diff --git a/app/(app)/dashboard/card/CardAvatars.tsx b/app/(app)/dashboard/card/CardAvatars.tsx
index 3f113af..9f0b7d6 100644
--- a/app/(app)/dashboard/card/CardAvatars.tsx
+++ b/app/(app)/dashboard/card/CardAvatars.tsx
@@ -24,7 +24,7 @@ interface UserAvatarProps {
 }
 
 /**
- * Renders a single user avatar circle with optional crown badge.
+ * Renders a single user avatar circle with online status and optional crown badge.
  *
  * @param {UserAvatarProps} props - The component props.
  * @returns {JSX.Element} The rendered user avatar component.
@@ -33,6 +33,7 @@ function UserAvatar({ user, title, isCreator }: UserAvatarProps) {
   const fullName = `${user.firstName} ${user.lastName}`;
   const initials = getInitials(user.firstName, user.lastName);
   const bgColor = user.color;
+  const isOnline = user.isOnline;
 
   return (
     <div
@@ -46,6 +47,10 @@ function UserAvatar({ user, title, isCreator }: UserAvatarProps) {
         {initials}
       </div>
 
+      {isOnline && (
+        <span className="absolute bottom-0 right-0 w-2.5 h-2.5 rounded-full border-2 border-card bg-emerald-500" />
+      )}
+
       {isCreator && (
         <span className="absolute -top-1.5 -right-1.5 w-4 h-4 bg-amber-600 rounded-full border-2 border-border flex items-center justify-center shadow-sm">
           <Crown
diff --git a/app/(app)/dashboard/column/Column.tsx b/app/(app)/dashboard/column/Column.tsx
index 97647ba..1b4d9f1 100644
--- a/app/(app)/dashboard/column/Column.tsx
+++ b/app/(app)/dashboard/column/Column.tsx
@@ -9,25 +9,19 @@ import { useState } from "react";
 import Card from "../card/Card";
 import ColumnHeader from "./ColumnHeader";
 import ColumnEmptyState from "./ColumnEmptyState";
-import { Task, TaskStatus } from "@/types/task";
+import { ColumnConfig, Task, TaskStatus } from "@/types/task";
 
 /**
  * Properties for the Column component.
  *
  * @interface ColumnProps
- * @property {TaskStatus} id - The unique status identifier for the column.
- * @property {string} title - The display title of the column.
- * @property {string} color - The indicator color styling for the column header.
  * @property {number} count - The total count of tasks within this column.
  * @property {Task[]} tasks - The array of tasks belonging to this column.
  * @property {Set<string>} [updatingTaskIds] - A set of task IDs currently undergoing updates.
  * @property {(taskId: string, targetStatus: TaskStatus) => void} [onTaskMove] - Callback triggered when a task is moved to a new status column.
  * @property {(taskId: string) => void} [onTaskDelete] - Callback triggered when a task deletion is requested.
  */
-export interface ColumnProps {
-  id: TaskStatus;
-  title: string;
-  color: string;
+export interface ColumnProps extends ColumnConfig {
   count: number;
   tasks: Task[];
   updatingTaskIds?: Set<string>;
diff --git a/app/components/layout/UserBadge.tsx b/app/components/layout/UserBadge.tsx
index 98f7625..6cb9a73 100644
--- a/app/components/layout/UserBadge.tsx
+++ b/app/components/layout/UserBadge.tsx
@@ -1,6 +1,6 @@
 /**
  * @file UserBadge.tsx
- * @description Server component rendering the authenticated user profile badge with initials and name.
+ * @description Server component rendering the authenticated user profile badge with initials, name, and online status.
  */
 
 import { auth } from "@/auth";
@@ -8,7 +8,7 @@ import { UserService } from "@/services/user.service";
 import { getInitials } from "@/utils/user";
 
