Member of Technical Staff - Research

The role

You will design and build the post-training stack to let customer models learn from production workflows. You will own end-to-end experiments across data, training, and evaluation.

What you will do

• Design and build the post-training stack
• Own end-to-end experiments across data, training, and evaluation
• Shape telemetry into learnable signals
• Train and serve custom LLMs and agents
• Design novel algorithms
• Make foundational technical and product decisions

Required qualifications

• Experience training or serving large language models
• Experience building RL environments or evaluation suites for LLMs
• Proficiency in PyTorch, JAX, or similar ML frameworks
• Strong experimental design skills
• Master’s / research experience

Nice to have

• Background in pre- or post-training RL for LLMs
• Experience with high-performance computing or large-scale clusters
• Contributions to open-source ML research or infrastructure
• Demonstrated technical creativity (research, OSS, side projects)
• PhD (last year of PhD), working on AI / RL open source projects

About the company

Trajectory is a research and product lab creating the platform for continual learning. It was founded by researchers from Deepmind, OpenAI, Meta, Apple, Amazon, and Scale.