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React 19 · Next.js 15 · React Native · TanStack

React Development Company for Modern Web Applications

Senior React developers shipping hooks, Suspense, Server Components, and Next.js 15 for SaaS dashboards, headless commerce, and design systems. 11+ years in production, React 16 to 19, React Native mobile, full component library work.

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250+
React builds shipped
11+ yrs
Shipping React since 2015
95%
Client retention past 12 mo
4.9/5
From 2,495 reviews
Components /Button
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<Button variant="primary" />

Props

variantstring

"primary"

sizestring

"md"

loadingboolean

false

iconReactNode

<ChevronRight />

import { Button } from '@dz/ui';

export function Hero() {

return <Button variant="primary" />

}

// Sample component from a recent React 19 design-system project

React code shipped to production for these clients

  • Lean Space logo
  • Symphony logo
  • Marra Forni logo
  • Monarch logo
  • Focused Trading logo
  • Boston Beer logo
  • Arkadium logo
  • Farm Fetch logo

React development costs typically range from $25,000 for a small React SPA with one backend integration, up to $180,000 for a design system plus two product apps. SaaS dashboards with auth, payments, and real-time features run $60,000 to $120,000. Dedicated React developer rates start at $25 per hour or $2,800 per month for a senior. Decipher Zone replies to your brief within 1 business day and sends a fixed-price proposal in 5 business days.

Small React SPA
from $25,000
1 backend, 1-2 surfaces
SaaS dashboard
$60K to $120K
Auth, payments, real-time
Design system + apps
$80K to $180K
Storybook + 2 product apps
Dedicated developer
from $2,800/mo
Senior, monthly rolling

Stories · What we build

What can we build with React?

From greenfield React 19 builds to React Native mobile and headless commerce. Same senior team, same development discipline, same code review bar.

  • stories/build_01.stories.tsx

    Custom React Web Apps

    Greenfield React 19 builds with Suspense, Server Components, and Next.js 15 app router. SaaS products, healthcare portals, FinTech consoles.

    Ship: 4 to 6 mo
  • stories/build_02.stories.tsx

    SaaS Dashboards

    Multi-tenant dashboards with role-based access, real-time updates via WebSockets, data viz with Recharts or D3, and TanStack Query for server state.

    Tenants: 10 to 10K+
  • stories/build_03.stories.tsx

    Design Systems and Component Libraries

    Storybook-driven component libraries with strict TypeScript, accessibility primitives (Radix or React Aria), token-based theming, and visual regression tests.

    Storybook + Chromatic
  • stories/build_04.stories.tsx

    React Native Mobile

    Cross-platform iOS and Android from one React Native codebase. Expo or bare workflow, native modules when needed, App Store and Play Store release pipelines.

    iOS + Android
  • stories/build_05.stories.tsx

    Next.js SSR and SSG

    Server-side rendering, static generation, ISR, and edge runtime. Built for SEO, link previews, and sub-second LCP on commerce and content sites.

    Edge runtime ready
  • stories/build_06.stories.tsx

    Headless eCommerce

    React frontends on Shopify Storefront API, BigCommerce, Medusa, or commercetools. Custom checkout, A/B-tested product pages, sub-1s navigation.

    PLA ready

Addon registry · Hooks + features

Which React features and libraries do we use?

Eight React capabilities our senior developers wire up, ship, and maintain. Versions are what we use on greenfield projects today.

  • Hook

    useState + useReducer

    Local + complex state

    v

    19.0

    Component-level reactive state. We pick useReducer when state transitions get gnarly or when the same state is consumed in multiple components.

    Stable
  • Hook

    useEffect + useLayoutEffect

    Side effects

    v

    19.0

    Data fetching, subscriptions, integrations. Modern alternative: TanStack Query for server state, signals patterns for sync.

    Stable
  • Hook

    Suspense + use()

    Async rendering

    v

    19.0

    Suspense for data fetching and code splitting. The new use() hook for promises and context. Streaming SSR works out of the box.

