diff --git a/ui/src/pages/DashboardPage.tsx b/ui/src/pages/DashboardPage.tsx
index 00ff2a0..62b8a92 100644
--- a/ui/src/pages/DashboardPage.tsx
+++ b/ui/src/pages/DashboardPage.tsx
@@ -1,3 +1,221 @@
-export function DashboardPage() {
-  return <div>Dashboard</div>;
+import React, { useState, useCallback, useEffect } from 'react';
+import { useNavigate } from 'react-router-dom';
+import {
+  Badge,
+  Button,
+  Card,
+  EmptyState,
+  KpiStrip,
+  Spinner,
+} from '@cameleer/design-system';
+import { useAuthStore } from '../auth/auth-store';
+import { useTenant, useEnvironments, useApps } from '../api/hooks';
+import { RequirePermission } from '../components/RequirePermission';
+import type { EnvironmentResponse, AppResponse } from '../types/api';
+
+// Helper: fetches apps for one environment and reports data upward via effect
+function EnvApps({
+  environment,
+  onData,
+}: {
+  environment: EnvironmentResponse;
+  onData: (envId: string, apps: AppResponse[]) => void;
+}) {
+  const { data } = useApps(environment.id);
+  useEffect(() => {
+    if (data) {
+      onData(environment.id, data);
+    }
+  }, [data, environment.id, onData]);
+  return null;
 }
+
+function tierColor(tier: string): 'primary' | 'success' | 'warning' | 'error' {
+  switch (tier?.toLowerCase()) {
+    case 'enterprise': return 'success';
+    case 'pro': return 'primary';
+    case 'starter': return 'warning';
+    default: return 'primary';
+  }
+}
+
+export function DashboardPage() {
+  const navigate = useNavigate();
+  const tenantId = useAuthStore((s) => s.tenantId);
+
+  const { data: tenant, isLoading: tenantLoading } = useTenant(tenantId ?? '');
+  const { data: environments, isLoading: envsLoading } = useEnvironments(tenantId ?? '');
+
+  // Collect apps per environment using a ref-like approach via state + callback
+  const [appsByEnv, setAppsByEnv] = useState<Record<string, AppResponse[]>>({});
+
+  const handleAppsData = useCallback((envId: string, apps: AppResponse[]) => {
+    setAppsByEnv((prev) => {
+      if (prev[envId] === apps) return prev; // stable reference, no update
+      return { ...prev, [envId]: apps };
+    });
+  }, []);
+
+  const allApps = Object.values(appsByEnv).flat();
+  const runningApps = allApps.filter((a) => a.currentDeploymentId !== null);
+  // "Failed" is apps that have a previous deployment but no current (stopped) — approximate heuristic
+  const failedApps = allApps.filter(
+    (a) => a.currentDeploymentId === null && a.previousDeploymentId !== null,
+  );
+
+  const isLoading = tenantLoading || envsLoading;
+
+  const kpiItems = [
+    {
+      label: 'Environments',
+      value: environments?.length ?? 0,
+      subtitle: 'isolated runtime contexts',
+    },
+    {
+      label: 'Total Apps',
+      value: allApps.length,
+      subtitle: 'across all environments',
+    },
+    {
+      label: 'Running',
+      value: runningApps.length,
+      trend: {
+        label: 'active deployments',
+        variant: 'success' as const,
+      },
+    },
+    {
+      label: 'Stopped',
+      value: failedApps.length,
+      trend: failedApps.length > 0
+        ? { label: 'need attention', variant: 'warning' as const }
+        : { label: 'none', variant: 'muted' as const },
+    },
+  ];
+
+  if (isLoading) {
+    return (
+      <div className="flex items-center justify-center h-64">
+        <Spinner />
+      </div>
+    );
+  }
+
+  if (!tenantId) {
+    return (
+      <EmptyState
+        title="No tenant associated"
+        description="Your account is not linked to a tenant. Please contact your administrator."
+      />
+    );
+  }
+
+  return (
+    <div className="space-y-6 p-6">
+      {/* Tenant Header */}
+      <div className="flex items-center justify-between">
+        <div className="flex items-center gap-3">
+          <h1 className="text-2xl font-semibold text-white">
+            {tenant?.name ?? tenantId}
+          </h1>
+          {tenant?.tier && (
+            <Badge
+              label={tenant.tier.toUpperCase()}
+              color={tierColor(tenant.tier)}
+            />
+          )}
+        </div>
+        <div className="flex items-center gap-2">
+          <RequirePermission permission="apps:manage">
+            <Button
+              variant="secondary"
+              size="sm"
+              onClick={() => navigate('/environments/new')}
+            >
+              New Environment
+            </Button>
+          </RequirePermission>
+          <Button
+            variant="primary"
+            size="sm"
+            onClick={() => navigate('/dashboard')}
+          >
+            View Observability Dashboard
+          </Button>
+        </div>
+      </div>
+
+      {/* KPI Strip */}
+      <KpiStrip items={kpiItems} />
+
+      {/* Environments overview */}
+      {environments && environments.length > 0 ? (
+        <Card title="Environments">
+          {/* Render hidden data-fetchers for each environment */}
+          {environments.map((env) => (
+            <EnvApps key={env.id} environment={env} onData={handleAppsData} />
+          ))}
+          <div className="divide-y divide-white/10">
+            {environments.map((env) => {
+              const envApps = appsByEnv[env.id] ?? [];
+              const envRunning = envApps.filter((a) => a.currentDeploymentId !== null).length;
+              return (
+                <div
+                  key={env.id}
+                  className="flex items-center justify-between py-3 first:pt-0 last:pb-0 cursor-pointer hover:bg-white/5 px-2 rounded"
+                  onClick={() => navigate(`/environments/${env.id}`)}
+                >
+                  <div className="flex items-center gap-3">
+                    <span className="text-sm font-medium text-white">
+                      {env.displayName}
+                    </span>
+                    <Badge
+                      label={env.slug}
+                      color="primary"
+                      variant="outlined"
+                    />
+                  </div>
+                  <div className="flex items-center gap-4 text-sm text-white/60">
+                    <span>{envApps.length} apps</span>
+                    <span className="text-green-400">{envRunning} running</span>
+                    <Badge
+                      label={env.status}
+                      color={env.status === 'ACTIVE' ? 'success' : 'warning'}
+                    />
+                  </div>
+                </div>
+              );
+            })}
+          </div>
+        </Card>
+      ) : (
+        <EmptyState
+          title="No environments yet"
+          description="Create your first environment to get started deploying Camel applications."
+          action={
+            <RequirePermission permission="apps:manage">
+              <Button variant="primary" onClick={() => navigate('/environments/new')}>
+                Create Environment
+              </Button>
+            </RequirePermission>
+          }
+        />
+      )}
+
+      {/* Recent deployments placeholder */}
+      <Card title="Recent Deployments">
+        {allApps.length === 0 ? (
+          <EmptyState
+            title="No deployments yet"
+            description="Deploy your first app to see deployment history here."
+          />
+        ) : (
+          <p className="text-sm text-white/60">
+            Select an app from an environment to view its deployment history.
+          </p>
+        )}
+      </Card>
+    </div>
+  );
+}
+