React.js - Capabilities - Expertise

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8+ years of React & frontend delivery

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Mid-market focus: SaaS, dashboards, platforms

enterprise

Playbooks for SPAs, design systems, and modernization

enterprise

Performance and UX-focused React engineering

Talk to a React lead

Get the React optimisation guide

When to bring in our React.js team?

If any of these sound familiar, you’re exactly the kind of team we help.

Inconsistent UI and design debt

Different teams have shipped their own components and styles. Screens look and behave differently, and every new feature adds more inconsistency.

Slow, clunky React screens

Initial loads feel heavy, transitions are janky, and core user journeys drop off because of poor perceived performance and Core Web Vitals.

Legacy or mixed frontend stack

A mix of jQuery, server-rendered pages, and React sprinkled on top makes it hard to reason about behaviour or move confidently.

Frontend team stretched too thin

Product, bugs, and rewrites all compete for attention. Your backend or full-stack engineers are forced to carry complex React work without the right support.

No design system or component library

Every product squad reinvents the same button, modal, and table. Changes are slow, regressions are common, and design feedback loops are painful.

SEO and SSR gaps

Marketing and product pages rely on React, but search rankings, social previews, and performance aren’t where they should be without proper SSR and routing.

React.js services

From new builds to messy legacy frontends, we plug into your React stack where it matters most.

New React product builds & frontends

We design and build React frontends for new products: architecture, component structure, state management, testing, and CI/CD so your team can keep shipping.

React rescue & modernization

We audit your current React stack, untangle complex components, simplify state management, and create a pragmatic modernization roadmap instead of a risky rewrite.

Performance, UX & Core Web Vitals optimisation

We profile your app, reduce bundle size, improve rendering, and optimize network usage so key flows feel fast and users stay engaged.

Design systems & component libraries

We define design tokens, build reusable React components, and wire them into Storybook so designers and engineers move faster with fewer regressions.

Next.js & SSR for SEO-friendly apps

We use frameworks like Next.js to improve routing, server-side rendering, and data fetching, so your marketing and product surfaces are fast and indexable.

Embedded React team (staff augmentation)

Senior React engineers embed with your team to lead key initiatives, review critical code, and mentor your in-house engineers.

Our React playbook

We don’t just write React components, we bring a structured, revenue-first playbook to every frontend engagement.

Assess: Frontend & UX audit

Review your React architecture, components, state management, and API integration

Profile performance, Core Web Vitals, and UX friction across key user journeys

Output: audit report + prioritised issues

Align: 90-day value plan

Co-design a 6–12 week roadmap focused on UX, speed, and product outcomes

Decide where to invest first: navigation, core flows, performance, or design system work

Output: clear backlog with measurable outcomes

Stabilize: Make the UI predictable

Address the worst regressions and flaky UI behaviour

Improve testing and visual regression coverage around critical journeys

Output: fewer broken screens, more confidence in every deploy

Optimize: Performance & developer experience

Optimize bundle size, rendering patterns, and data fetching

Streamline local development, linting, formatting, and CI for React

Output: faster app, happier customers, and faster engineers

Grow: Enable your team

Pair programming, reviews, and architecture guidance with your team

Document conventions, patterns, and guardrails for future React work

Output: a stronger team that can keep improving without us

React stack we work with

We plug into modern, production React environments and the ecosystems around them.

React 17–18 and modern JSX
Next.js, Vite, and other modern build tools
TypeScript, modern JavaScript, and state libraries like Redux Toolkit, Zustand, and React Query
UI libraries and CSS approaches: Tailwind, CSS Modules, MUI, Chakra UI, and custom design systems
Testing with Jest, React Testing Library, Cypress or Playwright
CI/CD pipelines with GitHub Actions, GitLab CI, CircleCI, etc.
Frontend observability: error tracking, performance monitoring, and user session replay

For you, this means we can meet your frontend stack where it is today, not force a shiny greenfield blueprint that ignores reality.

Results we’ve delivered with React.js

Some snapshots of what our React frontend work has achieved.

