diff --git a/backend/src/routes/companies.js b/backend/src/routes/companies.js
index 90fb487..b62d64c 100644
--- a/backend/src/routes/companies.js
+++ b/backend/src/routes/companies.js
@@ -139,8 +139,6 @@ router.post('/bulk-import', wrapAsync(async (req, res) => {
     const referer = req.headers.referer || `${req.protocol}://${req.hostname}${req.originalUrl}`;
     const link = new URL(referer);
     await CompaniesService.bulkImport(req, res, true, link.host);
-    const payload = true;
-    res.status(200).send(payload);
 }));
 
 /**
diff --git a/backend/src/services/companies.js b/backend/src/services/companies.js
index 67af406..e9568d2 100644
--- a/backend/src/services/companies.js
+++ b/backend/src/services/companies.js
@@ -7,10 +7,6 @@ const axios = require('axios');
 const config = require('../config');
 const stream = require('stream');
 
-
-
-
-
 module.exports = class CompaniesService {
   static async create(data, currentUser) {
     const transaction = await db.sequelize.transaction();
@@ -31,37 +27,52 @@ module.exports = class CompaniesService {
   };
 
   static async bulkImport(req, res, sendInvitationEmails = true, host) {
+    await processFile(req, res);
+    if (!req.file) {
+      throw new Error('No file uploaded');
+    }
+
+    // Return job ID immediately (asynchronous processing)
+    const jobId = Date.now().toString();
+    res.status(202).send({ jobId });
+
+    // Background processing
+    this.processCsvInBackground(req, req.file.buffer, req.currentUser);
+  }
+
+  static async processCsvInBackground(req, fileBuffer, currentUser) {
+    const bufferStream = new stream.PassThrough();
+    bufferStream.end(fileBuffer);
+
+    let batch = [];
+    const BATCH_SIZE = 500;
+
+    for await (const data of bufferStream.pipe(csv())) {
+      batch.push(data);
+      if (batch.length >= BATCH_SIZE) {
+        await this.processBatch(batch, currentUser);
+        batch = [];
+      }
+    }
+    if (batch.length > 0) {
+      await this.processBatch(batch, currentUser);
+    }
+    console.log('Import finished');
+  }
+
+  static async processBatch(batch, currentUser) {
     const transaction = await db.sequelize.transaction();
-
     try {
-      await processFile(req, res);
-      const bufferStream = new stream.PassThrough();
-      const results = [];
-
-      await bufferStream.end(Buffer.from(req.file.buffer, "utf-8")); // convert Buffer to Stream
-
-      await new Promise((resolve, reject) => {
-        bufferStream
-          .pipe(csv())
-          .on('data', (data) => results.push(data))
-          .on('end', async () => {
-            console.log('CSV results', results);
-            resolve();
-          })
-          .on('error', (error) => reject(error));
-      })
-
-      await CompaniesDBApi.bulkImport(results, {
-          transaction,
-          ignoreDuplicates: true,
-          validate: true,
-          currentUser: req.currentUser
+      await CompaniesDBApi.bulkImport(batch, {
+        transaction,
+        ignoreDuplicates: true,
+        validate: true,
+        currentUser: currentUser
       });
-
       await transaction.commit();
     } catch (error) {
       await transaction.rollback();
-      throw error;
+      console.error('Error processing batch:', error);
     }
   }
 
@@ -131,8 +142,4 @@ module.exports = class CompaniesService {
       throw error;
     }
   }
-
-  
-};
-
-
+};
\ No newline at end of file