diff --git a/.gitignore b/.gitignore
index f328e6b..55ee0ec 100644
--- a/.gitignore
+++ b/.gitignore
@@ -57,3 +57,6 @@ bin/
 ### OpenAPI ###
 legalconsenthub/.api-client
 legalconsenthub/.api-client-middleware
+
+### PostgreSQL persistent data ###
+legalconsenthub-backend/postgres-data/
diff --git a/.run/local-server-backend-postgres.run.xml b/.run/local-server-backend-postgres.run.xml
new file mode 100644
index 0000000..2517fa6
--- /dev/null
+++ b/.run/local-server-backend-postgres.run.xml
@@ -0,0 +1,13 @@
+<component name="ProjectRunConfigurationManager">
+  <configuration default="false" name="local-server-backend-postgres" type="SpringBootApplicationConfigurationType" factoryName="Spring Boot">
+    <option name="ACTIVE_PROFILES" value="postgres" />
+    <option name="ALTERNATIVE_JRE_PATH" value="ms-21" />
+    <option name="ALTERNATIVE_JRE_PATH_ENABLED" value="true" />
+    <module name="com.betriebsratkanzlei.legalconsenthub.main" />
+    <option name="SPRING_BOOT_MAIN_CLASS" value="com.betriebsratkanzlei.legalconsenthub.LegalconsenthubApplication" />
+    <option name="WORKING_DIRECTORY" value="$PROJECT_DIR$/legalconsenthub-backend" />
+    <method v="2">
+      <option name="Make" enabled="true" />
+    </method>
+  </configuration>
+</component>
diff --git a/.run/local-server-backend-testcontainers.run.xml b/.run/local-server-backend-testcontainers.run.xml
new file mode 100644
index 0000000..75e97d9
--- /dev/null
+++ b/.run/local-server-backend-testcontainers.run.xml
@@ -0,0 +1,13 @@
+<component name="ProjectRunConfigurationManager">
+  <configuration default="false" name="local-server-backend-testcontainers" type="SpringBootApplicationConfigurationType" factoryName="Spring Boot">
+    <option name="ACTIVE_PROFILES" value="testcontainers" />
+    <option name="ALTERNATIVE_JRE_PATH" value="ms-21" />
+    <option name="ALTERNATIVE_JRE_PATH_ENABLED" value="true" />
+    <module name="com.betriebsratkanzlei.legalconsenthub.main" />
+    <option name="SPRING_BOOT_MAIN_CLASS" value="com.betriebsratkanzlei.legalconsenthub.LegalconsenthubApplication" />
+    <option name="WORKING_DIRECTORY" value="$PROJECT_DIR$/legalconsenthub-backend" />
+    <method v="2">
+      <option name="Make" enabled="true" />
+    </method>
+  </configuration>
+</component>
diff --git a/legalconsenthub-backend/docker-compose.yml b/legalconsenthub-backend/docker-compose.yml
new file mode 100644
index 0000000..7762883
--- /dev/null
+++ b/legalconsenthub-backend/docker-compose.yml
@@ -0,0 +1,20 @@
+version: '3.8'
+
+services:
+  postgres:
+    image: postgres:17-alpine
+    container_name: legalconsenthub-postgres
+    environment:
+      POSTGRES_DB: legalconsenthub
+      POSTGRES_USER: legalconsenthub
+      POSTGRES_PASSWORD: legalconsenthub
+    ports:
+      - "5432:5432"
+    volumes:
+      - ./postgres-data:/var/lib/postgresql/data
+    restart: unless-stopped
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -U legalconsenthub -d legalconsenthub"]
+      interval: 10s
+      timeout: 5s
+      retries: 5
diff --git a/legalconsenthub-backend/src/main/resources/application-postgres.yaml b/legalconsenthub-backend/src/main/resources/application-postgres.yaml
new file mode 100644
index 0000000..40884c9
--- /dev/null
+++ b/legalconsenthub-backend/src/main/resources/application-postgres.yaml
@@ -0,0 +1,41 @@
+spring:
+  application:
+    name: legalconsenthub
+
+  datasource:
+    hikari:
+      auto-commit: false
+    url: jdbc:postgresql://localhost:5432/legalconsenthub
+    username: legalconsenthub
+    password: legalconsenthub
+    driver-class-name: org.postgresql.Driver
+
+  jpa:
+    database-platform: org.hibernate.dialect.PostgreSQLDialect
+    hibernate:
+      ddl-auto: validate
+    show-sql: true
+    properties:
+      hibernate:
+        format_sql: true
+        jdbc:
+          batch_size: 100
+          order_inserts: true
+          enable_lazy_load_no_trans: true
+
+  liquibase:
+    enabled: true
+    drop-first: false
+    change-log: classpath:/db/changelog/db.changelog-master.yaml
+    default-schema: public
+
+  sql:
+    init:
+      platform: postgresql
+
+logging:
+  level:
+    org:
+      springframework:
+        security: TRACE
+        oauth2: TRACE
diff --git a/legalconsenthub-backend/src/main/resources/testcontainers.properties b/legalconsenthub-backend/src/main/resources/testcontainers.properties
new file mode 100644
index 0000000..f0e6e42
--- /dev/null
+++ b/legalconsenthub-backend/src/main/resources/testcontainers.properties
@@ -0,0 +1 @@
+testcontainers.reuse.enable=true