The author of the article is Jimmy Baker, a developer at TapeOnline.com, who has successfully integrated Twilio's API into his company's phone-in order manager. He was introduced to Twilio by a friend and found it easy to customize for his business needs. The integration allowed customers to check their order status over the phone, place new orders, or get in touch with customer service representatives. Jimmy also utilized Twilio's recording and transcription services to enable over-the-phone ordering, which greatly improved the customer experience. He built the application using Ruby on Rails, leveraging a ruby gem called "twilio" and Shopify's active_shipping plugin for tracking information. The entire integration process took around 3 hours to complete, and Jimmy plans to add features such as product information and repeat last order functionality in the future.