Carl Pei, the Swedish tech entrepreneur, is working on a stealth project that he plans to unveil this month. : Serial entrepreneur Kunal Shah is backing the new venture of Carl Pei, the Swedish tech entrepreneur and co-founder of smartphone company OnePlus. Pei has received seed investment from Shah, who has added the London based venture into his portfolio. Pei is working on a stealth project that he plans to unveil this month. “Kunal (Shah) is one of the sharpest people I know.