A JavaScript development company that builds the whole stack, not just the screens.

JavaScript development is the building of software in JavaScript, the programming language that runs in every web browser and, through Node.js, on the server as well. It is what makes web pages interactive, and with Node it also powers the back end, so a single language can span both the screens people use and the logic and data behind them. Frameworks like React, Angular and Vue are used for front ends, and Node.js with tools like Express or Nest for the server side.

A JavaScript development company designs, builds, tests and maintains this software for you, from a single interactive front end to a complete full-stack web application, and often modernises or rescues an existing JavaScript codebase. Avaib has built software since 2004, across more than 600 projects, with senior full-stack specialists, so we can build new JavaScript software or make an existing one dependable.

A full range of web software. On the front end we build fast, responsive interfaces in React, Angular and Vue. As full-stack, we build complete applications with a Node.js back end, a database and proper authentication, so you get a finished product rather than just the screens.

We also build SEO-safe server-rendered sites with Next.js and Nuxt, migrate loosely-typed code to TypeScript, optimise performance and bundle size for mobile, and rescue ageing or abandoned JavaScript codebases so they are safe to build on again.

Both, and this is one of the most common gaps we are called in to fill. Many "JavaScript developers" only do the front end, so businesses end up with attractive screens and no working application behind them. We build the front end, the Node.js back end, the database and the security as one connected product.

That means the business logic, the authentication, the payments and the integrations are all handled properly, by senior people who own the whole stack, so what you get is a complete, finished piece of software, not a half-built one.

Yes. A plain single-page app renders its content in the browser, which means the search engine often receives a nearly empty page and cannot index your content properly, so you quietly lose traffic. We fix this by rebuilding or reworking the site with server-side rendering and pre-rendering, using Next.js or Nuxt.

With that in place, your pages arrive fully formed on the first request, so Google can see and rank them, while your visitors still get the fast, app-like experience. We also tidy up performance and mobile speed at the same time, since those affect ranking too.

Often it is not. JavaScript frameworks move quickly, so working software gets labelled "legacy" far sooner than it actually needs replacing, and a full rewrite is an easy thing to sell. We start by giving you an honest, independent read on the real state of your codebase.

In many cases we can stabilise it, update the parts that genuinely need it, harden the dependencies and modernise it in place, on a plan sized to your budget, without the cost and risk of starting from scratch. A rewrite is a last resort, not our opening offer.

It depends on the scope, since a single-page front end is very different from a full-stack application, an SEO-safe rebuild or a large codebase rescue. That is why we scope the work clearly up front and give you a fixed, plain-English quote before any development starts, so there are no open-ended surprises.

Our senior JavaScript engineers work at a cost-effective rate of around USD 25 per hour, the same capability Australian, US, Canadian and Middle-East firms charge a fortune for, and AI-accelerated delivery helps get you there faster. After a short conversation we will send you a free, no-obligation written estimate with a clear scope.

You own everything. We hand you the full code, the data and the documentation in standard, well-supported JavaScript, so any capable JavaScript team can run and extend it. There is no lock-in to us and no dependence on a single developer.

We deliberately avoid bespoke, undocumented structures that only we can maintain. You stay with Avaib because the work keeps delivering value, not because you are trapped.