What could that possibly be for?
They cannot verify them directly because they cannot publish their algorithms and data. So let them do science and figure out who knows his algorithms.
*edit: actually:
>Optimize and speed up classical molecular dynamics and quantum chemistry algorithms with artificial intelligence and high-throughput computational methods.
They are building an algorithm library
Physics may have nothing to do with financial markets but the math tools and research skills physicists have are useful in finance.
The same goes for Computational chemistry and analysing of data for a video streaming site
It could be for helping them moderate vaccine or climate misinformation, e.g., https://www.tiktok.com/safety/en/covid-19/
It could be part of establishing or expanding their research division mainly devoted to getting smart people inside the company, having publications and patents in their portfolio, or inventing algorithms that scale better with big data. There are open quantum computing and scientific computing jobs too.