Arnaud Weber served as Block's Engineering Lead from November 2025, having previously served as Cash App Engineering Lead from June 2025 to November 2025. He departed the company on June 5, 2026, after which the engineering organization began reporting directly to Block Head Jack Dorsey.
From February 2023 to May 2025, Mr. Weber served as the Founder, Chief Technology Officer and Engineering Lead of Big Sur AI. Beginning in November 2019, he served in various positions at Twitter, Inc., including as Engineering Lead - Consumer Product from February 2022 to November 2022 and Engineering Lead - Revenue Product from November 2019 to February 2022.
Mr. Weber holds a degree in Engineering, Operating System and Network from EPITA: Ecole d'Ingenieurs en Informatique.