Modernizing Your Tech Stack with React SPA

Discover your optimal React architecture and migration cost — before you refactor a line.

Most modern SPAs slow down as they scale — page loads stretch, bundles swell, and the UI becomes harder to evolve. We rebuild from the core: optimizing architecture with React Server Components, modular boundaries, and edge-first deployment, so your product keeps its speed as your business grows.

Here’s how we do it:

• Current stack audit. We evaluate your frontend and backend architecture, measure bundle size, and service-to-client latency. Real-user metrics (LCP, INP, TTFB) shape our audit baseline.
• Target architecture design. We design a future-ready architecture that keeps your frontend fast and scalable, built on React Server Components and hybrid rendering to deliver instant load times and long-term flexibility.
• Micro-frontends & BFF strategy. We assess feasibility of micro-frontend adoption (Single-SPA / Module Federation), suggest BFF/GraphQL layers for secure data access and UI personalization.
• Deployment platform selection. We benchmark Vercel, Netlify, and Cloudflare Pages across latency, cost per 1K requests, and edge footprint, providing clear insights for deploying a React app efficiently.
• Architecture artifacts. You receive ADRs, data flow diagrams, routing maps, and a modular migration roadmap aligned to your team’s release cycles.

We build the system your team will want to maintain, where each module has a place, and performance is a first principle for those who aim to create a SPA that scales seamlessly.

Modernize a high-impact route next to legacy — prove metrics before scaling.

Fragmented SPAs slow you down, especially when React SPA routing grows unstructured. As apps expand, performance tanks: bundle sizes inflate, rendering stalls, and backend coordination becomes a bottleneck. We audit your entire architecture — frontend and backend — to surface root issues, and we design a modular, measurable system that runs lean on the edge.

Here’s how we do it:

• Full-stack architecture audit. We run a full diagnostic across your frontend, backend, and integration layers to refine React SPA routing, analyze how data moves, and pinpoint where latency builds up. We analyze critical metrics (LCP, INP, TTFB) and extract architectural pain points — nested layouts, state over-fetching, dead code, tight coupling between UI and APIs.
• Hybrid rendering with RSC & streaming. We define a rendering model around React Server Components and HTML streaming, optimizing what runs on the server vs. the client. The outcome: smaller JS bundles, faster Time-To-First-Byte, and more responsive interactions.
• Micro-frontend readiness. We evaluate where to draw clean module boundaries using Single-SPA or Module Federation. We design a secure backend-for-frontend layer that manages personalization, token flow, and data aggregation, forming the backbone of a single page application template that reduces frontend complexity and speeds up feature delivery.
• Deploy-to-edge strategy. We assess your hosting options — Vercel, Netlify, Cloudflare — and provide a clear roadmap to deploy React app infrastructure optimized for routing complexity, traffic patterns, SSR needs, and latency tolerance.
• Architecture deliverables. We produce actionable architecture artifacts: ADRs for major decisions, data flow diagrams, streaming/rendering schemas, routing hierarchy, and a migration map broken down by module and feature. This becomes your north star for implementation.

Every architecture decision should leave your team faster, your code lighter, and your UX smoother. We make that measurable — not aspirational.

Standardize UI, enforce accessibility, and reduce duplicate work across teams. We build a platform layer that standardizes how your team designs, builds, and delivers UI — fast, accessible, and reusable by default.

Here’s how we do it:

• Cross-platform design tokens. We define semantic tokens for color, spacing, typography, motion, delivered as a versioned package, synced with Figma and your codebase.
• Component catalog with Storybook & Radix. We create a headless SPA library using Tailwind and Radix, documented and visually tested in Storybook. Every component is accessible, responsive, and design-token aware.
• Project structure. We enforce feature-based structure, isolate state and data fetching, and guide shared utility design, so teams can onboard and scale fast.
• Visual testing & documentation in CI. We set up visual regression pipelines, changelogs for components, and automated doc previews that integrate smoothly with React deploy workflows, making quality and reuse part of your delivery flow.
• Reuse tracking. We track component usage across the codebase, measure time-to-ship for new UI, and reduce duplicate effort across teams.

This isn’t just a typed API — it’s a performance contract that protects delivery speed and keeps backend changes from slowing your business down.

Modern SPAs break long before the stack does. Every millisecond counts — in 2025, React performance directly translates to conversions and revenue gained or lost on each interaction. We engineer your frontend to stay fast, even as your app grows — leveraging SPA sync principles for smaller bundles, faster streams, smarter hydration, and zero waste on the client.

