The author shares their experience of joining a small engineering team at incident.io as the seventh Product Engineer. They discuss the unique aspects of working in a start-up, such as pace, impact, and vibes. Pace refers to the high default rate of output and quick adaptation to changes. Impact is about having a significant stake in company decisions and constantly learning from diverse challenges. Vibes involve working with an enthusiastic team that shares a common mission. The author also provides advice on how to choose the right start-up, including attending casual meets, assembling questions, participating in culture interviews, and trusting one's gut feeling.