diff --git a/backend/app.js b/backend/app.js
index f10d65e..57b44eb 100644
--- a/backend/app.js
+++ b/backend/app.js
@@ -10,6 +10,7 @@ import contactRouter from './routers/contactRouter.js';
 import cors from 'cors';
 import socialnetworkRouter from './routers/socialnetworkRouter.js';
 import forumRouter from './routers/forumRouter.js';
+import './jobs/sessionCleanup.js';
 
 const __filename = fileURLToPath(import.meta.url);
 const __dirname = path.dirname(__filename);
diff --git a/backend/controllers/authController.js b/backend/controllers/authController.js
index 43576c5..56e25d5 100644
--- a/backend/controllers/authController.js
+++ b/backend/controllers/authController.js
@@ -6,6 +6,7 @@ class AuthController {
         this.login = this.login.bind(this);
         this.forgotPassword = this.forgotPassword.bind(this);
         this.activateAccount = this.activateAccount.bind(this);
+        this.logout = this.logout.bind(this);
     }
 
     async register(req, res) {
@@ -33,6 +34,11 @@ class AuthController {
         }
     }
 
+    async logout(req, res) {
+        const { userid: hashedUserId } = req.headers;
+        await userService.logoutUser(hashedUserId);
+    }
+
     async forgotPassword(req, res) {
         const { email } = req.body;
         try {
diff --git a/backend/jobs/sessionCleanup.js b/backend/jobs/sessionCleanup.js
new file mode 100644
index 0000000..9da0664
--- /dev/null
+++ b/backend/jobs/sessionCleanup.js
@@ -0,0 +1,5 @@
+import { cleanupExpiredSessions } from '../utils/redis.js';
+
+setInterval(async () => {
+    await cleanupExpiredSessions();
+}, 5000);
diff --git a/backend/middleware/authMiddleware.js b/backend/middleware/authMiddleware.js
index 9e9ba9c..6054345 100644
--- a/backend/middleware/authMiddleware.js
+++ b/backend/middleware/authMiddleware.js
@@ -1,4 +1,5 @@
 import User from '../models/community/user.js';
+import { updateUserTimestamp } from '../utils/redis.js';
 
 export const authenticate = async (req, res, next) => {
     const userId = req.headers.userid;
@@ -6,11 +7,14 @@ export const authenticate = async (req, res, next) => {
     if (!userId || !authCode) {
         return res.status(401).json({ error: 'Unauthorized: Missing credentials' });
     }
-
     const user = await User.findOne({ where: { hashedId: userId, authCode } });
     if (!user) {
         return res.status(401).json({ error: 'Unauthorized: Invalid credentials' });
     }
-
+    try {
+        await updateUserTimestamp(userId);
+    } catch (error) {
+        console.error('Fehler beim Aktualisieren des Zeitstempels:', error);
+    }
     next();
 };
diff --git a/backend/package-lock.json b/backend/package-lock.json
index b3d13c7..073e8c2 100644
--- a/backend/package-lock.json
+++ b/backend/package-lock.json
@@ -11,10 +11,12 @@
       "dependencies": {
         "amqplib": "^0.10.4",
         "bcrypt": "^5.1.1",
+        "connect-redis": "^7.1.1",
         "cors": "^2.8.5",
         "dompurify": "^3.1.7",
         "dotenv": "^16.4.5",
         "express": "^4.19.2",
+        "express-session": "^1.18.1",
         "i18n": "^0.15.1",
         "joi": "^17.13.3",
         "jsdom": "^25.0.1",
@@ -23,6 +25,7 @@
         "nodemailer": "^6.9.14",
         "pg": "^8.12.0",
