diff --git a/.github/workflows/build_publish.yml b/.github/workflows/build_publish.yml
index 5ab9a3e..dfe5f9c 100644
--- a/.github/workflows/build_publish.yml
+++ b/.github/workflows/build_publish.yml
@@ -27,6 +27,12 @@ jobs:
           MSSQL_SA_PASSWORD: Passw12#
         ports:
           - "1433:1433"
+      postgres:
+        image: postgres:16
+        env:
+          POSTGRES_PASSWORD: Passw12#
+        ports:
+          - "5432:5432"
     env:
       DOTNET_VERSION: 8.0
       DOTNET_SKIP_FIRST_TIME_EXPERIENCE: 1
@@ -82,7 +88,7 @@ jobs:
       - name: Test
         run: dotnet msbuild -t:RunTests -p:Configuration=Release -p:LogFileName="$PWD/../TestResults/tests.trx"
         working-directory: ./backend/tests
-      - name: Integration test
+      - name: Integration Test SqlServer
         run: |
           dotnet test \
           ./tests/LeanCode.AppRating.IntegrationTests/LeanCode.AppRating.IntegrationTests.csproj \
@@ -90,7 +96,18 @@ jobs:
           --logger "trx;LogFileName=LeanCode.AppRating.IntegrationTests.trx" \
           --results-directory TestResults
         env:
+          AppReviewIntegrationTests__Database: sqlserver
           SqlServer__ConnectionStringBase: Server=localhost,1433;User Id=sa;Password=Passw12#;Encrypt=false
+      - name: Integration Test Postgres
+        run: |
+          dotnet test \
+          ./tests/LeanCode.AppRating.IntegrationTests/LeanCode.AppRating.IntegrationTests.csproj \
+          --no-build \
+          --logger "trx;LogFileName=LeanCode.AppRating.IntegrationTests.Postgres.trx" \
+          --results-directory TestResults
+        env:
+          AppReviewIntegrationTests__Database: postgres
+          Postgres__ConnectionStringBase: Host=localhost;Username=postgres;Password=Passw12#
       - name: Upload Test Results
         if: always()
         uses: actions/upload-artifact@v3
@@ -98,19 +115,19 @@ jobs:
           name: test_results.zip
           path: backend/TestResults/*.trx
       - name: Pack AppRating Contracts
-        if: ${{ needs.prepare.outputs.publish_artifacts == '1' }}
+        if: ${{ steps.version.outputs.publish_artifacts == '1' }}
         env:
           BUILD_VERSION: ${{ steps.version.outputs.version }}
         run: dotnet pack --no-build -c Release -p:Version=$BUILD_VERSION
         working-directory: ./backend/src/LeanCode.AppRating.Contracts
       - name: Pack AppRating
-        if: ${{ needs.prepare.outputs.publish_artifacts == '1' }}
+        if: ${{ steps.version.outputs.publish_artifacts == '1' }}
         env:
           BUILD_VERSION: ${{ steps.version.outputs.version }}
         run: dotnet pack --no-build -c Release -p:Version=$BUILD_VERSION
         working-directory: ./backend/src/LeanCode.AppRating
       - name: Publish to Feedz
-        if: ${{ needs.prepare.outputs.publish_artifacts == '1' }}
+        if: ${{ steps.version.outputs.publish_artifacts == '1' }}
         run: |
           dotnet nuget push \
             "src/LeanCode.AppRating.Contracts/bin/Release/LeanCode.AppRating.Contracts.${BUILD_VERSION}.nupkg" \
@@ -122,7 +139,7 @@ jobs:
           BUILD_VERSION: ${{ steps.version.outputs.version }}
           FEEDZ_API_KEY: ${{ secrets.FEEDZ_API_KEY }}
       - name: Publish to Nuget
-        if: ${{ needs.prepare.outputs.publish_nuget == '1' }}
+        if: ${{ steps.version.outputs.publish_nuget == '1' }}
         run: |
           dotnet nuget push \
             "src/LeanCode.AppRating.Contracts/bin/Release/LeanCode.AppRating.Contracts.${BUILD_VERSION}.nupkg" \
diff --git a/backend/Directory.Build.targets b/backend/Directory.Build.targets
index fc7ebd2..b343325 100644
--- a/backend/Directory.Build.targets
+++ b/backend/Directory.Build.targets
@@ -11,6 +11,7 @@
     <PackageReference Update="LeanCode.CQRS.AspNetCore" Version="$(CoreLibVersion)" />
     <PackageReference Update="LeanCode.CQRS.Execution" Version="$(CoreLibVersion)" />
     <PackageReference Update="LeanCode.CQRS.Validation.Fluent" Version="$(CoreLibVersion)" />
+    <PackageReference Update="LeanCode.DomainModels.EF" Version="$(CoreLibVersion)" />
     <PackageReference Update="LeanCode.TimeProvider" Version="$(CoreLibVersion)" />
   </ItemGroup>
 
