The founder of ReadMe, a documentation startup, turned their frustration with poor API documentation into a successful business venture. Initially working as a developer, they encountered inadequate documentation across various projects, which inspired the creation of a company aimed at simplifying this often overlooked yet critical task. Despite initial setbacks, including a rejection from Y Combinator due to an underdeveloped concept, the founder persisted. The market eventually evolved with the rise of API-first companies, highlighting the importance of clear documentation, which provided the perfect backdrop for the launch of ReadMe. The platform offered tools like custom domains, pre-built layouts, an API explorer, and a key generator to streamline the documentation process for developers. With improved technical skills and a deeper understanding of the market, the founder successfully launched ReadMe, gained traction through platforms like ProductHunt and Hacker News, and eventually gained acceptance into Y Combinator with a solid product and customer base.