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React agency for resilient product teams

Component architecture, state strategies, DX — React that scales with you

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Targets in the field: INP P75 < 200 ms · stable deployments · measurable DX improvements

Trusted by clients across the DACH region

Scaled React setups in SaaS, insurance, media & events

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Frequently asked questions to a React agency

Answers on architecture, state strategies, performance, SEO and team enablement. Project specifics are best discussed in a 30-minute tech check — incl. first recommendations.

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Depends on starting point and goals. Common entry: code/performance audit (fixed price), then two-week sprints or retainer. Ballparks (non-binding): Audit €1.2–3.5k, refactoring sprint €8–15k, MVP 6–10 weeks. We plan with a 30/60/90-day roadmap, clear DoD and measurable KPIs (e.g., INP/LCP targets, defect rate, lead time).

  1. Discovery & codebase scan (profiling, bundle/render costs, DX bottlenecks)
  2. Blueprint (component boundaries, state strategy, data layer, test plan)
  3. Hardening sprint (top levers: INP/LCP, architecture fixes, CI)
  4. Feature delivery (canary rollouts, observability, A/B tests)

First improvements typically go live in 2–4 weeks; an MVP in 6–10 weeks.

Often yes. React 19 brings Actions, useActionState, useOptimistic, the use API (suspends during render), new form APIs in react-dom (useFormStatus), ref as a prop, <Context> as provider, improved hydration error diffs and stable RSC. Approach: check compatibility, enable Transitions/Actions step-by-step, guard with INP/LCP watchers, rollout via feature flags

We decide per page type/flow:

  • CSR for internal/app-only UIs (no SEO need, heavy interaction)
  • SSR/streaming for SEO-relevant, personalized or frequently updated content
  • SSG/ISR for landing/docs/category with controlled freshness

We build a rendering matrix (SEO, freshness, personalization, cost) and set cache/revalidation rules.

Server state ≠ client state.

  • Server state: React Query (cache, revalidate, mutations)
  • Client state: Zustand/RTK depending on complexity; forms separate (controller/schema)
    Guardrails: minimal re-renders, selector-based access, decoupled side-effects, clear cross-cutting concerns (auth/feature flags/tracking).

  • LCP: correct sizes for hero image, AVIF/WebP, single priority, preconnect/preload, critical CSS
  • INP: event decoupling (transitions), selective/lazy hydration, virtualization, debounce/throttle, split heavy listeners
  • JS budget: code-splitting, no heavy UI libs above the fold, strict third-party budget

Measurement: profiling + RUM (targets: INP P75 < 200 ms, LCP < 2.5 s).

Yes — with the right rendering strategy. Essentials: meaningful routes, meta/schema server-side or pre-rendered, internal linking, i18n/hreflang, fast CWV. For content teams we integrate headless CMS (previews, roles/permissions) and clean content modeling.

You can find more technical details in our React consulting solution.

A KPI set per goal:

  • Productivity/DX: lead time, deployment frequency, change failure rate
  • Quality: defect rate, e2e pass rate, error budget
  • Business: conversion/CTR, time-to-publish, SEO visibility

We report monthly, prioritize by impact/effort, and tie tasks to metric goals (e.g., INP −30 %, lead time −20 %).

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Depends on starting point and goals. Common entry: code/performance audit (fixed price), then two-week sprints or retainer. Ballparks (non-binding): Audit €1.2–3.5k, refactoring sprint €8–15k, MVP 6–10 weeks. We plan with a 30/60/90-day roadmap, clear DoD and measurable KPIs (e.g., INP/LCP targets, defect rate, lead time).

  1. Discovery & codebase scan (profiling, bundle/render costs, DX bottlenecks)
  2. Blueprint (component boundaries, state strategy, data layer, test plan)
  3. Hardening sprint (top levers: INP/LCP, architecture fixes, CI)
  4. Feature delivery (canary rollouts, observability, A/B tests)

First improvements typically go live in 2–4 weeks; an MVP in 6–10 weeks.

Often yes. React 19 brings Actions, useActionState, useOptimistic, the use API (suspends during render), new form APIs in react-dom (useFormStatus), ref as a prop, <Context> as provider, improved hydration error diffs and stable RSC. Approach: check compatibility, enable Transitions/Actions step-by-step, guard with INP/LCP watchers, rollout via feature flags

We decide per page type/flow:

  • CSR for internal/app-only UIs (no SEO need, heavy interaction)
  • SSR/streaming for SEO-relevant, personalized or frequently updated content
  • SSG/ISR for landing/docs/category with controlled freshness

We build a rendering matrix (SEO, freshness, personalization, cost) and set cache/revalidation rules.