         "pg-hstore": "^2.3.4",
+        "redis": "^4.7.0",
         "sequelize": "^6.37.3",
         "sharp": "^0.33.5",
         "socket.io": "^4.7.5",
@@ -579,6 +582,59 @@
         "node": ">=14"
       }
     },
+    "node_modules/@redis/bloom": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/@redis/bloom/-/bloom-1.2.0.tgz",
+      "integrity": "sha512-HG2DFjYKbpNmVXsa0keLHp/3leGJz1mjh09f2RLGGLQZzSHpkmZWuwJbAvo3QcRY8p80m5+ZdXZdYOSBLlp7Cg==",
+      "peerDependencies": {
+        "@redis/client": "^1.0.0"
+      }
+    },
+    "node_modules/@redis/client": {
+      "version": "1.6.0",
+      "resolved": "https://registry.npmjs.org/@redis/client/-/client-1.6.0.tgz",
+      "integrity": "sha512-aR0uffYI700OEEH4gYnitAnv3vzVGXCFvYfdpu/CJKvk4pHfLPEy/JSZyrpQ+15WhXe1yJRXLtfQ84s4mEXnPg==",
+      "dependencies": {
+        "cluster-key-slot": "1.1.2",
+        "generic-pool": "3.9.0",
+        "yallist": "4.0.0"
+      },
+      "engines": {
+        "node": ">=14"
+      }
+    },
+    "node_modules/@redis/graph": {
+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/@redis/graph/-/graph-1.1.1.tgz",
+      "integrity": "sha512-FEMTcTHZozZciLRl6GiiIB4zGm5z5F3F6a6FZCyrfxdKOhFlGkiAqlexWMBzCi4DcRoyiOsuLfW+cjlGWyExOw==",
+      "peerDependencies": {
+        "@redis/client": "^1.0.0"
+      }
+    },
+    "node_modules/@redis/json": {
+      "version": "1.0.7",
+      "resolved": "https://registry.npmjs.org/@redis/json/-/json-1.0.7.tgz",
+      "integrity": "sha512-6UyXfjVaTBTJtKNG4/9Z8PSpKE6XgSyEb8iwaqDcy+uKrd/DGYHTWkUdnQDyzm727V7p21WUMhsqz5oy65kPcQ==",
+      "peerDependencies": {
+        "@redis/client": "^1.0.0"
+      }
+    },
+    "node_modules/@redis/search": {
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/@redis/search/-/search-1.2.0.tgz",
+      "integrity": "sha512-tYoDBbtqOVigEDMAcTGsRlMycIIjwMCgD8eR2t0NANeQmgK/lvxNAvYyb6bZDD4frHRhIHkJu2TBRvB0ERkOmw==",
+      "peerDependencies": {
+        "@redis/client": "^1.0.0"
+      }
+    },
+    "node_modules/@redis/time-series": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/@redis/time-series/-/time-series-1.1.0.tgz",
+      "integrity": "sha512-c1Q99M5ljsIuc4YdaCwfUEXsofakb9c8+Zse2qxTadu8TalLXuAESzLvFAvNVbkmSlvlzIQOLpBCmWI9wTOt+g==",
+      "peerDependencies": {
+        "@redis/client": "^1.0.0"
+      }
+    },
     "node_modules/@sideway/address": {
       "version": "4.1.5",
       "resolved": "https://registry.npmjs.org/@sideway/address/-/address-4.1.5.tgz",
@@ -960,6 +1016,14 @@
         "wrap-ansi": "^7.0.0"
       }
     },
+    "node_modules/cluster-key-slot": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/cluster-key-slot/-/cluster-key-slot-1.1.2.tgz",
+      "integrity": "sha512-RMr0FhtfXemyinomL4hrWcYJxmX6deFdCxpJzhDttxgO1+bcCnkk+9drydLVDmAMG7NE6aN/fl4F7ucU/90gAA==",
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
     "node_modules/color": {
       "version": "4.2.3",
       "resolved": "https://registry.npmjs.org/color/-/color-4.2.3.tgz",
@@ -1081,6 +1145,17 @@
         "proto-list": "~1.2.1"
       }
     },
+    "node_modules/connect-redis": {
+      "version": "7.1.1",
+      "resolved": "https://registry.npmjs.org/connect-redis/-/connect-redis-7.1.1.tgz",
