Butterfly Skin[1] was translated into English, German, French, Polish, Hungarian, Czech, Dutch, and other languages.

The publishers called it a Russian take on Silence of the Lambs, but critics pointed out that Kuznetsov "aims for more than smug nihilism.

Lisa Hayden, a recognized literary translator, wrote: ‘What I enjoy is reading about upheaval and how it affects and even connects characters that pop in and out of the chapters like pieces in a kaleidoscope".

Kuznetsov took part in forming post-Soviet independent journalism in Russia, focusing mainly on movies and literature.

The company had offices in Kyiv, Ukraine as well as Paris, France and in the United States; international clients include Nike, Audi, Nokia, Estée Lauder, Efes, Jeep, Bosch and other major corporations.

The company was shut down after Russia's massive invasion of Ukraine in 2022 In 2014, Kuznetsov and his wife Ekaterina founded Marabou Science Camp,[8] an educational project for Russian children in Europe.

In 2018, Sergey, together with Ekaterina, launched the international middle school Le Sallay Academy, based on a blended learning model of a combination of on-site sessions and online classes.

As the founder of Le Sallay Academy school and Camp Marabou, Sergey provides scholarships for free education and recreation for Ukrainian refugee children.