript development projects


Developing a SaaS platform that assists UK homebuyers

View case


Gamifying customer support with a Zendesk app

The Netherlands
View case


Visualizing air quality sensor data in a web dashboard

View case

Engagement models

Decide which model best suits your project


What development process do you follow?

We follow the Agile methodology and our processes correspond with the average software development life-cycle. They include ideation, planning, designing, coding, testing, deployment, and maintenance.

How can I test the expertise of your developers?

As a reputable full-stack web development company, we assure you that all our engineers are qualified to implement professional software solutions. But If you plan to hire a full-stack developer at Relevant, you’re welcome to conduct as many interviews with our specialists as you need to make sure they are the right people for the job. This includes holding Skype calls and giving technical assignments to check their skills.

How do I track the progress of my project?

We use Atlassian’s famous Jira software for progress, issue, and bug tracking. As a manager, you’ll have special high-level access to this system.

Are your developers experienced in the Agile development methodology?

Absolutely. At Relevant, we follow Agile, Scrum, or Kanban depending on the project and the client’s requirements.

How many dedicated software developers can you allocate for my project?

From 1 to 100, depending on your project size and duration.

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