React Dashboard Rebuild for a Healthcare Analytics Platform

About the project

A European Series-B healthtech analytics scale-up came to us with a React dashboard that had grown unwieldy over four years of incremental patching. Data panels were slow to render, the component tree was deeply nested, and new clinical metrics took weeks to surface. This react dashboard rebuild example shows how we restructured the frontend in React with a shared design system, cutting load time sharply and giving the product team a stable base to ship from.

Background

The healthtech client had assembled the dashboard organically: each new data category added its own component subtree, its own data-fetching logic, and its own styling layer. By the time we started, the bundle was over 1.8 MB uncompressed, LCP was above four seconds on a mid-range device, and the engineering team spent more time debugging cross-component state than building features. Healthcare analytics data also has strict display requirements. Visualizations must be accurate and render without layout shift, since clinicians act on what they see.

Hire a Frontend Team That Has Done This Before
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We modernize React dashboards and data-heavy frontends for scale-ups that need speed without a rewrite from zero.

What we built

A modular, performant React dashboard frontend that gives the healthtech team a clear react dashboard rebuild example to build on.

Composable component library Icon

Composable component library

We replaced 200-plus bespoke components with roughly 80 composable Radix-based primitives. New metric panels now assemble from existing parts rather than starting from scratch.

Per-panel data caching Icon

Per-panel data caching

React Query replaced manual fetch logic throughout the dashboard. Each panel caches its own data independently, so navigating between views no longer triggers full page refreshes.

Route-level code splitting Icon

Route-level code splitting

We split the bundle by dashboard section using dynamic imports. The initial JavaScript payload dropped by more than half, and rarely used admin sections load only when visited.

Progressive rollout via feature flags Icon

Progressive rollout via feature flags

Every modernized section shipped behind a feature flag. The team could test with a subset of users, measure real-world performance, and roll back if anything looked off before full release.

Takeaway

This react dashboard rebuild example shows that modernizing a data-heavy frontend does not require a full rewrite. The key is separating state management from rendering concerns, introducing a composable component layer, and delivering improvements incrementally so the product team keeps shipping throughout. A European Series-B healthtech client with four years of accumulated frontend debt went from a bloated single bundle to a split, cacheable, maintainable dashboard in one quarter. That is the pattern we repeat for analytics-heavy products at scale.

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