diff --git a/app/controllers/slack_uploads_controller.rb b/app/controllers/slack_uploads_controller.rb
new file mode 100644
index 000000000..127e77649
--- /dev/null
+++ b/app/controllers/slack_uploads_controller.rb
@@ -0,0 +1,27 @@
+class SlackUploadsController < ApplicationController
+  include Rails.application.routes.url_helpers
+  before_action :set_blob, only: [:show]
+
+  def show
+    if @blob
+      redirect_to blob_url
+    else
+      redirect_to avatar_url
+    end
+  end
+
+  private
+
+  def set_blob
+    @blob = ActiveStorage::Blob.find_by(key: params[:blob_key])
+  end
+
+  def blob_url
+    url_for(@blob.representation(resize_to_fill: [250, nil]))
+  end
+
+  def avatar_url
+    base_url = ENV.fetch('FRONTEND_URL', nil)
+    "#{base_url}/integrations/slack/#{params[:sender_type]}.png"
+  end
+end
diff --git a/config/routes.rb b/config/routes.rb
index 424bfa630..75a300957 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -25,6 +25,7 @@ Rails.application.routes.draw do
     namespace :survey do
       resources :responses, only: [:show]
     end
+    resource :slack_uploads, only: [:show]
   end
 
   get '/api', to: 'api#index'
diff --git a/lib/integrations/slack/send_on_slack_service.rb b/lib/integrations/slack/send_on_slack_service.rb
index c0202c9a3..d4889bc4c 100644
--- a/lib/integrations/slack/send_on_slack_service.rb
+++ b/lib/integrations/slack/send_on_slack_service.rb
@@ -74,7 +74,13 @@ class Integrations::Slack::SendOnSlackService < Base::SendOnChannelService
 
   def avatar_url(sender)
     sender_type = sender.instance_of?(Contact) ? 'contact' : 'user'
-    "#{ENV.fetch('FRONTEND_URL', nil)}/integrations/slack/#{sender_type}.png"
+    blob_key = sender&.avatar&.attached? ? sender.avatar.blob.key : nil
+    generate_url(sender_type, blob_key)
+  end
+
+  def generate_url(sender_type, blob_key)
+    base_url = ENV.fetch('FRONTEND_URL', nil)
+    "#{base_url}/slack_uploads?blob_key=#{blob_key}&sender_type=#{sender_type}"
   end
 
   def send_message
diff --git a/spec/controllers/slack_uploads_controller_spec.rb b/spec/controllers/slack_uploads_controller_spec.rb
new file mode 100644
index 000000000..eef00ad1c
--- /dev/null
+++ b/spec/controllers/slack_uploads_controller_spec.rb
@@ -0,0 +1,44 @@
+require 'rails_helper'
+
+RSpec.describe SlackUploadsController do
+  describe 'GET #show' do
+    context 'when a valid blob key is provided' do
+      file = Rack::Test::UploadedFile.new('spec/assets/avatar.png', 'image/png')
+      blob = ActiveStorage::Blob.create_and_upload! io: file, filename: 'avatar.png'
+
+      it 'redirects to the blob service URL' do
+        get :show, params: { blob_key: blob.key }
+        redirect_path = response.location
+        expect(redirect_path).to match(%r{rails/active_storage/representations/redirect/.*/avatar.png})
+      end
+    end
+
+    context 'when an invalid blob key is provided' do
+      it 'returns contact default avatar url if the user is contact' do
+        get :show, params: { key: 'invalid_key', sender_type: 'contact' }
+        redirect_path = response.location
+        expect(redirect_path).to match(%r{integrations/slack/contact.png})
+      end
+
+      it 'returns agent default avatar url if the user is agent' do
+        get :show, params: { key: 'invalid_key', sender_type: 'user' }
+        redirect_path = response.location
+        expect(redirect_path).to match(%r{integrations/slack/user.png})
+      end
+    end
+
+    context 'when no blob key is provided' do
+      it 'returns contact default avatar url if the user is contact' do
+        get :show, params: { sender_type: 'contact' }
+        redirect_path = response.location
+        expect(redirect_path).to match(%r{integrations/slack/contact.png})
+      end
+
+      it 'returns agent default avatar url if the user is agent' do
+        get :show, params: { sender_type: 'user' }
+        redirect_path = response.location
+        expect(redirect_path).to match(%r{integrations/slack/user.png})
+      end
+    end
+  end
+end