Server state ≠ client state.

  • Server state: React Query (cache, revalidate, mutations)
  • Client state: Zustand/RTK depending on complexity; forms separate (controller/schema)
    Guardrails: minimal re-renders, selector-based access, decoupled side-effects, clear cross-cutting concerns (auth/feature flags/tracking).

  • LCP: correct sizes for hero image, AVIF/WebP, single priority, preconnect/preload, critical CSS
  • INP: event decoupling (transitions), selective/lazy hydration, virtualization, debounce/throttle, split heavy listeners
  • JS budget: code-splitting, no heavy UI libs above the fold, strict third-party budget

Measurement: profiling + RUM (targets: INP P75 < 200 ms, LCP < 2.5 s).

Yes — with the right rendering strategy. Essentials: meaningful routes, meta/schema server-side or pre-rendered, internal linking, i18n/hreflang, fast CWV. For content teams we integrate headless CMS (previews, roles/permissions) and clean content modeling.

You can find more technical details in our React consulting solution.

A KPI set per goal:

  • Productivity/DX: lead time, deployment frequency, change failure rate
  • Quality: defect rate, e2e pass rate, error budget
  • Business: conversion/CTR, time-to-publish, SEO visibility

We report monthly, prioritize by impact/effort, and tie tasks to metric goals (e.g., INP −30 %, lead time −20 %).

Depends on starting point and goals. Common entry: code/performance audit (fixed price), then two-week sprints or retainer. Ballparks (non-binding): Audit €1.2–3.5k, refactoring sprint €8–15k, MVP 6–10 weeks. We plan with a 30/60/90-day roadmap, clear DoD and measurable KPIs (e.g., INP/LCP targets, defect rate, lead time).

Depends on starting point and goals. Common entry: code/performance audit (fixed price), then two-week sprints or retainer. Ballparks (non-binding): Audit €1.2–3.5k, refactoring sprint €8–15k, MVP 6–10 weeks. We plan with a 30/60/90-day roadmap, clear DoD and measurable KPIs (e.g., INP/LCP targets, defect rate, lead time).

  1. Discovery & codebase scan (profiling, bundle/render costs, DX bottlenecks)
  2. Blueprint (component boundaries, state strategy, data layer, test plan)
  3. Hardening sprint (top levers: INP/LCP, architecture fixes, CI)
  4. Feature delivery (canary rollouts, observability, A/B tests)

First improvements typically go live in 2–4 weeks; an MVP in 6–10 weeks.

  1. Discovery & codebase scan (profiling, bundle/render costs, DX bottlenecks)
  2. Blueprint (component boundaries, state strategy, data layer, test plan)
  3. Hardening sprint (top levers: INP/LCP, architecture fixes, CI)
  4. Feature delivery (canary rollouts, observability, A/B tests)

First improvements typically go live in 2–4 weeks; an MVP in 6–10 weeks.

Often yes. React 19 brings Actions, useActionState, useOptimistic, the use API (suspends during render), new form APIs in react-dom (useFormStatus), ref as a prop, <Context> as provider, improved hydration error diffs and stable RSC. Approach: check compatibility, enable Transitions/Actions step-by-step, guard with INP/LCP watchers, rollout via feature flags

Often yes. React 19 brings Actions, useActionState, useOptimistic, the use API (suspends during render), new form APIs in react-dom (useFormStatus), ref as a prop, <Context> as provider, improved hydration error diffs and stable RSC. Approach: check compatibility, enable Transitions/Actions step-by-step, guard with INP/LCP watchers, rollout via feature flags

We decide per page type/flow:

  • CSR for internal/app-only UIs (no SEO need, heavy interaction)
  • SSR/streaming for SEO-relevant, personalized or frequently updated content
  • SSG/ISR for landing/docs/category with controlled freshness

We build a rendering matrix (SEO, freshness, personalization, cost) and set cache/revalidation rules.

We decide per page type/flow:

  • CSR for internal/app-only UIs (no SEO need, heavy interaction)
  • SSR/streaming for SEO-relevant, personalized or frequently updated content
  • SSG/ISR for landing/docs/category with controlled freshness

We build a rendering matrix (SEO, freshness, personalization, cost) and set cache/revalidation rules.

