Node.js® Development

Node.js back ends
that hold up under load

We build Node.js APIs and back-end services, tested under load before launch and watched once they’re live, so your team knows how each one is doing.

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You’re in good company

A few of the companies we’ve worked with.

When the back end can’t keep up

A back end, the part of your software that runs on servers and answers your apps, often starts quickly and gets harder to run. Packages pile up and fall behind, one slow task holds up every request, and problems show up first as customer complaints. Rewriting it in another language seldom helps: the trouble usually lies in how the service is put together.

What we build

Each service small enough to understand, with tests, logs and alerts from its first release.

  • APIs for your apps

    An API is the set of requests your apps can make to the back end, and the answers they get. We design, document and version each one, so the apps built on it keep working as it changes.

  • Back-end services

    The work behind your product, such as orders, accounts and payments, split into separate services only where that makes each one easier to change and run.

  • Real-time features

    Chat, live tracking and notifications that reach people as things change, over connections kept open, so apps don’t have to keep asking.

  • Connections to other systems

    Links to the platforms you already run, such as your CRM or payment provider, built to retry, log and alert when one of them is slow or down.

  • Moves from older stacks

    Older back ends rebuilt on the Node.js runtime one part at a time, each part switched over once its results match the old one’s.

  • Version upgrades

    Services kept on a Node.js release that still gets security fixes, upgraded in planned steps with the tests run at each one.

  • Speed under load

    Load tested at the traffic you expect, and beyond, before launch. Then the slow parts are fixed, from database queries to work that holds up other requests.

  • Tests and monitoring

    Automated tests on every change, then logs, metrics and alerts once it’s live, so your team hears about a problem before your customers do.

  • Security in the code

    Input checked wherever it comes in, secrets kept out of the code, and packages pinned to exact versions and checked for known vulnerabilities in every build.

Many requests at once, without waiting in line

A Node.js service runs your code on one main thread, which every request passes through. While a request waits on a database or another service, the thread moves on to the next one and comes back when the answer arrives.

Work that keeps the thread busy, such as building a large report, holds up every request behind it. So we move that work to a worker, a second thread that runs alongside, or to a separate job. A worker isn’t needed for waiting: the main thread already handles that well.

Where “Build a large report” runs

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Building the report keeps the main thread busy until it’s done, so the requests behind it wait, though each needs only a moment.

The worker builds the report alongside while the main thread goes on answering, so each request is answered as it arrives. The report comes back when it’s ready.

Easy to keep up to date

The Node.js project publishes its release schedule, and advises running production services only on long-term support releases, which get security fixes until a planned end-of-life date.

The packages a service depends on change on their own timetables. We keep them few and pin their exact versions, update them on a schedule, and try each upgrade on a preview copy first.

Start with a review of your back end

The review covers the back end you have: its packages, its tests, how it behaves under load, its logs and alerts, and how releases go. You get a written review under three headings, Keep, Fix and Rebuild, and a proposal for the first step.

Starting from nothing? We begin with the API your first app needs and the systems it has to reach.

Questions worth asking

  1. Is a Node.js back end the right choice for us?

    It suits services that spend much of their time waiting on databases and other services, and teams that already write JavaScript or TypeScript. For long, heavy calculations another language may fit better, and we’ll say so.

    Custom Software

  2. JavaScript or TypeScript?

    TypeScript, for most services. It’s JavaScript with types added, so many mistakes show up in the editor instead of in production. Recent Node.js releases can run many TypeScript files directly, by stripping out the types, but they don’t check them, so we run the TypeScript compiler on every change.

  3. Can you take over our existing back end?

    Yes, whoever built it. We read the code, its packages and its logs, and watch how it behaves under real traffic, before we change anything. Then we fix what causes the most trouble first.

  4. Can you build the front end too?

    Yes. We build web front ends in React and Next.js, planned together with the APIs they call.

    React & Next.js Development

  5. Can it connect to our other systems?

    Yes. We connect it to the platforms your business runs on, from CRM and ERP to finance, with one system in charge of each detail.

    Systems & API Integration

  6. Who hosts it?

    Hosting and the platform beneath your back end are a service of their own.

    Cloud, DevOps & Security

  7. Who looks after it once it’s live?

    We can: updates, security fixes and monitoring on a regular rhythm, with agreed response times, from a team that knows your system.

    Support & Maintenance

  8. How do you keep it secure?

    With threat modeling, code review and checks in every build, so security problems are found early and fixed by the team that writes your code. Its packages are part of that: pinned to exact versions and checked for known vulnerabilities.

    Application Security

  9. What does it cost?

    It depends on what the back end has to do and how much of it exists already. You get a written proposal before any work starts: the scope, the price or rate, and how you pay.

    Pricing

  10. Can your Node.js developers work inside our team?

    Yes. They work in your time zone, in your own tools and reviews, and nobody starts until you’ve met them.

    Hire Node.js Developers

  11. Can AI assistants use it?

    Yes, through an MCP server, which most often sits on top of an API like the ones we build, so the same rules apply wherever a request comes from.

    MCP & Agent Integration

Node.js is a registered trademark of the OpenJS Foundation. Webair isn’t affiliated with or endorsed by the OpenJS Foundation. Vercel, the Vercel design, Next.js and related marks, designs and logos are trademarks or registered trademarks of Vercel, Inc. or its affiliates in the US and other countries.

Let’s build it better

Tell us what your back end has to handle and where it struggles today. We’ll suggest where to begin.

Thanks, we’ll be in touch soon.

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