class SyncWorker
    include Sidekiq::Worker
    sidekiq_options queue: :foo

    def perform(group_id)
      group = :Group.find(group_id)
      # ... business logic
    end
  end


Group
  .where("last_sync_at < ?", 1.day.ago)
  .find_each { |group| SyncWorker.perform_in(rand(1..120).minutes, group.id) }