@@ -18,6 +19,7 @@
     <PackageReference Update="FluentValidation" Version="11.5.1" />
     <PackageReference Update="Microsoft.EntityFrameworkCore" Version="$(EFCoreVersion)" />
     <PackageReference Update="Microsoft.EntityFrameworkCore.Relational" Version="$(EFCoreVersion)" />
+    <PackageReference Update="Npgsql.EntityFrameworkCore.PostgreSQL" Version="8.0.0" />
     <PackageReference Update="Serilog" Version="3.0.1" />
   </ItemGroup>
 
diff --git a/backend/tests/LeanCode.AppRating.IntegrationTests/App/Startup.cs b/backend/tests/LeanCode.AppRating.IntegrationTests/App/Startup.cs
index 1c6a3c6..47444c4 100644
--- a/backend/tests/LeanCode.AppRating.IntegrationTests/App/Startup.cs
+++ b/backend/tests/LeanCode.AppRating.IntegrationTests/App/Startup.cs
@@ -18,16 +18,18 @@ public class Startup : LeanStartup
 {
     public static readonly TypesCatalog Contracts = new(typeof(Startup)); // nothing
     public static readonly TypesCatalog Handlers = new(typeof(Startup)); // nothing
+    private readonly TestDatabaseConfig testDatabaseConfig;
 
     public Startup(IConfiguration config)
-        : base(config) { }
+        : base(config)
+    {
+        testDatabaseConfig = TestDatabaseConfig.Create();
+    }
 
     public override void ConfigureServices(IServiceCollection services)
     {
         services.AddHostedService<DbContextInitializer<TestDbContext>>();
-        services.AddDbContext<TestDbContext>(
-            opts => opts.UseSqlServer(Configuration.GetValue<string>("SqlServer:ConnectionString"))
-        );
+        services.AddDbContext<TestDbContext>(cfg => testDatabaseConfig.ConfigureDbContext(cfg, Configuration));
         services.AddFluentValidation(Handlers);
         services.AddCQRS(Contracts, Handlers).AddAppRating<Guid, TestDbContext, UserIdExtractor>();
 
diff --git a/backend/tests/LeanCode.AppRating.IntegrationTests/App/TestDbContext.cs b/backend/tests/LeanCode.AppRating.IntegrationTests/App/TestDbContext.cs
index d6deb4a..a93a44f 100644
--- a/backend/tests/LeanCode.AppRating.IntegrationTests/App/TestDbContext.cs
+++ b/backend/tests/LeanCode.AppRating.IntegrationTests/App/TestDbContext.cs
@@ -5,14 +5,19 @@ namespace LeanCode.AppRating.IntegrationTests.App;
 
 public class TestDbContext : DbContext, IAppRatingStore<Guid>
 {
+    private readonly TestDatabaseConfig config;
+
     public TestDbContext(DbContextOptions<TestDbContext> options)
-        : base(options) { }
+        : base(options)
+    {
+        config = TestDatabaseConfig.Create();
+    }
 
     public DbSet<AppRatingEntity<Guid>> AppRatings => Set<AppRatingEntity<Guid>>();
 
     protected override void OnModelCreating(ModelBuilder builder)
     {
         base.OnModelCreating(builder);
-        builder.ConfigureAppRatingEntity<Guid>(SqlDbType.MsSql);
+        builder.ConfigureAppRatingEntity<Guid>(config.DbType);
     }
 }
diff --git a/backend/tests/LeanCode.AppRating.IntegrationTests/LeanCode.AppRating.IntegrationTests.csproj b/backend/tests/LeanCode.AppRating.IntegrationTests/LeanCode.AppRating.IntegrationTests.csproj
index abfe092..ea49efe 100644
--- a/backend/tests/LeanCode.AppRating.IntegrationTests/LeanCode.AppRating.IntegrationTests.csproj
+++ b/backend/tests/LeanCode.AppRating.IntegrationTests/LeanCode.AppRating.IntegrationTests.csproj
@@ -8,10 +8,12 @@
   <ItemGroup>
     <PackageReference Include="FluentAssertions" />
     <PackageReference Include="LeanCode.CQRS.AspNetCore" />
+    <PackageReference Include="LeanCode.DomainModels.EF" />
     <PackageReference Include="LeanCode.IntegrationTestHelpers" />
     <PackageReference Include="LeanCode.Startup.MicrosoftDI" />
     <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" />
+    <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" />
     <PackageReference Include="NSubstitute" />
     <PackageReference Include="xunit" />
     <PackageReference Include="xunit.runner.visualstudio" />
diff --git a/backend/tests/LeanCode.AppRating.IntegrationTests/TestBase.cs b/backend/tests/LeanCode.AppRating.IntegrationTests/TestBase.cs
index 12ced01..5110124 100644
--- a/backend/tests/LeanCode.AppRating.IntegrationTests/TestBase.cs
+++ b/backend/tests/LeanCode.AppRating.IntegrationTests/TestBase.cs
@@ -19,8 +19,7 @@ public class TestBase : LeanCodeTestFactory<App.Startup>
 
