Member of Technical Staff - Mid-Training Infra

Job description

Our Mission Reflection’s mission is to build open superintelligence and make it accessible to all . We’re developing open weight models for individuals, agents, enterprises, and even nation states. Our team of AI researchers and company builders come from DeepMind, OpenAI, Google Brain, Meta, Character.AI, Anthropic and beyond. About the Role: Design, build, and operate large-scale GPU infrastructure for high-throughput model inference and mid-training workloads. Develop systems that power synthetic data generation and reinforcement learning pipelines at scale. Build high-performance inference platforms capable of serving and evaluating models across thousands of GPUs. Optimize throughput, latency, and GPU utilization for large language model inference and rollout workloads. Build infrastructure that supports reinforcement learning pipelines, including large-scale rollout generation, evaluation, and policy improvement loops. Work closely with research teams to support distributed RL workloads and large-scale model evaluation infrastructure. Improve performance of model execution through kernel-level optimization, model parallelism strategies, and GPU runtime improvements. Develop d...