diff --git a/amethyst/src/main/java/com/vitorpamplona/amethyst/service/notifications/EventNotificationConsumer.kt b/amethyst/src/main/java/com/vitorpamplona/amethyst/service/notifications/EventNotificationConsumer.kt
index 5860829872..1a0fed0dc5 100644
--- a/amethyst/src/main/java/com/vitorpamplona/amethyst/service/notifications/EventNotificationConsumer.kt
+++ b/amethyst/src/main/java/com/vitorpamplona/amethyst/service/notifications/EventNotificationConsumer.kt
@@ -69,6 +69,7 @@ import com.vitorpamplona.quartz.nip22Comments.CommentEvent
 import com.vitorpamplona.quartz.nip23LongContent.LongTextNoteEvent
 import com.vitorpamplona.quartz.nip25Reactions.ReactionEvent
 import com.vitorpamplona.quartz.nip28PublicChat.message.ChannelMessageEvent
+import com.vitorpamplona.quartz.nip30CustomEmoji.CustomEmoji
 import com.vitorpamplona.quartz.nip34Git.issue.GitIssueEvent
 import com.vitorpamplona.quartz.nip34Git.patch.GitPatchEvent
 import com.vitorpamplona.quartz.nip54Wiki.WikiNoteEvent
@@ -766,14 +767,24 @@ class EventNotificationConsumer(
         val userPicture = author.profilePicture()
 
         val reactionContent = event.content
-        val reactionSymbol =
-            when {
-                reactionContent == ReactionEvent.LIKE || reactionContent.isBlank() -> "\uD83E\uDD19"
-                reactionContent == ReactionEvent.DISLIKE -> "\uD83D\uDC4E"
-                else -> reactionContent
-            }
 
-        val title = "$reactionSymbol $user"
+        // NIP-30 custom emoji: content is ":shortcode:" backed by an ["emoji", shortcode, url]
+        // tag. The image can't be rendered as text, so it is surfaced as a badge on the author's
+        // avatar (see sendReactionNotification) and the title keeps just the author's name.
+        val customEmojiUrl = CustomEmoji.createEmojiMap(event.tags)[reactionContent]
+
+        val title =
+            if (customEmojiUrl != null) {
+                user
+            } else {
+                val reactionSymbol =
+                    when {
+                        reactionContent == ReactionEvent.LIKE || reactionContent.isBlank() -> "\uD83E\uDD19"
+                        reactionContent == ReactionEvent.DISLIKE -> "\uD83D\uDC4E"
+                        else -> reactionContent
+                    }
+                "$reactionSymbol $user"
+            }
 
         val reactedContent =
             reactedNote
@@ -813,6 +824,7 @@ class EventNotificationConsumer(
                 userPicture,
                 noteUri,
                 applicationContext,
+                emojiUrl = customEmojiUrl,
             )
     }
 
diff --git a/amethyst/src/main/java/com/vitorpamplona/amethyst/service/notifications/NotificationUtils.kt b/amethyst/src/main/java/com/vitorpamplona/amethyst/service/notifications/NotificationUtils.kt
index 27b56d05bd..600939abe7 100644
--- a/amethyst/src/main/java/com/vitorpamplona/amethyst/service/notifications/NotificationUtils.kt
+++ b/amethyst/src/main/java/com/vitorpamplona/amethyst/service/notifications/NotificationUtils.kt
@@ -26,6 +26,9 @@ import android.app.PendingIntent
 import android.content.Context
 import android.content.Intent
 import android.graphics.Bitmap
+import android.graphics.Canvas
+import android.graphics.Paint
+import android.graphics.RectF
 import android.graphics.drawable.BitmapDrawable
 import android.service.notification.StatusBarNotification
 import androidx.core.app.NotificationCompat
@@ -221,6 +224,7 @@ object NotificationUtils {
         pictureUrl: String?,
         uri: String,
         applicationContext: Context,
+        emojiUrl: String? = null,
     ) {
         getOrCreateReactionChannel(applicationContext)
         val channelId = stringRes(applicationContext, R.string.app_notification_reactions_channel_id)
@@ -231,6 +235,7 @@ object NotificationUtils {
             messageTitle = messageTitle,
             time = time,
             pictureUrl = pictureUrl,
+            badgeUrl = emojiUrl,
             uri = uri,
             channelId = channelId,
             notificationGroupKey = REACTION_GROUP_KEY,
@@ -423,6 +428,36 @@ object NotificationUtils {
             }
         }
 
+    /**
+     * Draws the badge image (e.g. a NIP-30 custom-emoji reaction) onto the bottom-right corner
+     * of the base avatar. Returns the base unchanged if the badge can't be loaded, or the badge
+     * alone if there is no base avatar.
+     */
+    private suspend fun overlayBadge(
+        base: Bitmap?,
+        badgeUrl: String,
+        applicationContext: Context,
+    ): Bitmap? {
+        val badge = loadBitmap(badgeUrl, applicationContext) ?: return base
+        if (base == null) return badge
+
+        return withContext(Dispatchers.Default) {
+            val result = base.copy(base.config ?: Bitmap.Config.ARGB_8888, true)
+            val canvas = Canvas(result)
+            val badgeSize = minOf(result.width, result.height) * 0.45f
+            val dest =
+                RectF(
+                    result.width - badgeSize,
+                    result.height - badgeSize,
+                    result.width.toFloat(),
+                    result.height.toFloat(),
+                )
+            val paint = Paint(Paint.ANTI_ALIAS_FLAG).apply { isFilterBitmap = true }
+            canvas.drawBitmap(badge, null, dest, paint)
+            result
+        }
+    }
+
     private suspend fun NotificationManager.sendDMNotificationStyled(
         id: String,
         messageBody: String,
@@ -625,6 +660,7 @@ object NotificationUtils {
         summaryText: String,
         applicationContext: Context,
         inlineReply: InlineReplyTarget? = null,
+        badgeUrl: String? = null,
     ) {
         val notId = id.hashCode()
 
@@ -632,6 +668,10 @@ object NotificationUtils {
 
         val bitmap = pictureUrl?.let { loadBitmap(it, applicationContext) }
 
+        // For custom-emoji (NIP-30) reactions, the emoji is an image URL that can't render
+        // as text in the notification, so overlay it as a badge on the author's avatar.
+        val largeIcon = badgeUrl?.let { overlayBadge(bitmap, it, applicationContext) } ?: bitmap
+
         val contentIntent =
             Intent(applicationContext, MainActivity::class.java).apply { data = uri.toUri() }
 
@@ -662,7 +702,7 @@ object NotificationUtils {
                 .setContentTitle(messageTitle)
                 .setContentText(messageBody)
                 .setStyle(NotificationCompat.BigTextStyle().bigText(messageBody))
-                .setLargeIcon(bitmap)
+                .setLargeIcon(largeIcon)
                 .setContentIntent(contentPendingIntent)
                 .setPublicVersion(builderPublic.build())
                 .setPriority(NotificationCompat.PRIORITY_HIGH)