React and Next.js development agency
React and Next.js developers in Sydney and Melbourne
Our senior engineers design, build, take over and upgrade web apps and platforms in React and Next.js, for founders and established brands including Webjet and Erin Living. We build for web and mobile, so you get an honest recommendation, not a sales pitch.
- Web apps and platforms in React and Next.js
- Sydney and Melbourne team
- Trusted by Webjet and Erin Living
- Trusted by Webjet, and Erin Living
- Founded 2014, Sydney and Melbourne team
What we do with React and Next.js
Whether you are starting from a blank page or inheriting an app someone else built, we cover the whole life of a React product.
New React and Next.js apps
From MVP to launch. We design and build your web app or platform, integrate your backend, payments and third-party services, and set up hosting and deployment.
Take over an existing app
Your agency or freelancer has moved on? We review the codebase, stabilise it, document it and keep shipping, without a rewrite unless it is truly needed.
Upgrades and modernisation
Older React apps fall behind fast. We upgrade React and Next.js versions, migrate off outdated libraries and build tools, and fix performance along the way.
Fast, findable websites
With Next.js server rendering and static generation, public pages load fast and can rank in search. We check Core Web Vitals before launch.
Support and optimisation
Ongoing support that keeps your web app updated, secure and improving after launch.
Built it with AI?
If your app came from Cursor, Lovable or Bolt, our fixed-price audit tells you what to fix, what to cut and what it costs to launch.
React apps we have built
A few of the web products our team has designed, built and supported.
Travel
Webjet
Strategic and development services for Webjet's front-end websites, in a long-standing partnership that has grown over the years.
Property
Erin Living
The web app behind Erin Living's MVP launch, defined and built with the founders as the business grew.
Retail
Lasoo
The Lasoo.com.au website and app, delivered on a tight launch timeline alongside Lasoo's own team.
Your project
Have a React app that needs work?
New build, takeover or upgrade, we will tell you plainly what it needs and what it costs.
And many more, for startups, enterprise and government. See all case studies.
Why teams choose Rocket Lab for React
Web and mobile
We build React web apps and React Native mobile apps, so your web and mobile products can share skills and often code.
Senior and local
Your app is designed and built by our Australian-based team in Sydney and Melbourne, and you work directly with the people writing the code.
Built to last
We build apps you can keep improving for years. Clients like James Hardie have worked with us for over a decade.
Faster with AI, safely
We use AI coding tools every day to move faster, and a person reviews what we ship to your users.
Our preferred technologies for web design and development
Design: Figma
Front end: ReactJS, Next.js, TypeScript
APIs: GraphQL
Testing: Jest
How a React project runs
Discovery
We agree goals, users, scope and the must-haves for launch, then give you a fixed quote.
Design and prototype
Clickable designs you can test before a line of code is written.
Build in sprints
Regular demos on real devices so you see progress every fortnight.
Test and launch
QA across browsers and devices, then a production release with monitoring in place.
Support and grow
Updates, monitoring and new features after launch.
React and Next.js FAQs
What are React and Next.js?
React is an open-source library created by Meta for building user interfaces. Next.js is a framework built on React that adds routing, server rendering and static generation, so pages load fast and can be indexed by search engines.
Should we use React or Next.js?
Next.js is built on React, so it is not either or. We usually recommend Next.js for public websites and products that need to rank and load fast, and React on its own for logged-in apps and dashboards.
Do you build mobile apps too?
Yes. We build iOS and Android apps with React Native, which shares skills and often code with a React web app.
How do you handle SEO and performance?
For pages that need to rank, we use server rendering or static generation with Next.js, keep JavaScript bundles small, optimise images and fonts, and check Core Web Vitals before launch.
How much does a React web app cost in Australia?
It depends on scope: the number of screens, integrations, user roles and backend work. We give every project a fixed quote after a short discovery phase, and a free consultation is enough for a ballpark.
How long does it take to build a React web app?
A focused first release usually takes 2 to 3 months, a medium-sized app 4 to 6 months, and a larger platform 6 months or more.
Can you take over our React codebase?
Yes. We start with a code review to understand its health, then stabilise, upgrade and keep building. If it was built mostly with AI tools, our fixed-price App Rescue Report (from A$2,950) is the fastest way to find out where it stands.
Do you upgrade old React apps?
Yes. Old React apps get stuck on outdated libraries, build tools and Node versions, which makes every change slower and riskier. We plan and run upgrades to current React and Next.js versions.
Do you only work with clients in Sydney and Melbourne?
Our team is based in Sydney and Melbourne, and we work with clients across Australia.
Cost and timelines
Every project gets a fixed quote after a short discovery phase. As a guide, how long a project usually takes:
Focused first release
2 to 3 months
Medium-sized app
4 to 6 months
Larger platform
6 months or more
Other technologies we work with
New React Native apps, takeovers, upgrades and maintenance for iOS and Android.
GraphQL API design and development for web and mobile apps.
Installable, offline-capable progressive web apps built with React and Next.js.
Headless CMS builds with Directus: content models, REST and GraphQL APIs, and dashboards your team can use.
In our clients' words
Founders and long-term partners on what it is like to build with us.
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We have a long standing partnership with Rocket Lab who provide Webjet with critical strategic and development services for our front-end websites.
Over the years Rocket Lab have seamlessly integrated with James Hardie in delivering a number of key projects for the business that to this day continue to be critical to the success and functionality of our operations.
When it comes to out-sourcing and partnering with a technology vendor, Rocket Lab is top of mind. Julien, Jen and the team are incredibly detailed and thorough whenever they’re engaged in a project. And, they do so at velocity.
Rocket Lab’s ability to help define and execute our business through software in a timely fashion, has been a breath of fresh air and a pleasure to work with.
The guys worked together very well with our internal resources and blended into our process seamlessly. We were very impressed with the level of skill from each of the engineers…
Our business has hundreds of suppliers and thousands of customers so we needed a highly robust structure and that’s exactly what was delivered by Julien, Jen and the RL development team.
Julien and his team are a real pleasure to work with. They are well rounded with a solid understanding of design/user experience best practices as well as diving deep under the hood with solid web and app development capabilities.
Their team delivered a site that met our expectations, and they’ve continued to assist us in refining and enhancing it over time. They are dedicated, creative, and technically skilled, helping to ensure our website looks good and functions smoothly.
Tell us what you are building.
A 30-minute call. No pitch deck, no obligation. We will tell you if we are the right fit.
