diff --git a/npm-packages/meteor-rspack/rspack.config.js b/npm-packages/meteor-rspack/rspack.config.js
index d937b08958..d983688611 100644
--- a/npm-packages/meteor-rspack/rspack.config.js
+++ b/npm-packages/meteor-rspack/rspack.config.js
@@ -766,11 +766,38 @@ module.exports = async function (inMeteor = {}, argv = {}) {
     ...loggingConfig,
   };
 
-  // Establish Angular overrides to ensure proper integration
+  // Establish Angular overrides to ensure proper integration.
+  // Angular's createConfig() from @nx/angular-rspack may overwrite the entire
+  // devServer block (webpack-merge does a shallow merge for devServer), losing
+  // critical settings like static.publicPath that the Meteor proxy relies on.
+  // Re-apply the full devServer config here so it's restored after the merge.
+  // TODO: Extract the devServer block into a shared helper to avoid duplicating
+  // it between clientConfig and angularExpandConfig. Blocked until we confirm
+  // this fix resolves the Angular 504 on CI.
   const angularExpandConfig = isAngularEnabled
     ? {
         mode: isProd ? "production" : "development",
-        devServer: { port: devServerPort },
+        ...(isDevEnvironment && {
+          devServer: {
+            ...createRemoteDevServerConfig(),
+            static: { directory: clientOutputDir, publicPath: "/__rspack__/" },
+            hot: true,
+            liveReload: true,
+            port: devServerPort,
+            devMiddleware: {
+              writeToDisk: (filePath) =>
+                /\.(html)$/.test(filePath) || filePath.endsWith('sw.js'),
+            },
+            onListening(devServer) {
+              if (!devServer) return;
+              const { host, port } = devServer.options;
+              const protocol =
+                devServer.options.server?.type === "https" ? "https" : "http";
+              const devServerUrl = `${protocol}://${host || "localhost"}:${port}`;
+              outputMeteorRspack({ devServerUrl });
+            },
+          },
+        }),
         stats: { preset: "normal" },
         infrastructureLogging: { level: "info" },
         ...(isProd && isClient && { output: { module: false } }),