diff --git a/README-pt-BR.md b/README-pt-BR.md
index 895e4a17..fd09f9c5 100644
--- a/README-pt-BR.md
+++ b/README-pt-BR.md
@@ -112,7 +112,7 @@ Interested in **translating**?  Please see the following [ticket](https://github
     * [Horizontal scaling](#horizontal-scaling)
 * [Reverse proxy (web server)](#reverse-proxy-web-server)
     * [Load balancer vs reverse proxy](#load-balancer-vs-reverse-proxy)
-* [Application layer](#application-layer)
+* [Camada de aplicação](#camada-de-aplicacao)
     * [Microservices](#microservices)
     * [Service discovery](#service-discovery)
 * [Database](#database)
@@ -707,19 +707,19 @@ Additional benefits include:
 * [HAProxy architecture guide](http://www.haproxy.org/download/1.2/doc/architecture.txt)
 * [Wikipedia](https://en.wikipedia.org/wiki/Reverse_proxy)
 
-## Application layer
+## Camada de Aplicação <a name='camada-de-aplicacao'></a>
 
 <p align="center">
   <img src="http://i.imgur.com/yB5SYwm.png">
   <br/>
-  <i><a href=http://lethain.com/introduction-to-architecting-systems-for-scale/#platform_layer>Source: Intro to architecting systems for scale</a></i>
+  <i><a href=http://lethain.com/introduction-to-architecting-systems-for-scale/#platform_layer>Fonte: Introdução à arquitetura de sistemas escaláveis</a></i>
 </p>
 
-Separating out the web layer from the application layer (also known as platform layer) allows you to scale and configure both layers independently.  Adding a new API results in adding application servers without necessarily adding additional web servers.
+Separar a camada web da camada de aplicação (também conhecida como camada de plataforma) te permite escalar e configurar ambas as camadas independentemente. Adicionar uma nova API resulta em adicionar servidores de aplicação sem necessariamente precisar adicionar novos servidores web.
 
-The **single responsibility principle** advocates for small and autonomous services that work together.  Small teams with small services can plan more aggressively for rapid growth.
+O **princípio de responsabilidade única** defende o uso de serviços pequenos e autônomos que trabalham juntos. Times pequenos com serviços pequenos são capazes de se planejarem melhor e crescerem rapidamente.
 
-Workers in the application layer also help enable [asynchronism](#asynchronism).
+Workers na camada de aplicação também permitem executar tarefas assíncronas [asynchronism](#asynchronism).
 
 ### Microservices