    Stable
  • Hook

    Server Components

    RSC with Next.js 15

    v

    19.0

    React Server Components for zero-JS pages where possible. Smaller bundles, faster TTFB, better SEO. Async components by default.

    RSC
  • Hook

    useContext + Context

    Cross-component state

    v

    19.0

    Theme, auth, locale, feature flags. We avoid Context for high-frequency state (use Zustand or Jotai instead to avoid re-renders).

    Stable
  • Hook

    TanStack Query + Zustand

    Server + client state

    v

    5.0

    TanStack Query for server cache and mutations. Zustand for client UI state. Redux Toolkit when the team already speaks Redux.

    Stable
  • Hook

    React Hook Form + Zod

    Forms + validation

    v

    7.0

    Performant uncontrolled forms with schema-based validation. Zod schemas double as TypeScript types and runtime guards.

    Stable
  • Hook

    React Aria + Radix UI

    Accessible primitives

    v

    3.x

    Headless accessible primitives so our components pass WCAG 2.1 AA on first audit. Keyboard, screen reader, focus management included.

    Ready

8 of 8 primitives · All current as of React 19

Discuss your stack

Git log · Delivery pipeline

How does our React development process work?

Predictable, documented, audit-friendly. Procurement can scope it. Development can verify it.

  1. commit_01a3f8c91
    Day 0 to 1

    Brief review by senior React developer

    Send a short brief. A senior React developer reads it within one business day. No sales filter, no junior gatekeeping.

  2. commit_02b8d4e02
    Day 2 to 5

    Free component audit and proposal

    Free component audit covering React version, state strategy, SSR vs CSR, design system. Written proposal in 5 business days with milestones and rate band.

  3. commit_03c1e6f73
    Day 6 to 10

    Contract, NDA, repo provisioning

    Mutual NDA before code. SOW signed. Your GitHub repo provisioned with you as owner. Kickoff scheduled in your working hours.

  4. commit_04d2a7b14
    Sprint 0

    Vite or Next.js scaffold + CI/CD

    React project scaffolded with strict TypeScript, ESLint, Prettier, Storybook, Vitest, Playwright. Visual regression with Chromatic. CI/CD running on day one.

  5. commit_05e9b3c25
    Every sprint

    Two-week sprints, weekly demos

    Two-week sprints with public board. Weekly demos in your time zone. Code review on every PR. Lighthouse, bundle-size, and a11y checks on every build.

  6. commit_06f5d8e36
    Post-launch

    Production support and maintenance

    Optional support retainer. Same team. Same SLA. 95 percent of clients extend past 12 months. Storybook handover documentation included.

7-day no-risk trial on dedicated engagements

On dedicated React developer engagements, the first week is on us. If the fit is wrong, walk away with no fees, no notice period, no awkward exit clause.

Start with a brief

Engagement models · USD published

What engagement models do you offer for React development?

Transparent USD pricing. Rolling monthly cancel on dedicated. No setup fees, no markup, no surprises.

  • Hourly

    Pay only for hours used

    $25/hour

    Tracked weekly, billed monthly

    • Code reviews and audits
    • React performance tuning
    • Short surge work
    • No minimum commitment
    • Mutual NDA before brief
    Start hourly
  • Most popular

    Dedicated

    Senior React developer, full-time on your product

    $2,800/month

    Monthly rolling, cancel anytime

    • One developer, only you
    • Embedded in your sprint
    • Reports to your stakeholders
    • 7-day no-risk trial
    • 48-hour replacement guarantee
    Get a shortlist

  • Staff Aug

    Plug into your existing React team

    $2,500/month

    Per-developer monthly

    • Joins your standups
    • Your sprint, your tools
    • Your codebase, your repo
    • Scale up or down monthly
    • 48-hour replacement
    Augment my team

  • Fixed Scope

    Locked deliverables and timeline

    $25,000+ project

    Per-milestone payments

    • Best for MVPs and SPAs
    • Locked scope upfront
    • Locked timeline
    • Demo-based acceptance
    • No surprise change orders
    Get a quote

USD rate bands are indicative starting points. Final pricing depends on React version, seniority, and engagement length.

