he Filter Koffee podcast is not an interview. It is a window into the minds of the most interesting people that the host has met. A peek into their craft, passions, and convictions. Mostly, it is a conversation. The kind that leaves you richer. The kind that only coffee can bring out. Karthik Nagarajan likes his coffee strong, just like his conversations. This cryptographer turned the researcher turned screenwriter turned marketer, sits down with creators, activists, business leaders, and the occasional neighbor for an unstructured chat. The only thing filtered on this podcast is the coffee.