diff --git a/.gitignore b/.gitignore
new file mode 100644
index 00000000..45aef93a
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,5 @@
+.env
+/node_modules
+/.idea
+yarn.lock
+package-lock.json
diff --git a/doc/README.md b/doc/README.md
new file mode 100644
index 00000000..376bd81a
--- /dev/null
+++ b/doc/README.md
@@ -0,0 +1,29 @@
+# NODE JS
+
+
+## Para rodar este projeto
+```bash
+$ npm install
+$ node run start
+```
+Acesssar pela url: http://localhost:8000/ #neste caso a porta esta a padrão, mais pode ser alterada se necessário, PS: o link para acesso é mostrado quando o comardo anterior é executado.
+
+
+
+## Acesso
+- Utilizando o POSTMAN, Insomnia ou alguma outra ferramente do tipo, deve ser feita uma requisição 'POST'.
+- url: http://localhost:3000, passando como parametro obrigatório uma matriz quadrada.
+- Variável referente a matriz que deve ser passada na requisição deve-se chamar 'matrix'.
+
+## Exemplo da Variável
+{
+  "matrix": [
+			[1, 2, 3, 6],
+			[4, 5, 6, 3],
+			[9, 5, 7, 0],
+			[4, 8, 9, 0]
+		]
+}
+
+## Observação
+- A aplicação esta mapeada para a porta 3000.
diff --git a/package.json b/package.json
new file mode 100644
index 00000000..8c20069e
--- /dev/null
+++ b/package.json
@@ -0,0 +1,31 @@
+{
+  "name": "backend-challenge",
+  "version": "1.0.0",
+  "description": "Esse repositório é o nosso desafio para avaliar o quão bom desenvolvedor back-end você é.",
+  "main": "src/server.js",
+  "dependencies": {
+    "body-parser": "^1.18.3",
+    "express": "^4.15.4",
+    "express-validator": "^6.9.2",
+    "mongoose": "^5.0.16",
+    "redis": "^2.8.0"
+  },
+  "devDependencies": {
+    "nodemon": "^1.17.3"
+  },
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "start": "nodemon"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/jlaurosouza/backend-challenge.git"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "bugs": {
+    "url": "https://github.com/jlaurosouza/backend-challenge/issues"
+  },
+  "homepage": "https://github.com/jlaurosouza/backend-challenge#readme"
+}
diff --git a/src/app.js b/src/app.js
new file mode 100644
index 00000000..ba22b4d1
--- /dev/null
+++ b/src/app.js
@@ -0,0 +1,16 @@
+const express = require('express');
+const app = express();
+const bodyParser = require('body-parser');
+
+const router = express.Router();
+
+//Rotas
+const index = require('./routes/index');
+const homeRoute = require('./routes/homeRoute');
+
+app.use(bodyParser.urlencoded({ extended: true }))
+app.use(bodyParser.json())
+
+app.use('/', homeRoute);
+
+module.exports = app;
\ No newline at end of file
diff --git a/src/controllers/homeController.js b/src/controllers/homeController.js
new file mode 100644
index 00000000..7d9c6e26
--- /dev/null
+++ b/src/controllers/homeController.js
@@ -0,0 +1,33 @@
+exports.get = (req, res, next) => {
+    res.status(200).send('utiliza a rota post');
+};
+
+exports.post = (req, res, next) => {
+    try {
+        const { body } = req;
+        const { matrix } = body;
+        
+        let lengthMatrix = matrix.length;                    
+        let diagonalLeftToRight = 0;
+        let diagonalRightToLeft = 0;
+        
+        for(let i = 0; i < matrix.length; i++){        
+            diagonalLeftToRight = diagonalLeftToRight + matrix[i][i];
+            diagonalRightToLeft = diagonalRightToLeft + matrix[i][--lengthMatrix];
+        }
+
+        const diff = diagonalLeftToRight - diagonalRightToLeft;
+
+        
+        return res.json({
+            success: 200,
+            data: `A diferença da matriz é ${diff}` 
+        });
+    } catch (e) {
+        console.log(e)
+        return res.json({
+            error: 400,
+            data: 'Não foi possível identificar a diferença da matriz.'
+        });
+    }
+}
\ No newline at end of file
diff --git a/src/helpers/validatorHelper.js b/src/helpers/validatorHelper.js
new file mode 100644
index 00000000..df825b5b
--- /dev/null
+++ b/src/helpers/validatorHelper.js
@@ -0,0 +1,12 @@
+const validationResult = require('express-validator').validationResult;
+
+module.exports = {  
+    check(req, res, next) {
+      const errors = validationResult(req);
+
+      if (!errors.isEmpty()) {
+        return res.status(400).json({ message: errors.array() });
+      }
+      return next();
+    }
+}
diff --git a/src/routes/homeRoute.js b/src/routes/homeRoute.js
new file mode 100644
index 00000000..0d0a6ddc
--- /dev/null
+++ b/src/routes/homeRoute.js
@@ -0,0 +1,10 @@
+const express = require('express');
+const router = express.Router();
+const homeController = require('../controllers/homeController');
+const homeValidator = require('../validators/homeValidator');
+const ValidatorHelper = require('../helpers/validatorHelper');
+
+router.get('/', homeController.get);
+router.post('/', homeValidator.postRules, ValidatorHelper.check, homeController.post);
+
+module.exports = router;
\ No newline at end of file
diff --git a/src/routes/index.js b/src/routes/index.js
new file mode 100644
index 00000000..8d4c81d4
--- /dev/null
+++ b/src/routes/index.js
@@ -0,0 +1,12 @@
+
+const express = require('express');
+const router = express.Router();
+
+router.get('/', function (req, res, next) {
+    res.status(200).send({
+        title: "Node Express API",
+        version: "0.0.1"
+    });
+});
+
+module.exports = router;
diff --git a/src/server.js b/src/server.js
new file mode 100644
index 00000000..fd3c91cf
--- /dev/null
+++ b/src/server.js
@@ -0,0 +1,20 @@
+const app = require('./app');
+
+const port = normalizaPort(process.env.PORT || '3000');
+
+function normalizaPort(val) {
+    const port = parseInt(val, 10);
+    if (isNaN(port)) {
+        return val;
+    }
+
+    if (port >= 0) {
+        return port;
+    }
+
+    return false;
+}
+
+app.listen(port, function () {
+    console.log(`app listening on port ${port}`)
+})
\ No newline at end of file
diff --git a/src/validators/homeValidator.js b/src/validators/homeValidator.js
new file mode 100644
index 00000000..abad7f5d
--- /dev/null
+++ b/src/validators/homeValidator.js
@@ -0,0 +1,19 @@
+const check = require('express-validator').check;
+
+module.exports = {
+    postRules:[
+        check('matrix')
+            .exists().withMessage("Por favor informa uma matriz quadrada")
+            .custom((matrix) => {
+                return new Promise((resolve, reject) => {
+                    const lengthMatrix = matrix.length;                    
+                    matrix.map(mat => {
+                        if (mat.length != lengthMatrix){
+                            reject();
+                        }
+                    })
+                    resolve();                    
+                });                
+            }).withMessage("A matriz não é quadrada, favor nformar uma outra matriz")
+    ]
+};