Hydration-Optimized React Architectures 

Server Components that eliminate client-side JavaScript. Streaming SSR that doesn't block render. TTI < 1s or your money back. Zero hydration errors.

<100ms FCP (First Contentful Paint)
0 Hydration Errors
Architecture Audit View Technologies
Scroll

Service Deliverables

What you receive. No ambiguity.

Next.js 14 architecture with App Router and RSC
Documented design system in Storybook
TypeScript strict with zero any
E2E testing with Playwright
CI/CD configured (GitHub Actions)
Training for your development team

Executive Summary

For Management.

React development generates ROI through conversion improvement: each second less of load time equals +7% conversion. Typical project of 8-14 weeks depending on complexity.

Requirement: team with basic JavaScript knowledge. Main risk: learning curve if migrating from another framework. The code is yours from day one, with complete documentation.

+7% Conversion/Second
8-14 wks Typical Project
100% Code Yours

Technical Summary

For the CTO.

Base stack: Next.js 14 App Router with React Server Components. State management with Zustand + TanStack Query. TypeScript 5.4 strict mode mandatory.

Testing with Vitest (unit) + Playwright (E2E). Monorepo with Turborepo if applicable. Deploy on Vercel or own infrastructure (Docker) with servers in Europe.

Is It For You?

React is for complex, interactive interfaces.

Who it's for

  • Teams building complex, interactive web applications.
  • Projects with strict performance requirements (Core Web Vitals).
  • Organizations with established JavaScript/TypeScript ecosystem.
  • SaaS products with rich interfaces and complex state.
  • E-commerce where TTI directly impacts conversion.

Who it's not for

  • Static content sites where Astro or plain HTML suffices.
  • Projects with frontend budget under €15,000.
  • Teams without experienced JavaScript developers (extra training required).
  • MVPs where development speed trumps performance requirements.
  • Simple corporate websites without complex interactivity.

Architectures We Implement

Patterns for specific scenarios.

01

Streaming SSR + Suspense

Server sends HTML progressively while resolving data. Suspense boundaries allow UI parts to render before others. TTFB < 100ms even with slow queries.

02

Partial Pre-rendering (PPR)

Static shell cached on CDN + dynamic slots resolved at request time. Best of static and dynamic rendering. Next.js 14 experimental.

03

Islands Architecture

Static content by default, interactive islands where needed. Zero JavaScript until user interacts. Ideal for content-heavy sites with critical SEO.

04

Monorepo With Design System

Turborepo + shared packages. UI library in Storybook. Shared types between frontend and backend. One change in design system updates all apps.

Development Process

From Figma to production without improvisation.

01

ADRs (Architecture Decision Records)

We document every technical decision: rendering strategy, state management, data fetching patterns. Version-controlled ADRs in the repo.

02

Component-Driven Development

Components in isolation with Storybook. Props typed with Zod. Visual regression tests with Chromatic. Zero side effects.

03

Integration and Performance

Data layer with TanStack Query. Optimistic updates. Prefetching. Bundle analysis on every PR. Performance budget enforced in CI.

04

E2E and Deployment

Playwright tests in CI. Preview deployments on Vercel. Feature flags for gradual rollout. Tracking with Vercel Analytics + Sentry.

Risks and Mitigation

Transparency about what can go wrong.

Memory leaks

Mitigación:

WeakRefs, AbortControllers, profiling with Chrome DevTools on every release. Strict cleanup patterns.

Vercel dependency

Mitigación:

Docker as fallback, documented self-hosting, portable architecture without vendor lock-in.

Learning curve

Mitigación:

Training included, pair programming, exhaustive documentation for your team.

Over-engineering

Mitigación:

ADRs with justification, architecture reviews, YAGNI principle enforced on every decision.

Memory Leaks: The Silent Killer

Your app loses 10MB every minute. And you don't know it.

Uncleaned event listeners. Uncancelled subscriptions. Closures retaining references. 80% of React apps have memory leaks that progressively degrade performance. We use WeakRefs, AbortControllers, and strict cleanup patterns. Profiling with Chrome DevTools on every release.

hooks/useAbortableFetch.ts
// Anti-leak pattern with AbortController
export function useAbortableFetch<T>(url: string) {
const [data, setData] = useState<T | null>(null);
useEffect(() => {
const controller = new AbortController();
fetch(url, { signal: controller.signal })
.then(r => r.json()).then(setData);
return () => controller.abort();
}, [url]);
return data;
}
0 Leaks
100% Cleanup
Stable Heap

Enterprise React Specialists

We're not an agency that "sets up WordPress". We've been building high-performance web applications for 15 years. React since 2015, Next.js since its first version. Architectures that scale to millions of users.

15+ Years of Experience
100+ Lighthouse Score
75+ Bundle Reduction vs. Average
100+ Fixed-Rate Projects

Technical Questions

What Engineering Leads ask.

Why Next.js and not Remix or Astro?

Next.js has the most mature ecosystem, best Vercel support, and 90% of job postings ask for Next.js. Remix excels for mutation-heavy apps. Astro for content sites with minimal JS. We choose based on the case, but Next.js is the safe default for enterprise projects.

How do you handle global state?

Zustand for simple client state (~2KB). TanStack Query for server state (cache, revalidation, optimistic updates). Context only for theme/locale. Redux only if the project already uses it. The trend is to minimize global state.

React 19 in production?

We use stable React 19 RC features (useOptimistic, useTransition improvements). Actions and form handling when stabilized. Nothing experimental in production. Gradual upgrade with codemods.

What's your stance on CSS-in-JS?

Tailwind CSS. Runtime CSS-in-JS (styled-components, Emotion) adds ~12KB and penalizes hydration. Tailwind is zero-runtime, tree-shakeable, and the de facto standard. For complex components, CSS Modules.

How do you connect with Node.js or Python backends?

For Node.js: tRPC for end-to-end type safety, or REST/GraphQL with generated types. For Python FastAPI: OpenAPI spec with automatic typed client generation. Data flows with synchronized types and zero runtime surprises.

What are the risks of migrating to React/Next.js?

Learning curve if coming from Vue/Angular. Possible Vercel dependency (mitigatable with Docker). Incremental migration with Module Federation or microfrontends. We train teams during transition. Rollback plan always documented.

Do you work with international companies?

Yes, we're a React agency with 15+ years of experience. We work with clients across Europe and the Americas. Video conference meetings available.

What if it doesn't work?

The code is yours from day one. If you're not satisfied, you can hire another team. No lock-in. We document everything to facilitate transition if necessary.

Does Your Web Feel Slow?

Free Core Web Vitals audit. We identify exactly which script is blocking your main thread. No commitment.

Request Audit
✓ No commitment ✓ Response in 24h ✓ Custom proposal
Last updated: February 2026

Technical
Initial Audit.

AI, security and performance. Diagnosis with phased proposal.

NDA available
Response <24h
Phased proposal

Your first meeting is with a Solutions Architect, not a salesperson.

Request diagnosis