Jens Groth is Chief Scientist at Nexus. His research on zero-knowledge proofs includes the invention of pairing-based SNARKs and co-inventions of pairing-friendly proof systems, logarithmic size proofs in cyclic groups, prover-efficient proofs with constant overhead, and usage of lookups in proving correct machine execution, recognized by IACR test-of-time awards in 2021 and 2023. He has been Professor at UCL and Director of Research at DFINITY.