+      "integrity": "sha512-M+z7alnCJiuzKa8/1qAYdGUXHYfDnLolOGAUjOioB07pP39qxjG+X9ibsud7qUBc4jMV5Mcy3ugGv8eFcgamJQ==",
+      "engines": {
+        "node": ">=16"
+      },
+      "peerDependencies": {
+        "express-session": ">=1"
+      }
+    },
     "node_modules/console-control-strings": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/console-control-strings/-/console-control-strings-1.1.0.tgz",
@@ -1611,6 +1686,69 @@
         "node": ">= 0.10.0"
       }
     },
+    "node_modules/express-session": {
+      "version": "1.18.1",
+      "resolved": "https://registry.npmjs.org/express-session/-/express-session-1.18.1.tgz",
+      "integrity": "sha512-a5mtTqEaZvBCL9A9aqkrtfz+3SMDhOVUnjafjo+s7A9Txkq+SVX2DLvSp1Zrv4uCXa3lMSK3viWnh9Gg07PBUA==",
+      "dependencies": {
+        "cookie": "0.7.2",
+        "cookie-signature": "1.0.7",
+        "debug": "2.6.9",
+        "depd": "~2.0.0",
+        "on-headers": "~1.0.2",
+        "parseurl": "~1.3.3",
+        "safe-buffer": "5.2.1",
+        "uid-safe": "~2.1.5"
+      },
+      "engines": {
+        "node": ">= 0.8.0"
+      }
+    },
+    "node_modules/express-session/node_modules/cookie": {
+      "version": "0.7.2",
+      "resolved": "https://registry.npmjs.org/cookie/-/cookie-0.7.2.tgz",
+      "integrity": "sha512-yki5XnKuf750l50uGTllt6kKILY4nQ1eNIQatoXEByZ5dWgnKqbnqmTrBE5B4N7lrMJKQ2ytWMiTO2o0v6Ew/w==",
+      "engines": {
+        "node": ">= 0.6"
+      }
+    },
+    "node_modules/express-session/node_modules/cookie-signature": {
+      "version": "1.0.7",
+      "resolved": "https://registry.npmjs.org/cookie-signature/-/cookie-signature-1.0.7.tgz",
+      "integrity": "sha512-NXdYc3dLr47pBkpUCHtKSwIOQXLVn8dZEuywboCOJY/osA0wFSLlSawr3KN8qXJEyX66FcONTH8EIlVuK0yyFA=="
+    },
+    "node_modules/express-session/node_modules/debug": {
+      "version": "2.6.9",
+      "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.9.tgz",
+      "integrity": "sha512-bC7ElrdJaJnPbAP+1EotYvqZsb3ecl5wi6Bfi6BJTUcNowp6cvspg0jXznRTKDjm/E7AdgFBVeAPVMNcKGsHMA==",
+      "dependencies": {
+        "ms": "2.0.0"
+      }
+    },
+    "node_modules/express-session/node_modules/ms": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
+      "integrity": "sha512-Tpp60P6IUJDTuOq/5Z8cdskzJujfwqfOTkrwIwj7IRISpnkJnT6SyJ4PCPnGMoFjC9ddhal5KVIYtAt97ix05A=="
+    },
+    "node_modules/express-session/node_modules/safe-buffer": {
+      "version": "5.2.1",
+      "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.2.1.tgz",
+      "integrity": "sha512-rp3So07KcdmmKbGvgaNxQSJr7bGVSVk5S9Eq1F+ppbRo70+YeaDxkw5Dd8NPN+GD6bjnYm2VuPuCXmpuYvmCXQ==",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/feross"
+        },
+        {
+          "type": "patreon",
+          "url": "https://www.patreon.com/feross"
+        },
+        {
+          "type": "consulting",
+          "url": "https://feross.org/support"
+        }
+      ]
+    },
     "node_modules/express/node_modules/debug": {
       "version": "2.6.9",
       "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.9.tgz",
@@ -1828,6 +1966,14 @@
         "is-property": "^1.0.2"
       }
     },
+    "node_modules/generic-pool": {
+      "version": "3.9.0",
+      "resolved": "https://registry.npmjs.org/generic-pool/-/generic-pool-3.9.0.tgz",
