Solid python programming foundation – not necessarily a lengthy resume, but something solid to build upon, and a hungry attitude for more junior candidates.
AWS services, especially serverless (lambda, API gateway, eventbridge, secrets manager, RDS, SNS). Again, not critical for a more junior but hungry resource, as long as they have basic system admin experience. If they used GCP or Azure, that could work too, since a lot of it translates from one platform to the other.
Sense of ownership, self-starter attitude, ability and willingness to learn quickly.