Twilio Developer Evangelist Lizzie Siegle and Plushcap collaborated to create a low-code application for the Twilio SIGNAL conference using Typeform, Twilio SMS, SendGrid, Glitch, and Courier. The application allowed visitors to RSVP, which triggered an email and optional SMS notification via Typeform webhooks. A Node.js and Express.js Glitch application handled incoming webhooks from Typeform and Twilio, while Courier was used to send the email and SMS response based on a token provided by Twilio. The project showcased how to connect these services to handle notifications using low-code tools.