src/main/java/com/developer/DeveloperService.java

@@ -0,0 +1,22 @@
+package com.developer;
+
+import org.springframework.stereotype.Service;
+
+@Service
+public class DeveloperService {
+
+    public String getRole() {
+        return "developer";
+    }
+
+    public String greet(String name) {
+        if (name == null || name.isBlank()) {
+            return "Hello, Developer!";
+        }
+        return "Hello, " + name + "!";
+    }
+
+    public boolean isValidRole(String role) {
+        return "developer".equalsIgnoreCase(role);
+    }
+}