A bot developer designs, builds, and optimizes chatbots or virtual assistants. They work on understanding user requirements, developing the bot's logic, and implementing machine learning algorithms to improve the bot's learning process. They often use programming languages like Python or JavaScript and platforms like Microsoft Bot Framework or Dialogflow. They also integrate the bot with different channels like websites, apps, or social media. Furthermore, they monitor the bot's performance, analyze user interactions, and make necessary updates or enhancements to improve user experience. They must also ensure the bot complies with data privacy and security regulations.