diff --git a/.github/workflows/ant.yml b/.github/workflows/ant.yml
deleted file mode 100644
index 06fc807..0000000
--- a/.github/workflows/ant.yml
+++ /dev/null
@@ -1,25 +0,0 @@
-# This workflow will build a Java project with Ant
-# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-java-with-ant
-
-name: Java CI
-
-on:
-  push:
-    branches: [ "main" ]
-  pull_request:
-    branches: [ "main" ]
-
-jobs:
-  build:
-
-    runs-on: ubuntu-latest
-
-    steps:
-    - uses: actions/checkout@v4
-    - name: Set up JDK 11
-      uses: actions/setup-java@v4
-      with:
-        java-version: '11'
-        distribution: 'temurin'
-    - name: Build with Ant
-      run: ant -noinput -buildfile build.xml
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..8ea9e84
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,26 @@
+name: Java CI
+
+on:
+  push:
+    branches: ["main"]
+  pull_request:
+    branches: ["main"]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up JDK 21
+        uses: actions/setup-java@v5
+        with:
+          java-version: "21"
+          distribution: "temurin"
+          cache: "maven"
+
+      - name: Build backend
+        working-directory: backend
+        run: ./mvnw clean test
diff --git a/backend/.gitignore b/backend/.gitignore
index 8252ca8..166c53c 100644
--- a/backend/.gitignore
+++ b/backend/.gitignore
@@ -33,3 +33,4 @@ build/
 
 ### Environment ###
 .env
+.env
diff --git a/backend/src/main/java/com/studentos/dto/StudentProfileResponse.java b/backend/src/main/java/com/studentos/dto/StudentProfileResponse.java
index 09c6077..3352929 100644
--- a/backend/src/main/java/com/studentos/dto/StudentProfileResponse.java
+++ b/backend/src/main/java/com/studentos/dto/StudentProfileResponse.java
@@ -4,7 +4,6 @@
 import java.time.Instant;
 import java.util.List;
 import java.util.UUID;
-
 public record StudentProfileResponse(
         UUID id,
         String college,
diff --git a/backend/src/main/java/com/studentos/dto/UserMapper.java b/backend/src/main/java/com/studentos/dto/UserMapper.java
index ab675ba..a53d0e5 100644
--- a/backend/src/main/java/com/studentos/dto/UserMapper.java
+++ b/backend/src/main/java/com/studentos/dto/UserMapper.java
@@ -13,6 +13,7 @@ private UserMapper() {
 
     public static UserResponse toResponse(User user) {
         StudentProfile profile = user.getStudentProfile();
+
         StudentProfileResponse profileResponse = profile == null ? null : new StudentProfileResponse(
                 profile.getId(),
                 profile.getCollege(),
diff --git a/backend/src/main/resources/application.yml b/backend/src/main/resources/application.yml
index 7c388de..aa66be2 100644
--- a/backend/src/main/resources/application.yml
+++ b/backend/src/main/resources/application.yml
@@ -1,5 +1,3 @@
-spring:
-  application:
     name: studentos-backend
   datasource:
     url: ${DATABASE_URL:jdbc:postgresql://localhost:5432/studentos}
@@ -20,12 +18,8 @@ spring:
       host: ${REDIS_HOST:localhost}
       port: ${REDIS_PORT:6379}
 
-server:
-  port: 8080
 
-app:
-  jwt:
-    secret: ${JWT_SECRET:change-me-to-a-long-random-secret-at-least-256-bits}
+  secret: ${JWT_SECRET:change-me-to-a-long-random-secret-at-least-256-bits}
     access-expiration-ms: ${JWT_ACCESS_EXPIRATION_MS:900000}
     refresh-expiration-ms: ${JWT_REFRESH_EXPIRATION_MS:604800000}
   cors: