diff --git a/cortex-js/src/index.ts b/cortex-js/src/index.ts
index c383a5417..34a1cef2a 100644
--- a/cortex-js/src/index.ts
+++ b/cortex-js/src/index.ts
@@ -1,31 +1,95 @@
 import {
-  CORTEX_CPP_PROCESS_DESTROY_URL,
   CORTEX_JS_SYSTEM_URL,
+  defaultCortexCppPort,
   defaultCortexJsHost,
   defaultCortexJsPort,
 } from '@/infrastructure/constants/cortex';
 import { getApp } from './app';
+import { fileManagerService } from './infrastructure/services/file-manager/file-manager.service';
 import { CortexUsecases } from './usecases/cortex/cortex.usecases';
 
+let host: string;
+let port: number;
+let enginePort: number;
+
 /**
  * Start the API server
  */
-export async function start(host?: string, port?: number) {
-  // getting port from env
-  const sHost = host || process.env.CORTEX_JS_HOST || defaultCortexJsHost;
-  const sPort = port || process.env.CORTEX_JS_PORT || defaultCortexJsPort;
-  const app = await getApp(sHost, Number(sPort));
+export async function start(
+  name?: string,
+  address?: string,
+  portNumber?: number,
+  enginePortNumber?: number,
+  dataFolder?: string,
+) {
+  if (name) {
+    const isProfileConfigExists = fileManagerService.profileConfigExists(name);
+    if (!isProfileConfigExists) {
+      await fileManagerService.writeConfigFile({
+        ...fileManagerService.defaultConfig(),
+        apiServerHost: address || defaultCortexJsHost,
+        apiServerPort: port || defaultCortexJsPort,
+        cortexCppPort: Number(enginePort) || defaultCortexCppPort,
+      });
+    }
+  }
+  const {
+    apiServerHost: configApiServerHost,
+    apiServerPort: configApiServerPort,
+    cortexCppPort: configCortexCppPort,
+  } = await fileManagerService.getConfig();
+
+  host = address || configApiServerHost || defaultCortexJsHost;
+  port = portNumber || configApiServerPort || defaultCortexJsPort;
+  if (host === 'localhost') {
+    host = '127.0.0.1';
+  }
+  enginePort =
+    Number(enginePortNumber) || configCortexCppPort || defaultCortexCppPort;
+  const dataFolderPath = dataFolder;
+
+  return startServer(dataFolderPath);
+}
+
+async function startServer(dataFolderPath?: string) {
+  const config = await fileManagerService.getConfig();
   try {
-    await app.listen(sPort, sHost);
+    if (dataFolderPath) {
+      await fileManagerService.writeConfigFile({
+        ...config,
+        dataFolderPath,
+      });
+      // load config again to create the data folder
+      await fileManagerService.getConfig(dataFolderPath);
+    }
+    const app = await getApp(host, port);
     const cortexUsecases = await app.resolve(CortexUsecases);
-    await cortexUsecases.startCortex();
-    console.log(`Started server at http://${sHost}:${sPort}`);
-    console.log(`API Playground available at http://${sHost}:${sPort}/api`);
-  } catch {
+    await cortexUsecases.startCortex().catch((e) => {
+      throw e;
+    });
+    const isServerOnline = await cortexUsecases.isAPIServerOnline();
+    if (isServerOnline) {
+      console.log(
+        `Server is already running at http://${host}:${port}. Please use 'cortex stop' to stop the server.`,
+      );
+    }
+    await app.listen(port, host);
+    await fileManagerService.writeConfigFile({
+      ...config,
+      apiServerHost: host,
+      apiServerPort: port,
+      dataFolderPath: dataFolderPath || config.dataFolderPath,
+      cortexCppPort: enginePort,
+    });
+  } catch (e) {
+    console.error(e);
+    // revert the data folder path if it was set
+    await fileManagerService.writeConfigFile({
+      ...config,
+    });
     console.error(`Failed to start server. Is port ${port} in use?`);
   }
 }
-
 /**
  * Stop the API server
  * @returns
@@ -33,12 +97,5 @@ export async function start(host?: string, port?: number) {
 export async function stop(host?: string, port?: number) {
   return fetch(CORTEX_JS_SYSTEM_URL(host, port), {
     method: 'DELETE',
-  })
-    .catch(() => {})
-    .then(() =>
-      fetch(CORTEX_CPP_PROCESS_DESTROY_URL(host, port), {
-        method: 'DELETE',
-      }),
-    )
-    .catch(() => {});
+  });
 }
diff --git a/cortex-js/src/utils/logs.ts b/cortex-js/src/utils/logs.ts
index 3ee06be92..1802d6d2b 100644
--- a/cortex-js/src/utils/logs.ts
+++ b/cortex-js/src/utils/logs.ts
@@ -74,7 +74,7 @@ export async function cleanLogs(
 
   // Schedule the next execution with doubled delays
   timeout = setTimeout(
-    () => this.cleanLogs(maxFileSizeBytes, daysToKeep),
+    () => cleanLogs(maxFileSizeBytes, daysToKeep),
     logCleaningInterval,
   );
 }