diff --git a/.changeset/sparkly-rivers-sell.md b/.changeset/sparkly-rivers-sell.md
new file mode 100644
index 00000000000..ff0524f84e2
--- /dev/null
+++ b/.changeset/sparkly-rivers-sell.md
@@ -0,0 +1,5 @@
+---
+'@sap-ux/backend-proxy-middleware': patch
+---
+
+fix: simplify type usage
diff --git a/packages/backend-proxy-middleware/package.json b/packages/backend-proxy-middleware/package.json
index 141921c4385..fbd94372725 100644
--- a/packages/backend-proxy-middleware/package.json
+++ b/packages/backend-proxy-middleware/package.json
@@ -55,9 +55,6 @@
         "supertest": "7.1.4",
         "yaml": "2.2.2"
     },
-    "ui5": {
-        "dependencies": []
-    },
     "engines": {
         "node": ">=20.x"
     }
diff --git a/packages/backend-proxy-middleware/src/base/types.ts b/packages/backend-proxy-middleware/src/base/types.ts
index 48ed34251c6..5465524f247 100644
--- a/packages/backend-proxy-middleware/src/base/types.ts
+++ b/packages/backend-proxy-middleware/src/base/types.ts
@@ -68,10 +68,3 @@ export interface BackendMiddlewareConfig {
     options?: Partial<Options>;
     debug?: boolean;
 }
-
-export interface MiddlewareParameters<T> {
-    resources: object;
-    options: {
-        configuration: T;
-    };
-}
diff --git a/packages/backend-proxy-middleware/src/middleware.ts b/packages/backend-proxy-middleware/src/middleware.ts
index 84894189a85..a2d880ddc30 100644
--- a/packages/backend-proxy-middleware/src/middleware.ts
+++ b/packages/backend-proxy-middleware/src/middleware.ts
@@ -3,8 +3,9 @@ import { LogLevel, ToolsLogger, UI5ToolingTransport } from '@sap-ux/logger';
 import type { RequestHandler } from 'express';
 import express from 'express';
 import { createProxyMiddleware } from 'http-proxy-middleware';
-import type { BackendMiddlewareConfig, MiddlewareParameters } from './base/types';
+import type { BackendMiddlewareConfig } from './base/types';
 import { generateProxyMiddlewareOptions, initI18n } from './base/proxy';
+import type { MiddlewareParameters } from '@ui5/server';
 
 /**
  * Hides the proxy credentials for displaying the proxy configuration in the console.
@@ -33,6 +34,11 @@ function formatProxyForLogging(proxy: string | undefined): string | undefined {
  * @returns {*}  {(Promise<RequestHandler>)}
  */
 module.exports = async ({ options }: MiddlewareParameters<BackendMiddlewareConfig>): Promise<RequestHandler> => {
+    const backend = options.configuration?.backend;
+    if (!backend) {
+        throw new Error('no backend configuration found.');
+    }
+
     const logger = new ToolsLogger({
         logLevel: options.configuration?.debug ? LogLevel.Debug : LogLevel.Info,
         transports: [new UI5ToolingTransport({ moduleName: 'backend-proxy-middleware' })]
@@ -42,13 +48,12 @@ module.exports = async ({ options }: MiddlewareParameters<BackendMiddlewareConfi
     dotenv.config();
     const router = express.Router();
 
-    const backend = options.configuration.backend;
-    const configOptions = options.configuration.options ?? {};
+    const configOptions = options.configuration?.options ?? {};
     configOptions.secure = configOptions.secure !== undefined ? !!configOptions.secure : true;
     configOptions.logger = options.configuration?.debug ? logger : undefined;
 
     try {
-        const proxyOptions = await generateProxyMiddlewareOptions(options.configuration.backend, configOptions, logger);
+        const proxyOptions = await generateProxyMiddlewareOptions(backend, configOptions, logger);
         const proxyFn = createProxyMiddleware(proxyOptions);
         logger.info(
             `Starting backend-proxy-middleware using following configuration:\nbackend: ${JSON.stringify({
diff --git a/packages/backend-proxy-middleware/tsconfig.json b/packages/backend-proxy-middleware/tsconfig.json
index 15c3fb4d358..752412b3525 100644
--- a/packages/backend-proxy-middleware/tsconfig.json
+++ b/packages/backend-proxy-middleware/tsconfig.json
@@ -1,14 +1,17 @@
 {
     "extends": "../../tsconfig.json",
-    "include": ["src", "src/**/*.json"],
+    "include": [
+        "../../types/ui5.d.ts",
+        "src",
+        "src/**/*.json"],
     "compilerOptions": {
         "rootDir": "src",
         "outDir": "dist"
     },
     "references": [
-        { "path": "../axios-extension" }, 
-        { "path": "../btp-utils" }, 
-        { "path": "../logger" }, 
+        { "path": "../axios-extension" },
+        { "path": "../btp-utils" },
+        { "path": "../logger" },
         { "path": "../store" }
     ]
 }