I understand the important workflow you need for your invoicing system and how crucial it is for your business. With my 6 years of full stack development experience, specifically using core PHP, MySQL and JavaScript, I am confident that I can create a robust and efficient solution for your needs.
Having handled complex projects in the past, with over 20 such successful accomplishments to my name, I have become adept at navigating intricate database structures and optimizing code. This means I can effectively leverage the data stored in your customer table to find the next invoice date based on the provided day.
Moreover, my proficiency in PHP frameworks like Symfony and Laravel along with front-end technologies like Vue JS, CSS, HTML, etc., will ensure that your system not only functions accurately but also looks visually appealing and provides an ideal user experience. Let's bring automation and efficiency to your invoicing process together!