+      "integrity": "sha512-hymDOu5B53XvN4QT9dBmZxPX4CWhBPPLguTZ9MMFeFa/Kg0xWVfylOVNlJji/E7yTZWFd/q9GO5TxDLq156D7g==",
+      "engines": {
+        "node": ">= 4"
+      }
+    },
     "node_modules/get-caller-file": {
       "version": "2.0.5",
       "resolved": "https://registry.npmjs.org/get-caller-file/-/get-caller-file-2.0.5.tgz",
@@ -2806,6 +2952,14 @@
         "node": ">= 0.8"
       }
     },
+    "node_modules/on-headers": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/on-headers/-/on-headers-1.0.2.tgz",
+      "integrity": "sha512-pZAE+FJLoyITytdqK0U5s+FIpjN0JP3OzFi/u8Rx+EV5/W+JTWGXG8xFzevE7AjBfDqHv/8vL8qQsIhHnqRkrA==",
+      "engines": {
+        "node": ">= 0.8"
+      }
+    },
     "node_modules/once": {
       "version": "1.4.0",
       "resolved": "https://registry.npmjs.org/once/-/once-1.4.0.tgz",
@@ -3060,6 +3214,14 @@
       "resolved": "https://registry.npmjs.org/querystringify/-/querystringify-2.2.0.tgz",
       "integrity": "sha512-FIqgj2EUvTa7R50u0rGsyTftzjYmv/a3hO345bZNrqabNqjtgiDMgmo4mkUjd+nzU5oF3dClKqFIPUKybUyqoQ=="
     },
+    "node_modules/random-bytes": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/random-bytes/-/random-bytes-1.0.0.tgz",
+      "integrity": "sha512-iv7LhNVO047HzYR3InF6pUcUsPQiHTM1Qal51DcGSuZFBil1aBBWG5eHPNek7bvILMaYJ/8RU1e8w1AMdHmLQQ==",
+      "engines": {
+        "node": ">= 0.8"
+      }
+    },
     "node_modules/range-parser": {
       "version": "1.2.1",
       "resolved": "https://registry.npmjs.org/range-parser/-/range-parser-1.2.1.tgz",
@@ -3093,6 +3255,22 @@
         "string_decoder": "~0.10.x"
       }
     },
+    "node_modules/redis": {
+      "version": "4.7.0",
+      "resolved": "https://registry.npmjs.org/redis/-/redis-4.7.0.tgz",
+      "integrity": "sha512-zvmkHEAdGMn+hMRXuMBtu4Vo5P6rHQjLoHftu+lBqq8ZTA3RCVC/WzD790bkKKiNFp7d5/9PcSD19fJyyRvOdQ==",
+      "workspaces": [
+        "./packages/*"
+      ],
+      "dependencies": {
+        "@redis/bloom": "1.2.0",
+        "@redis/client": "1.6.0",
+        "@redis/graph": "1.1.1",
+        "@redis/json": "1.0.7",
+        "@redis/search": "1.2.0",
+        "@redis/time-series": "1.1.0"
+      }
+    },
     "node_modules/require-directory": {
       "version": "2.1.1",
       "resolved": "https://registry.npmjs.org/require-directory/-/require-directory-2.1.1.tgz",
@@ -3715,6 +3893,17 @@
       "resolved": "https://registry.npmjs.org/typedarray/-/typedarray-0.0.6.tgz",
       "integrity": "sha512-/aCDEGatGvZ2BIk+HmLf4ifCJFwvKFNb9/JeZPMulfgFracn9QFcAf5GO8B/mweUjSoblS5In0cWhqpfs/5PQA=="
     },
+    "node_modules/uid-safe": {
+      "version": "2.1.5",
+      "resolved": "https://registry.npmjs.org/uid-safe/-/uid-safe-2.1.5.tgz",
+      "integrity": "sha512-KPHm4VL5dDXKz01UuEd88Df+KzynaohSL9fBh096KWAxSKZQDI2uBrVqtvRM4rwrIrRRKsdLNML/lnaaVSRioA==",
+      "dependencies": {
+        "random-bytes": "~1.0.0"
+      },
+      "engines": {
+        "node": ">= 0.8"
+      }
+    },
     "node_modules/umzug": {
       "version": "2.3.0",
       "resolved": "https://registry.npmjs.org/umzug/-/umzug-2.3.0.tgz",
diff --git a/backend/package.json b/backend/package.json
index 5189a09..a3311a4 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -13,10 +13,12 @@
   "dependencies": {
     "amqplib": "^0.10.4",
     "bcrypt": "^5.1.1",
+    "connect-redis": "^7.1.1",
     "cors": "^2.8.5",
     "dompurify": "^3.1.7",
     "dotenv": "^16.4.5",
     "express": "^4.19.2",
+    "express-session": "^1.18.1",
     "i18n": "^0.15.1",
     "joi": "^17.13.3",
     "jsdom": "^25.0.1",
@@ -25,6 +27,7 @@
     "nodemailer": "^6.9.14",
     "pg": "^8.12.0",
     "pg-hstore": "^2.3.4",
+    "redis": "^4.7.0",
     "sequelize": "^6.37.3",
     "sharp": "^0.33.5",
     "socket.io": "^4.7.5",
diff --git a/backend/routers/authRouter.js b/backend/routers/authRouter.js
index c507027..fb81b97 100644
--- a/backend/routers/authRouter.js
+++ b/backend/routers/authRouter.js
@@ -8,5 +8,6 @@ router.post('/register', authController.register);
 router.post('/login', authController.login);
 router.post('/forgot-password', authController.forgotPassword);
 router.post('/activate', authController.activateAccount);
+router.get('/logout', authController.logout);
 
 export default router;
diff --git a/backend/services/authService.js b/backend/services/authService.js
index 7ab61bd..80e5417 100644
--- a/backend/services/authService.js
+++ b/backend/services/authService.js
@@ -6,6 +6,7 @@ import UserParam from '../models/community/user_param.js';
 import UserParamType from '../models/type/user_param.js';
 import { sendAccountActivationEmail, sendPasswordResetEmail } from './emailService.js';
 import { sequelize } from '../utils/sequelize.js';
+import { setUserSession, deleteUserSession } from '../utils/redis.js';
 
 const saltRounds = 10;
 
@@ -31,22 +32,18 @@ export const registerUser = async ({ email, username, password, language }) => {
         active: false,
         registration_date: new Date()
     });
-
     const languageType = await UserParamType.findOne({ where: { description: 'language' } });
     if (!languageType) {
         throw new Error('languagenotfound');
     }
-
     const languageParam = await UserParam.create({
         userId: user.id,
         paramTypeId: languageType.id,
         value: language
     });
-
     const activationLink = `${process.env.FRONTEND_URL}/activate?token=${resetToken}`;
     await sendAccountActivationEmail(email, activationLink, username, resetToken, language);
     const authCode = crypto.randomBytes(20).toString('hex');
-
     return { id: user.hashedId, username: user.username, active: user.active, param: [languageParam], authCode };
 };
 
@@ -62,6 +59,14 @@ export const loginUser = async ({ username, password }) => {
     const authCode = crypto.randomBytes(20).toString('hex');
     user.authCode = authCode;
     await user.save();
+    const sessionData = {
+        id: user.hashedId,
+        username: user.username,
+        active: user.active,
+        authCode,
+        timestamp: Date.now()
+    };
+    await setUserSession(user.id, sessionData);
     const params = await UserParam.findAll({
         where: {
             userId: user.id
@@ -86,6 +91,24 @@ export const loginUser = async ({ username, password }) => {
     };
 };
 
+export const logoutUser = async (hashedUserId) => {
+    try {
+        const user = User.findOne({
+            where: {
+                hashedId: hashedUserId
