Recently in one of our project there was a requirement to send SMS notification to users and task was to perform this functionality as background job using delayed job service. I wrote following code for sending SMS notifications to user and it was working fine. Then I just did one liner change in my code to process send_sms method asynchronously using handle_asynchronously method of delayed job and thought it will work as expected. attr_reader :client, :sender, :recepient, :message def initialize(recipient_ph_number, message_details) @client = Twilio::REST::Client.new ACCOUNT_SID, AUTH_TOKEN @sender = TWILIO_PHONE_