diff --git a/.docker/app/Dockerfile b/.docker/app/Dockerfile
index 93e755ce52..63a0cb4f2d 100644
--- a/.docker/app/Dockerfile
+++ b/.docker/app/Dockerfile
@@ -433,6 +433,7 @@ COPY --from=build-preview-proxy /runtime-deps/node_modules ./apps/preview-proxy/
 COPY --from=github-cli /usr/bin/gh /usr/local/bin/gh
 RUN command -v git >/dev/null && command -v gh >/dev/null && \
   command -v opencode >/dev/null && \
+  test -f /roomote/apps/bullmq/dist/xhr-sync-worker.js && \
   cd /roomote/apps/bullmq && node -e "require.resolve('zod/package.json')" && \
   ls -d /roomote/node_modules/.pnpm/zod@*/node_modules/zod >/dev/null
 
diff --git a/apps/bullmq/package.json b/apps/bullmq/package.json
index 6113f884eb..54e0979f81 100644
--- a/apps/bullmq/package.json
+++ b/apps/bullmq/package.json
@@ -37,6 +37,7 @@
     "bullmq": "^5.78.0",
     "hono": "4.13.5",
     "ioredis": "^5.10.1",
+    "jsdom": "26.1.0",
     "zod": "^3.25.76"
   },
   "devDependencies": {
diff --git a/apps/bullmq/src/build-artifact.test.ts b/apps/bullmq/src/build-artifact.test.ts
new file mode 100644
index 0000000000..ef4b2a1767
--- /dev/null
+++ b/apps/bullmq/src/build-artifact.test.ts
@@ -0,0 +1,43 @@
+import { execFileSync } from 'node:child_process';
+import { mkdtempSync, readFileSync, rmSync } from 'node:fs';
+import { createRequire } from 'node:module';
+import { tmpdir } from 'node:os';
+import { dirname, join } from 'node:path';
+
+const nodeRequire = createRequire(import.meta.url);
+
+describe('BullMQ build artifact', () => {
+  it('ships the JSDOM synchronous XHR worker beside the bundled entrypoint', () => {
+    const packageDirectory = join(import.meta.dirname, '..');
+    const outputDirectory = mkdtempSync(
+      join(tmpdir(), 'roomote-bullmq-build-'),
+    );
+
+    try {
+      execFileSync(
+        process.execPath,
+        [
+          join(
+            dirname(nodeRequire.resolve('tsup/package.json')),
+            'dist/cli-default.js',
+          ),
+          '--config',
+          join(packageDirectory, 'tsup.config.ts'),
+          '--out-dir',
+          outputDirectory,
+        ],
+        { cwd: packageDirectory, stdio: 'pipe' },
+      );
+
+      const bundlePath = join(outputDirectory, 'index.js');
+      expect(readFileSync(bundlePath, 'utf8')).toContain(
+        'require.resolve("./xhr-sync-worker.js")',
+      );
+      expect(createRequire(bundlePath).resolve('./xhr-sync-worker.js')).toBe(
+        join(dirname(bundlePath), 'xhr-sync-worker.js'),
+      );
+    } finally {
+      rmSync(outputDirectory, { recursive: true, force: true });
+    }
+  });
+});
diff --git a/apps/bullmq/src/docker-runtime-deps.test.ts b/apps/bullmq/src/docker-runtime-deps.test.ts
index 1d4ca52bc7..8074be3d8d 100644
--- a/apps/bullmq/src/docker-runtime-deps.test.ts
+++ b/apps/bullmq/src/docker-runtime-deps.test.ts
@@ -30,4 +30,16 @@ describe('BullMQ image runtime dependencies', () => {
       'cd /roomote/apps/bullmq && node -e "require.resolve(\'zod/package.json\')"',
     );
   });
+
+  it('verifies the JSDOM synchronous XHR worker reaches the final image', () => {
+    const runtimeStage = dockerfile
+      .split(/^FROM /mu)
+      .find((stage) =>
+        stage.startsWith('runtime-inference-base AS runtime-app'),
+      );
+
+    expect(runtimeStage).toContain(
+      'test -f /roomote/apps/bullmq/dist/xhr-sync-worker.js',
+    );
+  });
 });
diff --git a/apps/bullmq/tsup.config.ts b/apps/bullmq/tsup.config.ts
index 40138c5e70..6d8f4aaa21 100644
--- a/apps/bullmq/tsup.config.ts
+++ b/apps/bullmq/tsup.config.ts
@@ -1,7 +1,21 @@
+import { createRequire } from 'node:module';
+import { dirname, join } from 'node:path';
+
 import { defineConfig } from 'tsup';
 
+const nodeRequire = createRequire(import.meta.url);
+const jsdomEntry = nodeRequire.resolve('jsdom');
+const jsdomSyncWorkerEntry = join(
+  dirname(jsdomEntry),
+  'jsdom/living/xhr/xhr-sync-worker.js',
+);
+
 export default defineConfig({
-  entry: ['src/index.ts'],
+  entry: {
+    index: 'src/index.ts',
+    // JSDOM resolves this helper relative to the bundle at runtime.
+    'xhr-sync-worker': jsdomSyncWorkerEntry,
+  },
   format: ['esm'],
   target: 'node22',
   platform: 'node',
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 3091b36d9b..6a6863024e 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -323,6 +323,9 @@ importers:
       ioredis:
         specifier: 5.10.1
         version: 5.10.1
+      jsdom:
+        specifier: 26.1.0
+        version: 26.1.0(bufferutil@4.1.0)(utf-8-validate@6.0.6)
       zod:
         specifier: ^3.25.76
         version: 3.25.76