Production work

What have we built with React?

Four recent React engagements across SaaS aerospace, secure communications, B2B commerce, and FinTech trading. Real production, real metrics.

  • Lean Space logo

    Lean Space

    SaaS · Aerospace mission control

    LIVE

    React 18 + TypeScript front-end for cloud-native satellite operations and mission control. Real-time telemetry, mission planning, and ground-station integration.

    Components
    180+
    in Storybook
    LCP
    1.1 s
    p75 mobile
    Test coverage
    78%
    lines + branches
    Visit Lean Space
  • Symphony logo

    Symphony

    Secure communications SaaS

    LIVE

    React front-end for messaging, voice, video, and analytics modules used by global financial institutions with strict compliance requirements.

    Bundle
    142 KB
    initial chunk
    Test coverage
    82%
    lines + branches
    Release cycle
    weekly
    to production
    Visit Symphony
  • Marra Forni logo

    Marra Forni

    B2B eCommerce · Wood-fired ovens

    LIVE

    React storefront with custom dealer pricing, configurator for oven specs, and integrated CMS. Headless commerce on Laravel back-end.

    LCP
    1.3 s
    from 4.2 s
    Conv. uplift
    +22%
    post launch
    Dealer portals
    12
    active
    Visit Marra Forni
  • Focused Trading logo

    Focused Trading

    FinTech · Trading platform

    LIVE

    React + Node platform for prop trading firms. Real-time charts with TradingView, risk dashboards, payout automation, multi-tenant.

    WebSocket
    <50ms
    tick latency
    Uptime
    99.95%
    12 mo rolling
    Tenants
    8+
    live programmes
    Visit Focused Trading
Frequently Asked

React questions development leaders actually ask

Rate bands, version recommendations, state strategy, performance, and the awkward procurement questions, answered up front.

  • What does it cost to build a React app?

    Small React SPAs with one backend integration start around $25,000. SaaS dashboards with auth, payments, and real-time features run $60,000 to $120,000. Design system plus two product apps lands $80,000 to $180,000. Dedicated React developer rates start at $25 per hour or $2,800 per month for a senior. We send fixed-price proposals within 5 business days of your written brief.

  • Which React version and meta-framework should I use?

    React 19 with Next.js 15 (app router) for almost everything new. Server Components for zero-JS pages where possible. Vite + React Router for SPAs that do not need SSR. We avoid Create React App entirely. If your team is already on React 18 with Next.js 14, those are fine to keep.

  • Can you build React Native mobile too, or web only?

    Both. We pair React on web with React Native on mobile so most code patterns transfer. Expo for fast greenfield builds, bare workflow when you need custom native modules. iOS App Store and Google Play release pipelines included.

  • Do you build component libraries and design systems?

    Yes. Storybook-driven libraries with strict TypeScript, accessibility primitives (Radix UI or React Aria), token-based theming, visual regression tests with Chromatic, and Tailwind or CSS-in-JS as your team prefers. We ship libraries that consuming app teams can adopt without ceremony.

  • How do you handle React state management?

    Server state with TanStack Query. Client UI state with Zustand or Jotai. Forms with React Hook Form plus Zod. Redux Toolkit when the team already speaks Redux. Context is for low-frequency state like theme and auth. We pick the tool for the complexity, not the trend.

  • What about React performance and Core Web Vitals?

    We target Lighthouse 90+ on production. LCP under 1.2s for hero pages, CLS near zero, TBT close to zero. We use Server Components or SSG to avoid hydration where possible, lazy-load below-the-fold work with Suspense, ship lean bundles via route-level code splitting, and measure with real user monitoring.

  • Why hire Decipher Zone for React development?

    Ten plus years shipping React since version 0.14 in 2015. 250+ projects in production. 95 percent client retention past 12 months. ISO 9001 certified, NDA signed on request, source code in your repository from day one, 7-day no-risk trial on dedicated developer engagements. Senior developers on every project.

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  • Source code in your repo from day one
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