Case study

Increasing customer happiness with Discourse

Read about how our consultants used Discourse for our customer to increase their end users' happiness

Read the case study

What our clients say

RocketApex has been truly awesome to work with. There's a tremendous number of software vendors to choose from and making the initial decision was difficult, but after a few communications, I chose RocketApex and I can't imagine I could have made a better decision. Their speed and expertise has been invaluable and it does not seem possible that another vendor could have been better. Thank you RocketApex for your great communication, expertise, and professionalism."

Chris Cunningham

Sales Director, North Carolina, United States

Intelatek Inc

I had the pleasure of working with RocketApex and was impressed with their exceptional technical skills, attention to detail, and commitment to quality.

The consultants demonstrated a deep understanding of Ruby on Rails, quickly identifying and resolving any issues that arose during the project. They were proactive in suggesting improvements and optimizations to our codebase, making our application faster and more efficient.

Their communication skills were excellent, always keeping me updated on the project's progress and making collaboration effortless.

Overall, I highly recommend RocketApex to anyone seeking a reliable and skilled Ruby on Rails team.

Florian Felsing

Chief Technology Officer, Germany

Global Commerce Media GmbH

RocketApex was great! They competently got the job done, was great at communicating, and clearly is a talented software vendor. I am a software engineer myself and they understood the requirements exactly and got the job done well.

Nate Clark

CEO & Founder, Greater Orlando, United States

Konnected Inc

Why teams choose RocketApex for React.js

There are many React agencies. Here’s what our clients say sets us apart.

Revenue-first delivery

We don’t optimize React for its own sake. We connect frontend decisions to sign-ups, activation, retention, and conversion.

Mid-market specialization

We’re built for companies beyond “early startup”, but not yet “enterprise bureaucracy”. Roadmaps, communication, and pricing that fit $10–250M businesses.

Opinionated but pragmatic React architecture

We use patterns that work: clear boundaries, reusable components, fast tests, and maintainable code, not over-engineered abstractions.

Performance and accessibility by default

We care about Core Web Vitals, accessibility, and UX details so your product feels fast and inclusive for everyone.

Embedded collaboration, not black-box outsourcing

We pair, review, and coach. Your team gets stronger while the system gets better.

React.js resources from RocketApex

Free guide: 10 practical ways to improve your React front-end

Identify and fix the highest-impact UX and performance issues
Reduce regressions as your React app and team grow
Improve component reuse and design consistency
Lay foundations for design systems and better Core Web Vitals

Drop your email and we’ll send the guide directly to your inbox.

Articles & insights

Are Selenium tests worth maintaining?

Many teams struggle with maintaining proper selenium tests over the time. We look at what makes selenium tests easy to maintain and how to prevent bloated tests.

Read the article

Top 5 best practices for using Kafka for data pipelines

Kafka can double up as event pipelines as well as data pipelines. In this article, we talk about how to use Kafka as a data pipeline and the best practice surrounding it.

Read the article

React.js FAQ

Do you only work with the latest version of React?

No. We regularly work with apps on older React versions, class components, or mixed stacks. We help you modernise incrementally rather than insisting on a risky big-bang rewrite.

Can you help us modernise an existing React app instead of rebuilding?

Yes. Modernization is one of our core strengths. We prefer to stabilize, refactor, and incrementally improve where possible, and only recommend rewrites in narrow, justified cases.

How quickly can you start on a React rescue or performance project?

After an initial call and a short discovery, we usually begin with a focused React and UX audit. From there, we define a 6–12 week plan with you before expanding scope.

Will you replace our engineering team?

Usually not. Most of our engagements involve working closely with an existing team, pairing, reviewing, and leading certain frontend initiatives, so the team is stronger at the end of the engagement than at the start.

How do you price React work?

We use simple engagement models: outcome-based projects for well-scoped work, and dedicated pods for ongoing product development. We’ll recommend a model after understanding your roadmap and constraints.

Do you offer ongoing support and SLAs for React frontends?

Yes. We can provide ongoing support and SLAs for production React frontends, typically paired with continuous improvement work so the experience keeps getting better, not just “kept alive”.

Can you work alongside our existing design team?

Yes. We usually work wth existing design teams and we take inputs from their design systems, suggestions. If you don't have a design team, we will use our own teams for designs.