Technically, I built the conversation flow using PHP to handle user interactions and logic. To handle image processing, storage, and messaging, I integrated several AWS services. For example, AWS Rekognition was used to analyze the selfies, and AWS S3 stored the images securely. The IMGix API was leveraged to generate and customize the color swatch images dynamically. For message delivery and bot-user communication on WhatsApp, I used Infobip’s messaging platform, ensuring timely and reliable exchanges.