  • LCP: correct sizes for hero image, AVIF/WebP, single priority, preconnect/preload, critical CSS
  • INP: event decoupling (transitions), selective/lazy hydration, virtualization, debounce/throttle, split heavy listeners
  • JS budget: code-splitting, no heavy UI libs above the fold, strict third-party budget

Measurement: profiling + RUM (targets: INP P75 < 200 ms, LCP < 2.5 s).

  • LCP: correct sizes for hero image, AVIF/WebP, single priority, preconnect/preload, critical CSS
  • INP: event decoupling (transitions), selective/lazy hydration, virtualization, debounce/throttle, split heavy listeners
  • JS budget: code-splitting, no heavy UI libs above the fold, strict third-party budget

Measurement: profiling + RUM (targets: INP P75 < 200 ms, LCP < 2.5 s).

Depends on starting point and goals. Common entry: code/performance audit (fixed price), then two-week sprints or retainer. Ballparks (non-binding): Audit €1.2–3.5k, refactoring sprint €8–15k, MVP 6–10 weeks. We plan with a 30/60/90-day roadmap, clear DoD and measurable KPIs (e.g., INP/LCP targets, defect rate, lead time).

Depends on starting point and goals. Common entry: code/performance audit (fixed price), then two-week sprints or retainer. Ballparks (non-binding): Audit €1.2–3.5k, refactoring sprint €8–15k, MVP 6–10 weeks. We plan with a 30/60/90-day roadmap, clear DoD and measurable KPIs (e.g., INP/LCP targets, defect rate, lead time).

  1. Discovery & codebase scan (profiling, bundle/render costs, DX bottlenecks)
  2. Blueprint (component boundaries, state strategy, data layer, test plan)
  3. Hardening sprint (top levers: INP/LCP, architecture fixes, CI)
  4. Feature delivery (canary rollouts, observability, A/B tests)

First improvements typically go live in 2–4 weeks; an MVP in 6–10 weeks.

  1. Discovery & codebase scan (profiling, bundle/render costs, DX bottlenecks)
  2. Blueprint (component boundaries, state strategy, data layer, test plan)
  3. Hardening sprint (top levers: INP/LCP, architecture fixes, CI)
  4. Feature delivery (canary rollouts, observability, A/B tests)

First improvements typically go live in 2–4 weeks; an MVP in 6–10 weeks.

Often yes. React 19 brings Actions, useActionState, useOptimistic, the use API (suspends during render), new form APIs in react-dom (useFormStatus), ref as a prop, <Context> as provider, improved hydration error diffs and stable RSC. Approach: check compatibility, enable Transitions/Actions step-by-step, guard with INP/LCP watchers, rollout via feature flags

Often yes. React 19 brings Actions, useActionState, useOptimistic, the use API (suspends during render), new form APIs in react-dom (useFormStatus), ref as a prop, <Context> as provider, improved hydration error diffs and stable RSC. Approach: check compatibility, enable Transitions/Actions step-by-step, guard with INP/LCP watchers, rollout via feature flags

We decide per page type/flow:

  • CSR for internal/app-only UIs (no SEO need, heavy interaction)
  • SSR/streaming for SEO-relevant, personalized or frequently updated content
  • SSG/ISR for landing/docs/category with controlled freshness

We build a rendering matrix (SEO, freshness, personalization, cost) and set cache/revalidation rules.

We decide per page type/flow:

  • CSR for internal/app-only UIs (no SEO need, heavy interaction)
  • SSR/streaming for SEO-relevant, personalized or frequently updated content
  • SSG/ISR for landing/docs/category with controlled freshness

We build a rendering matrix (SEO, freshness, personalization, cost) and set cache/revalidation rules.

  • LCP: correct sizes for hero image, AVIF/WebP, single priority, preconnect/preload, critical CSS
  • INP: event decoupling (transitions), selective/lazy hydration, virtualization, debounce/throttle, split heavy listeners
  • JS budget: code-splitting, no heavy UI libs above the fold, strict third-party budget

Measurement: profiling + RUM (targets: INP P75 < 200 ms, LCP < 2.5 s).

  • LCP: correct sizes for hero image, AVIF/WebP, single priority, preconnect/preload, critical CSS
  • INP: event decoupling (transitions), selective/lazy hydration, virtualization, debounce/throttle, split heavy listeners
  • JS budget: code-splitting, no heavy UI libs above the fold, strict third-party budget

Measurement: profiling + RUM (targets: INP P75 < 200 ms, LCP < 2.5 s).