Dogfooding generally consists in using your own product, to make sure you feel the user’s pain points.
Anthropic is probably doing it unwantingly, as their job postings inbox is so full of AI-written applications that they had to introduce the following policy:
While we encourage people to use AI systems during their role to help them work faster and more effectively, please do not use AI assistants during the application process. We want to understand your personal interest in Anthropic without mediation through an AI system, and we also want to evaluate your non-AI-assisted communication skills. Please indicate ‘Yes’ if you have read and agree.