Simple jobs queue implementation on Ruby

my_jobs.rb

module MyJobs
    def self.backend
      @backend
    end
    
    def self.backend=(backend)
      @backend = backend
    end

  class Processor
    def self.start(concurrency = 1)
      concurrency.times { |n| new("Processor #{n}") }
    end

    def initialize(name)
      thread = Thread.new do
        loop do
          payload = MyJobs.backend.pop
          worker_class = payload[:worker]
          worker_class.new.perform(*payload[:args])
        end
      end

      thread.name = name
    end
  end

  module Worker
    module ClassMethods
      def perform_async(*args)
        MyJobs.backend.push(worker: self, args: args)
      end
    end
  end
end

MyJobs.backend = Queue.new
MyJobs::Processor.start(5)