Here’s how we do it:

• Budget-based splitting. We break down and budget your bundle. We split your JavaScript by route, feature, and component. Using RSC and dynamic imports, we move non-critical logic off the client and reduce time-to-interactivity across the board.
• HTML streaming & edge rendering. We implement HTML streaming and edge rendering. Your UI starts rendering before the server finishes thinking. With React Server Components and edge streaming, we optimize Time to First Byte and First Contentful Paint at the CDN level, ensuring compatibility with ASP .NET Core React SPA environments.
• Profiling and runtime optimization. Using Chrome DevTools, Lighthouse, and React Profiler, we diagnose list bottlenecks, hydration stalls, and layout shifts. For large datasets, we implement virtualization via react-window or react-virtual to keep paint time predictable.
• CI-integrated performance budgets. We set hard performance budgets. You get clear, enforceable budgets for LCP, INP, and TTFB — tracked in CI. These aren’t vague goals; they’re thresholds wired into your review process, so performance doesn’t erode over time.
• Compiler & build tuning. We bring the right tools at the right time. We swap slow compilers for Vite or SWC, and use the upcoming React Compiler when it adds value. No bleeding edge for the sake of it — just proven tools that cut build and runtime cost.

We make React SPA with service workers fast not just once — but every time you deploy. Because in 2025, performance is product.

Modern SPAs and microfrontends demand more than working code — they need automated, observable, secure delivery from the first PR to production. We build pipelines that scale with your architecture and protect your velocity — without sacrificing stability or security.

Here’s how we do it:

• Per-module CI/CD pipelines. We automate your pipelines per module. Each microfrontend or create React app SPA domain gets its own CI/CD pipeline — with GitHub Actions or GitLab CI — wired for linting, tests, builds, and deployment previews.
• Infrastructure-as-Code & rollout controls. We codify your infrastructure and environments. Using Terraform or CloudFormation, we provision environments reproducibly — from staging to prod — ensuring deployment consistency across any React single page application.
• Test pyramid with E2E coverage. We build a full test pyramid, not just happy paths. From unit tests to end-to-end flows, we implement coverage where it counts — and fail fast when things regress. Visual diffs, integration mocks, and stateful E2E flows are standard.
• Security wired into every push. We embed security checks into every build. We run static code analysis (SAST), dependency scanners (Dependabot, Snyk), and DAST tools (OWASP ZAP) on every push. You see vulnerabilities before they become incidents — and track fixes over time.
• Delivery metrics you can act on. We surface real deployment metrics. We measure MTTR, deploy frequency, test coverage, and vulnerability count per release. These numbers become part of your delivery scorecard — tracked, improved, and visible.

This is where speed meets confidence. We don’t just build pipelines — we deliver React modernization services that turn your delivery process into a competitive edge.

Teams that migrate legacy app to React know the truth — React SPAs don’t fail in development, they fail in production. Slow metrics, silent crashes, edge outages, unpredictable bills — all symptoms of missing observability and weak deployment posture. We take full operational responsibility for your hosting, monitoring, and runtime behavior — a foundation for continuous React frontend modernization that lets your team ship without firefighting.

Here’s how we do it:

• Platform fit, benchmarked. Vercel, Netlify, or Cloudflare Pages — we evaluate your load profile, latency targets, SSR requirements, and budget. You get a platform recommendation backed by data, and a production setup optimized for scale.
• End-to-end tracing. We implement logging and distributed tracing. From client logs to edge functions to backend APIs — every request is traced with correlation IDs. Logs are structured, searchable, and wired to alerting systems. When something breaks, you’ll know where and when.
• Live UX metrics. We monitor real user performance — not lab scores. Core Web Vitals (LCP, INP, CLS) are tracked in real time. Alerts trigger when performance degrades, not when users complain.
• SLOs & runbooks. We define SLOs, SLIs, and incident playbooks. Your services get clear objectives and dashboards. For every failure scenario, there’s a runbook and escalation path. We operationalize reliability — and make it repeatable.
• Spend guardrails. We enforce cost and usage guardrails. You get real-time visibility into edge usage, bandwidth, and cold starts — with automated alerts before you overspend. Performance without budget chaos.

Your team won’t need to worry about latency, uptime, or observability debt — because we’ve already built the system that delivers the real benefits of React SPA performance and stability.