+            }
+        })
+        if (!user) {
+            return;
+        }
+        await deleteUserSession(user.id);
+        console.log('Benutzer erfolgreich aus Redis entfernt:', userId);
+    } catch (error) {
+        console.error('Fehler beim Logout:', error);
+        throw new Error('logoutfailed');
+    }
+};
+
 export const handleForgotPassword = async ({ email }) => {
     const user = await User.findOne({ where: { email } });
     if (!user) {
diff --git a/backend/utils/redis.js b/backend/utils/redis.js
new file mode 100644
index 0000000..84acea0
--- /dev/null
+++ b/backend/utils/redis.js
@@ -0,0 +1,82 @@
+import dotenv from 'dotenv';
+import { createClient } from 'redis';
+import User from '../models/community/user.js';
+
+dotenv.config();
+
+const EXPIRATION_TIME = 30 * 60 * 1000;
+
+const redisClient = createClient({
+    url: `redis://${process.env.REDIS_HOST}:${process.env.REDIS_PORT}`,
+    password: process.env.REDIS_PASSWORD,
+    legacyMode: true, 
+});
+
+redisClient.connect().catch(console.error);
+
+const setUserSession = async (userId, sessionData) => {
+    try {
+        await redisClient.hSet(`user:${userId}`, sessionData);
+    } catch (error) {
+        console.error('Fehler beim Setzen der Benutzersitzung:', error);
+    }
+};
+
+const deleteUserSession = async (userId) => {
+    try {
+        await redisClient.del(`user:${userId}`);
+    } catch (error) {
+        console.error('Fehler beim Löschen der Benutzersitzung:', error);
+    }
+};
+
+const getUserSession = async (userId) => {
+    try {
+        return await redisClient.hGetAll(`user:${userId}`);
+    } catch (error) {
+        console.error('Fehler beim Abrufen der Benutzersitzung:', error);
+        return null;
+    }
+};
+
+const updateUserTimestamp = async (hashedId) => {
+    try {
+        const userKey = `user:${hashedId}`;
+        const userExists = await redisClient.exists(userKey);
+        if (userExists) {
+            await redisClient.hSet(userKey, 'timestamp', Date.now());
+            console.log(`Zeitstempel für Benutzer ${hashedId} aktualisiert.`);
+        } else {
+            console.warn(`Benutzer mit der hashedId ${hashedId} wurde nicht gefunden.`);
+        }
+    } catch (error) {
+        console.error('Fehler beim Aktualisieren des Zeitstempels:', error);
+    }
+};
+
+const cleanupExpiredSessions = async () => {
+    try {
+        const keys = await redisClient.keys('user:*');
+        const now = Date.now();
+        for (const key of keys) {
+            const session = await redisClient.hGetAll(key);
+            if (session.timestamp && now - parseInt(session.timestamp) > EXPIRATION_TIME) {
+                const userId = key.split(':')[1];
+                await redisClient.del(key);
+                await User.update({ authCode: '' }, { where: { hashedId: userId } });
+                console.log(`Abgelaufene Sitzung für Benutzer ${userId} gelöscht.`);
+            }
+        }
+    } catch (error) {
+        console.error('Fehler beim Bereinigen abgelaufener Sitzungen:', error);
+    }
+};
+
+export {
+    setUserSession,
+    deleteUserSession,
+    getUserSession,
+    updateUserTimestamp,
+    cleanupExpiredSessions,
+    redisClient
+};