Amazon.com Inc. just landed a key hire from its biggest cloud rival. Steve Molloy, a chip industry veteran who spent the past seven years at Google, recently joined Amazon in a newly created position focused on AI chips. The move signals Amazon’s determination to close the gap with Google’s tensor processing units, or TPUs, as demand for custom silicon surges across the AI landscape. The Information broke the news first, highlighting how Amazon aims to tackle CEO Andy Jassy’s push for more efficient inference workloads. Molloy’s arrival comes at a pivotal moment. Amazon’s in-house silicon efforts, led by Trainium and Inferentia chips, now generate over $20 billion in annual run rate revenue, growing at triple-digit percentages year over year. Jassy revealed in his recent shareholder letter that if the chips business operated independently—selling to AWS customers and third parties alike—its run rate would hit $50 billion.…