diff --git a/backend/app/Models/Company.php b/backend/app/Models/Company.php
index 6320e72..f98416b 100644
--- a/backend/app/Models/Company.php
+++ b/backend/app/Models/Company.php
@@ -23,6 +23,16 @@ class Company extends Model
         'hiring'
     ];
 
+    /**
+     * The attributes that should be hidden for serialization.
+     *
+     * @var list<string>
+     */
+    protected $hidden = [
+        'created_at',
+        'updated_at',
+    ];
+
     /**
      * Get the internships for the company.
      */
@@ -34,7 +44,7 @@ class Company extends Model
     /**
      * Get the contact person (user) for the company.
      */
-    public function contactPerson()
+    public function contact()
     {
         return $this->belongsTo(User::class, 'contact');
     }
diff --git a/backend/app/Models/Internship.php b/backend/app/Models/Internship.php
index 82dcd51..4330fee 100644
--- a/backend/app/Models/Internship.php
+++ b/backend/app/Models/Internship.php
@@ -2,6 +2,7 @@
 
 namespace App\Models;
 
+use Carbon\Carbon;
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Model;
 
@@ -28,6 +29,16 @@ class Internship extends Model
         'report_confirmed',
     ];
 
+    /**
+     * The attributes that should be hidden for serialization.
+     *
+     * @var list<string>
+     */
+    protected $hidden = [
+        'created_at',
+        'updated_at',
+    ];
+
     /**
      * Get the attributes that should be cast.
      *
@@ -49,4 +60,32 @@ class Internship extends Model
     {
         return $this->belongsTo(Company::class, 'company_id');
     }
+
+    public function status()
+    {
+        return $this->hasOne(InternshipStatus::class, 'internship_id')->latestOfMany();
+    }
+
+    /**
+     * Prepare the model for JSON serialization.
+     *
+     * @return array<string, mixed>
+     */
+    public function toArray(): array
+    {
+        return [
+            'id' => $this->id,
+            'student' => $this->student,
+            'company' => $this->company,
+            'start' => Carbon::parse($this->start)->format('d.m.Y'),
+            'end' => Carbon::parse($this->end)->format('d.m.Y'),
+            'year_of_study' => $this->year_of_study,
+            'semester' => $this->semester,
+            'position_description' => $this->position_description,
+            'agreement' => $this->agreement !== null,
+            'report' => $this->report !== null,
+            'report_confirmed' => $this->report_confirmed,
+            'status' => $this->status,
+        ];
+    }
 }
diff --git a/backend/app/Models/InternshipStatus.php b/backend/app/Models/InternshipStatus.php
index 4272c86..fc41517 100644
--- a/backend/app/Models/InternshipStatus.php
+++ b/backend/app/Models/InternshipStatus.php
@@ -22,4 +22,31 @@ class InternshipStatus extends Model
         'note',
         'modified_by'
     ];
+
+    /**
+     * The attributes that should be hidden for serialization.
+     *
+     * @var list<string>
+     */
+    protected $hidden = [
+        'created_at',
+        'updated_at',
+    ];
+
+    public function modifiedBy()
+    {
+        return $this->belongsTo(User::class, 'modified_by');
+    }
+
+    public function toArray()
+    {
+        return [
+            'id' => $this->id,
+            'internship_id' => $this->internship_id,
+            'status' => $this->status,
+            'changed' => $this->changed,
+            'note' => $this->note,
+            'modified_by' => $this->modifiedBy,
+        ];
+    }
 }
diff --git a/backend/app/Models/StudentData.php b/backend/app/Models/StudentData.php
index 8490416..d9fb90f 100644
--- a/backend/app/Models/StudentData.php
+++ b/backend/app/Models/StudentData.php
@@ -21,4 +21,14 @@ class StudentData extends Model
         'personal_email',
         'study_field',
     ];
+
+    /**
+     * The attributes that should be hidden for serialization.
+     *
+     * @var list<string>
+     */
+    protected $hidden = [
+        'created_at',
+        'updated_at',
+    ];
 }
diff --git a/backend/app/Models/User.php b/backend/app/Models/User.php
index c80bbdc..744275f 100644
--- a/backend/app/Models/User.php
+++ b/backend/app/Models/User.php
@@ -39,6 +39,11 @@ class User extends Authenticatable
         'password',
         'remember_token',
         'activation_token',
+        'created_at',
+        'updated_at',
+        'email_verified_at',
+        'active',
+        'needs_password_change'
     ];
 
     /**