 /**
- * Renders a user profile badge including an avatar initial circle with user color and full name.
+ * Renders a user profile badge including an avatar initial circle with user color, full name, and online status indicator.
  *
  * @async
  * @returns {Promise<JSX.Element | null>} The rendered user badge component, or null if unauthenticated.
@@ -22,19 +22,41 @@ export default async function UserBadge() {
 
   const fullName = `${user.firstName} ${user.lastName}`.trim();
   const initials = getInitials(user.firstName, user.lastName);
-  const bgColor = user.color || "bg-primary";
+  const bgColor = user.color;
+  const lastLogin = user.lastLogin;
+
+  const formattedLastLogin = new Date(lastLogin!).toLocaleString("de-DE", {
+    day: "2-digit",
+    month: "2-digit",
+    year: "numeric",
+    hour: "2-digit",
+    minute: "2-digit",
+  });
 
   return (
-    <div className="flex items-center gap-3">
-      <div
-        className={`w-10 h-10 rounded-full flex items-center justify-center text-lg font-black tracking-wider text-white shadow-md border-2 border-card ring-2 ring-border/50 shrink-0 ${bgColor}`}
-        style={{ textShadow: "0 1px 2px rgba(0, 0, 0, 0.8)" }}
-      >
-        {initials}
+    <div
+      className="flex items-center gap-3"
+      title={`Last Login: ${formattedLastLogin}`}
+    >
+      <div className="relative shrink-0">
+        <div
+          className={`w-10 h-10 rounded-full flex items-center justify-center text-lg font-black tracking-wider text-white shadow-md border-2 border-card ring-2 ring-border/50 ${bgColor}`}
+          style={{ textShadow: "0 1px 2px rgba(0, 0, 0, 0.8)" }}
+        >
+          {initials}
+        </div>
+
+        <span
+          className="absolute bottom-0 right-0 w-3 h-3 rounded-full border-2 border-card bg-emerald-500"
+          title="Online"
+        />
       </div>
+
       <div className="hidden sm:block text-left">
         <p className="text-sm font-medium leading-tight">{fullName}</p>
-        <p className="text-foreground-muted text-xs">Online</p>
+        <p className="text-foreground-muted text-xs flex items-center gap-1.5">
+          Online
+        </p>
       </div>
     </div>
   );
diff --git a/app/components/ui/buttons/SignOutButton.tsx b/app/components/ui/buttons/SignOutButton.tsx
index 4398fd5..bd62a68 100644
--- a/app/components/ui/buttons/SignOutButton.tsx
+++ b/app/components/ui/buttons/SignOutButton.tsx
@@ -1,24 +1,19 @@
 /**
  * @file SignOutButton.tsx
- * @description Server Action-powered client component that allows users to sign out and redirect to the home page.
+ * @description Server Action-powered client component rendering a sign-out button that triggers session termination via a server action.
  */
 
-import { signOut } from "@/auth";
+import { handleSignOut } from "@/auth";
 import { LogOut } from "lucide-react";
 
 /**
- * Renders a sign-out button using a Server Action to securely terminate the user session.
+ * Renders a form containing a submit button to securely sign out the current user session using a server action.
  *
  * @returns {JSX.Element} The rendered sign-out button component.
  */
 export default function SignOutButton() {
   return (
-    <form
-      action={async () => {
-        "use server";
-        await signOut({ redirectTo: "/" });
-      }}
-    >
+    <form action={handleSignOut}>
       <button
         type="submit"
         className="flex items-center gap-2 px-3 py-2 rounded-lg text-xs font-medium hover:text-primary-hover transition-colors w-full cursor-pointer"
diff --git a/auth.ts b/auth.ts
index c4f9bfa..3252851 100644
--- a/auth.ts
+++ b/auth.ts
@@ -1,6 +1,6 @@
 /**
  * @file auth.ts
- * @description NextAuth configuration file setting up credentials authentication, database lookups via Drizzle, JWT sessions, and custom pages.
+ * @description NextAuth configuration file setting up credentials authentication, database lookups via Drizzle, JWT sessions, custom pages, and a secure server-side sign out handler.
  */
 
 import NextAuth from "next-auth";
@@ -21,11 +21,12 @@ export const { handlers, auth, signIn, signOut } = NextAuth({
         password: { label: "Password", type: "password" },
       },
       /**
-       * Authorizes a user by verifying their email and comparing hashed passwords from the database.
+       * Authorizes a user by verifying their email and comparing hashed passwords from the database,
+       * updating login tracking info upon success.
        *
        * @async
        * @param {Record<string, any>} [credentials] - The user credentials submitted via the sign-in form.
-       * @returns {Promise<{ id: string; email: string } | null>} The authenticated user object or null if authorization fails.
+       * @returns {Promise<{ id: string } | null>} The authenticated user object containing the ID or null if authorization fails.
        */
       async authorize(credentials) {
         if (!credentials?.email || !credentials?.password) return null;
@@ -43,7 +44,15 @@ export const { handlers, auth, signIn, signOut } = NextAuth({
 
         if (!passwordsMatch) return null;
 
