With my extensive experience in various technologies, I can confidently say that your Django credit note project is right up my alley. Not only am I versed in Django and Python but have broad experience integrating financial APIs, including credit card payment systems. This will be instrumental in developing the functionalities you require for generating, tracking, and distributing credit notes, with an efficient date selector, calculator, and accurate old price utilization.
In addition, my proficiency in utilizing PDF libraries compatible with Django and email integration for secure document sending aligns well with your project's need for seamless document management. Creating secure links to enable smooth downloads from a website is also a skill that I've successfully implemented in my previous projects.
Furthermore, my skill set includes designing user-friendly interfaces which would ensure effective tracking and utilization of credit notes. With strict adherence to security and reliability standards, I am confident in delivering a robust implementation that will streamline your financial operations while enhancing customer experience. Time is of the essence for you, and I am ready to deliver within your desired timeframe of today or early tomorrow morning at the latest. Let's get this critical project completed together to safeguard your business's financial future.