Member of Technical Staff - Pre-Training Infra is open at Reflectionai in San Francisco, CA. The posting gives no salary; similar roles in the United States advertise a median of $194K. Posted on Mar 24, 2026, and still on Reflectionai’s careers page when we last checked, on Nov 14, 2026.
About the role
Build and scale distributed training systems that power frontier model pre-training. - Work closely with research teams to design and operate large-scale training runs for foundation models. - Develop infrastructure that enables efficient training across thousands of GPUs using modern distributed training frameworks. - Optimize training throughput, stability, and efficiency for large model training workloads. -…
The opening lines of the posting. The rest is on Reflectionai’s careers page.
Hiring at Reflectionai
Reflectionai has 45 open roles right now. Most are in Engineering, Data & Research and Security. See all its roles