-        return { id: String(user.id), email: user.email };
+        await db
+          .update(usersTable)
+          .set({
+            lastLogin: new Date(),
+            isOnline: true,
+          })
+          .where(eq(usersTable.id, user.id));
+
+        return { id: String(user.id) };
       },
     }),
   ],
@@ -86,3 +95,25 @@ export const { handlers, auth, signIn, signOut } = NextAuth({
     },
   },
 });
+
+/**
+ * Handles the secure logout process, setting the user's online status to false in the database
+ * and destroying the active session.
+ *
+ * @async
+ * @returns {Promise<void>}
+ */
+export async function handleSignOut() {
+  "use server";
+
+  const session = await auth();
+
+  if (session?.user?.id) {
+    await db
+      .update(usersTable)
+      .set({ isOnline: false })
+      .where(eq(usersTable.id, session.user.id));
+  }
+
+  await signOut({ redirectTo: "/" });
+}
diff --git a/db/schema.ts b/db/schema.ts
index 9862a7d..6a3940f 100644
--- a/db/schema.ts
+++ b/db/schema.ts
@@ -4,6 +4,7 @@
  */
 
 import {
+  boolean,
   pgEnum,
   pgTable,
   primaryKey,
@@ -49,6 +50,8 @@ export const usersTable = pgTable("users", {
   firstName: text("first_name").notNull(),
   lastName: text("last_name").notNull(),
   color: text("color").default("bg-indigo-500").notNull(),
+  lastLogin: timestamp("last_login"),
+  isOnline: boolean("is_online").default(false).notNull(),
   createdAt: timestamp("created_at").defaultNow().notNull(),
 });
 
diff --git a/services/user.service.ts b/services/user.service.ts
index d25aced..bcb3c62 100644
--- a/services/user.service.ts
+++ b/services/user.service.ts
@@ -12,11 +12,11 @@ import { eq } from "drizzle-orm";
  */
 export class UserService {
   /**
-   * Retrieves specific profile information (firstName, lastName, color) for a user by ID.
+   * Retrieves specific profile information (firstName, lastName, color, online status) for a user by ID.
    *
    * @async
    * @param {string} userId - The unique identifier of the user.
-   * @returns {Promise<{ firstName: string; lastName: string; color: string } | null>} The user profile data or null.
+   * @returns {Promise<{ firstName: string; lastName: string; color: string; isOnline: boolean; lastLogin: Date } | null>} The user profile data or null.
    */
   static async findProfileById(userId: string) {
     const [user] = await db
@@ -24,6 +24,8 @@ export class UserService {
         firstName: usersTable.firstName,
         lastName: usersTable.lastName,
         color: usersTable.color,
+        isOnline: usersTable.isOnline,
+        lastLogin: usersTable.lastLogin,
       })
       .from(usersTable)
       .where(eq(usersTable.id, userId));
diff --git a/types/task.ts b/types/task.ts
index 8cec935..767a4c6 100644
--- a/types/task.ts
+++ b/types/task.ts
@@ -33,6 +33,12 @@ export interface TaskPriorityConfig {
   className: string;
 }
 
+export interface ColumnConfig {
+  id: TaskStatus;
+  title: string;
+  color: string;
+}
+
 export interface RouteContext {
   params: Promise<{ id: string }>;
 }
@@ -61,4 +67,4 @@ export const COLUMNS = [
   { id: "in_progress", title: "In Progress", color: "bg-indigo-500" },
   { id: "await_feedback", title: "Await Feedback", color: "bg-amber-500" },
   { id: "done", title: "Done", color: "bg-emerald-500" },
-] as const;
+] as const satisfies readonly ColumnConfig[];