     protected JsonSerializerOptions JsonSerializerOptions { get; } = new() { };
 
-    protected override ConfigurationOverrides Configuration { get; } =
-        new("SqlServer__ConnectionStringBase", "SqlServer:ConnectionString", Serilog.Events.LogEventLevel.Verbose);
+    protected override ConfigurationOverrides Configuration => TestDatabaseConfig.Create().GetConfigurationOverrides();
 
     public TestBase()
     {
diff --git a/backend/tests/LeanCode.AppRating.IntegrationTests/TestDatabaseConfig.cs b/backend/tests/LeanCode.AppRating.IntegrationTests/TestDatabaseConfig.cs
new file mode 100644
index 0000000..464b9c9
--- /dev/null
+++ b/backend/tests/LeanCode.AppRating.IntegrationTests/TestDatabaseConfig.cs
@@ -0,0 +1,61 @@
+using LeanCode.AppRating.DataAccess;
+using LeanCode.CQRS.MassTransitRelay.LockProviders;
+using LeanCode.DomainModels.EF;
+using LeanCode.IntegrationTestHelpers;
+using MassTransit;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Configuration;
+using Npgsql;
+
+namespace LeanCode.AppRating.IntegrationTests;
+
+public abstract class TestDatabaseConfig
+{
+    public const string ConfigEnvName = "AppReviewIntegrationTests__Database";
+
+    public abstract SqlDbType DbType { get; }
+    public abstract ConfigurationOverrides GetConfigurationOverrides();
+    public abstract void ConfigureDbContext(DbContextOptionsBuilder builder, IConfiguration config);
+
+    public static TestDatabaseConfig Create()
+    {
+        return Environment.GetEnvironmentVariable(ConfigEnvName) switch
+        {
+            "sqlserver" => new SqlServerTestDatabaseConfig(),
+            "postgres" => new PostgresTestConfig(),
+            _
+                => throw new InvalidOperationException(
+                    $"Set the database provider (sqlserver|postgres) via {ConfigEnvName} env variable"
+                ),
+        };
+    }
+}
+
+public class SqlServerTestDatabaseConfig : TestDatabaseConfig
+{
+    public override SqlDbType DbType => SqlDbType.MsSql;
+
+    public override ConfigurationOverrides GetConfigurationOverrides() =>
+        new("SqlServer__ConnectionStringBase", "SqlServer:ConnectionString");
+
+    public override void ConfigureDbContext(DbContextOptionsBuilder builder, IConfiguration config)
+    {
+        builder.UseSqlServer(config.GetValue<string>("SqlServer:ConnectionString"));
+    }
+}
+
+public class PostgresTestConfig : TestDatabaseConfig
+{
+    public override SqlDbType DbType => SqlDbType.PostgreSql;
+
+    public override ConfigurationOverrides GetConfigurationOverrides() =>
+        new("Postgres__ConnectionStringBase", "Postgres:ConnectionString");
+
+    public override void ConfigureDbContext(DbContextOptionsBuilder builder, IConfiguration config)
+    {
+        var dataSource = new NpgsqlDataSourceBuilder(config.GetValue<string>("Postgres:ConnectionString"))
+            .EnableDynamicJson()
+            .Build();
+        builder.UseNpgsql(dataSource);
+    }
+}
diff --git a/backend/tests/LeanCode.AppRating.IntegrationTests/docker-compose.yml b/backend/tests/LeanCode.AppRating.IntegrationTests/docker-compose.yml
index 894b440..c388c79 100644
--- a/backend/tests/LeanCode.AppRating.IntegrationTests/docker-compose.yml
+++ b/backend/tests/LeanCode.AppRating.IntegrationTests/docker-compose.yml
@@ -7,3 +7,9 @@ services:
       - MSSQL_SA_PASSWORD=Passw12#
     ports:
       - "1433:1433"
+  postgres:
+    image: postgres:16
+    environment:
+      POSTGRES_PASSWORD: Passw12#
+    ports:
+      - "5432:5432"