diff --git a/.github/workflows/test_backend.yml b/.github/workflows/test_backend.yml
index 09a16eaef..0d1d629dd 100644
--- a/.github/workflows/test_backend.yml
+++ b/.github/workflows/test_backend.yml
@@ -69,7 +69,7 @@ jobs:
       - name: Backend | Unit tests
         id: test
         run: |
-          cd out && turbo backend#lint backend#test
+          cd out && turbo backend#lint backend#test backend#build backend#typecheck
           echo "success=$([ $? -eq 0 ] && echo true || echo false)" >> $GITHUB_OUTPUT
 
   lint:
diff --git a/backend/esbuild.config.ts b/backend/esbuild.config.ts
index 38ca5b58d..a475d3b52 100644
--- a/backend/esbuild.config.ts
+++ b/backend/esbuild.config.ts
@@ -1,3 +1,4 @@
+import { esbuildDecorators } from '@anatine/esbuild-decorators'
 import { build } from 'esbuild'
 
 build({
@@ -8,6 +9,7 @@ build({
   bundle: true,
   keepNames: true,
   // legalComments: 'inline',
-  external: ['sodium-native'],
+  external: ['reflect-metadata', 'sodium-native', 'email-templates'],
+  plugins: [esbuildDecorators()],
   minify: true,
 })
diff --git a/backend/package.json b/backend/package.json
index 54adb87c0..0a2ac2fd2 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -8,10 +8,10 @@
   "license": "Apache-2.0",
   "private": false,
   "scripts": {
-    "build": "tsc --build && mkdirp build/src/emails/templates/ && ncp src/emails/templates build/src/emails/templates && mkdirp build/src/locales/ && ncp src/locales build/src/locales",
-    "clean": "tsc --build --clean",
-    "start": "cross-env TZ=UTC TS_NODE_BASEURL=./build node -r tsconfig-paths/register build/src/index.js",
-    "dev": "cross-env TZ=UTC nodemon -w src --ext ts,pug,json,css --exec ts-node -r tsconfig-paths/register src/index.ts",
+    "build": "tsx esbuild.config.ts",
+    "start": "cross-env TZ=UTC node build/index.js",
+    "dev": "cross-env TZ=UTC tsx watch src/index.ts",
+    "typecheck": "tsc --noEmit",
     "lint": "biome check --error-on-warnings .",
     "lint:fix": "biome check --error-on-warnings . --write",
     "test": "cross-env TZ=UTC NODE_ENV=development DB_DATABASE=gradido_test_backend jest --runInBand --forceExit --detectOpenHandles",
@@ -60,9 +60,10 @@
     "xregexp": "^5.1.1"
   },
   "devDependencies": {
+    "@anatine/esbuild-decorators": "^0.2.19",
+    "@biomejs/biome": "1.9.4",
     "@types/email-templates": "^10.0.4",
     "@types/express": "^4.17.21",
-    "@biomejs/biome": "1.9.4",
     "@types/faker": "^5.5.9",
     "@types/i18n": "^0.13.4",
     "@types/jest": "27.0.2",
diff --git a/backend/src/index.ts b/backend/src/index.ts
index 9b1b72ba5..01f7f47a3 100644
--- a/backend/src/index.ts
+++ b/backend/src/index.ts
@@ -1,3 +1,4 @@
+import 'reflect-metadata'
 import { CONFIG } from './config'
 import { startValidateCommunities } from './federation/validateCommunities'
 import { createServer } from './server/createServer'
diff --git a/bun.lock b/bun.lock
index cf380e4f4..88e4ee180 100644
--- a/bun.lock
+++ b/bun.lock
@@ -122,6 +122,7 @@
         "xregexp": "^5.1.1",
       },
       "devDependencies": {
+        "@anatine/esbuild-decorators": "^0.2.19",
         "@biomejs/biome": "1.9.4",
         "@types/email-templates": "^10.0.4",
         "@types/express": "^4.17.21",
@@ -355,6 +356,8 @@
   "packages": {
     "@ampproject/remapping": ["@ampproject/remapping@2.3.0", "", { "dependencies": { "@jridgewell/gen-mapping": "^0.3.5", "@jridgewell/trace-mapping": "^0.3.24" } }, "sha512-30iZtAPgz+LTIYoeivqYo853f02jBYSd5uGnGpkFV0M3xOt9aN73erkgYAmZU43x4VfqcnLxW9Kpg3R5LC4YYw=="],
 
+    "@anatine/esbuild-decorators": ["@anatine/esbuild-decorators@0.2.19", "", { "peerDependencies": { "esbuild": "~0.14.29" } }, "sha512-pyj6ULyMacyzpDqlnbS2OCkOqxcVgk8IqiTMRJ5CrsF8Yl1azvlX/AM6xWR8UzHKUYDlWOw5mOpos3+7KKR0Lw=="],
+
     "@antfu/install-pkg": ["@antfu/install-pkg@0.4.1", "", { "dependencies": { "package-manager-detector": "^0.2.0", "tinyexec": "^0.3.0" } }, "sha512-T7yB5QNG29afhWVkVq7XeIMBa5U/vs9mX69YqayXypPRmYzUmzwnYltplHmPtZ4HPCn+sQKeXW8I47wCbuBOjw=="],
 
     "@antfu/utils": ["@antfu/utils@0.7.10", "", {}, "sha512-+562v9k4aI80m1+VuMHehNJWLOFjBnXn3tdOitzD0il5b7smkSBal4+a3oKiQTbrwMmN/TBUMDvbdoWDehgOww=="],
diff --git a/yarn.lock b/yarn.lock
index b97a52c87..526c35245 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -10,6 +10,11 @@
     "@jridgewell/gen-mapping" "^0.3.5"
     "@jridgewell/trace-mapping" "^0.3.24"
 
+"@anatine/esbuild-decorators@^0.2.19":
+  version "0.2.19"
+  resolved "https://registry.yarnpkg.com/@anatine/esbuild-decorators/-/esbuild-decorators-0.2.19.tgz#d4137182abfdf0e6de680f69b447492813b62ef4"
+  integrity sha512-pyj6ULyMacyzpDqlnbS2OCkOqxcVgk8IqiTMRJ5CrsF8Yl1azvlX/AM6xWR8UzHKUYDlWOw5mOpos3+7KKR0Lw==
+
 "@antfu/install-pkg@^0.4.1":
   version "0.4.1"
   resolved "https://registry.yarnpkg.com/@antfu/install-pkg/-/install-pkg-0.4.1.tgz#d1d7f3be96ecdb41581629cafe8626d1748c0cf1"