diff --git a/README.md b/README.md
index 3d9e73e..a0e99b1 100644
--- a/README.md
+++ b/README.md
@@ -84,15 +84,25 @@ Install `pnpm`
 Go to `backend` directories, install node dependencies:
 
 ```
-pnpm install
+pnpm i
 ```
 
 1. In `backend`, run the backend server on http://localhost:3000
 
+babel(old school)
+
 ```
 pnpm start
 ```
 
+or
+
+esbuild(experimental)
+
+```
+pnpm run --parallel "/^dev:.*/"
+```
+
 ## LICENSE
 
 This project is under the GPL V3 LICENSE.
diff --git a/backend/dev-esbuild.js b/backend/dev-esbuild.js
new file mode 100644
index 0000000..dd44c57
--- /dev/null
+++ b/backend/dev-esbuild.js
@@ -0,0 +1,24 @@
+#!/usr/bin/env node
+const { build } = require('esbuild');
+
+!(async () => {
+    const artifacts = [{ src: 'src/main.js', dest: 'sub-store.min.js' }];
+
+    for await (const artifact of artifacts) {
+        await build({
+            entryPoints: [artifact.src],
+            bundle: true,
+            minify: false,
+            sourcemap: false,
+            platform: 'node',
+            format: 'cjs',
+            outfile: artifact.dest,
+        });
+    }
+})()
+    .catch((e) => {
+        console.log(e);
+    })
+    .finally(() => {
+        console.log('done');
+    });
diff --git a/backend/package.json b/backend/package.json
index 71e7100..0d0e425 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -8,6 +8,8 @@
     "test": "gulp peggy && npx cross-env BABEL_ENV=test mocha src/test/**/*.spec.js --require @babel/register --recursive",
     "serve": "node sub-store.min.js",
     "start": "nodemon -w src -w package.json --exec babel-node src/main.js",
+    "dev:esbuild": "nodemon -w src -w package.json dev-esbuild.js",
+    "dev:run": "nodemon -w sub-store.json -w sub-store.min.js sub-store.min.js",
     "build": "gulp",
     "bundle": "node bundle.js"
   },
diff --git a/backend/src/core/proxy-utils/index.js b/backend/src/core/proxy-utils/index.js
index 4b535c4..89cc328 100644
--- a/backend/src/core/proxy-utils/index.js
+++ b/backend/src/core/proxy-utils/index.js
@@ -63,7 +63,7 @@ function parse(raw) {
     return proxies;
 }
 
-async function process(proxies, operators = [], targetPlatform, source) {
+async function processFn(proxies, operators = [], targetPlatform, source) {
     for (const item of operators) {
         // process script
         let script;
@@ -188,7 +188,7 @@ function produce(proxies, targetPlatform, type, opts = {}) {
 
 export const ProxyUtils = {
     parse,
-    process,
+    process: processFn,
     produce,
     isIPv4,
     isIPv6,