Member Of Technical Staff (AI)

TL;DR

Member of Technical Staff (AI): Design, build, and operate large-scale GPU infrastructure for high-throughput model inference and mid-training workloads with an accent on synthetic data generation and reinforcement learning pipelines at scale. Focus on improving performance of model execution through kernel-level optimization, model parallelism strategies, and GPU runtime improvements.

Location: San Francisco; London; New York

Company

Reflection’s mission is to build open superintelligence and make it accessible to all.

What you will do

• 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.
• Improve performance of model execution through kernel-level optimization, model parallelism strategies, and GPU runtime improvements.
• Diagnose and resolve performance bottlenecks across inference runtimes, GPU kernels, networking, and distributed compute systems.

Requirements

• Experience deploying and operating large-scale GPU systems for inference or model serving.
• Several years of hands-on experience building and running production infrastructure.
• Strong understanding of GPU performance characteristics and optimization techniques.
• Experience working with modern inference frameworks such as SGLang, Megatron, or similar high-performance LLM runtimes.
• Familiarity with distributed reinforcement learning infrastructure or rollout generation systems.

Culture & Benefits

• Top-tier compensation: Salary and equity structured to recognize and retain the best talent globally.
• Health & wellness: Comprehensive medical, dental, vision, life, and disability insurance.
• Life & family: Fully paid parental leave for all new parents, including adoptive and surrogate journeys.
• Benefits & balance: paid time off when you need it, relocation support, and more perks that optimize your time.
• Opportunities to connect with teammates: lunch and dinner are provided daily.