Hannu Rajaniemi is an author, mathematical physicist, and science innovator from Finland. He has a PhD in String Theory. For more than a decade he lived in Edinburgh and currently resides in California. He holds several advanced degrees in mathematics and physics. Multilingual from an early age, he writes his science fiction in English.

Hannu Rajaniemi was born in Finland, obtained his PhD in string theory at the University of Edinburgh and now works as a co-founder and CTO of HelixNano, a synthetic biology startup based in the Bay Area. He is the author of four novels including The Quantum Thief trilogy and the forthcoming Summerland, and several short stories.