Member of Technical Staff - Pre-Training
Reflection AI · San Francisco, CA · London · New York, NY
CHECKED 18H AGO
Frontier labonsite
At a glance
Highlights
- Research scaling laws and data efficiency for large language models.
- Build open models that let anyone control and customize intelligence.
- Optimize training infrastructure for efficient large-scale scaling.
What they offer
- Top-tier salary and equity structured to recognize talent globally
- Stock options for all contributors
- Comprehensive medical, dental, vision, life plus wellness allowance
- Lunch and dinner provided in the office daily
- 22 weeks paid parental leave for all new parents
- Unlimited PTO in the U.S. and 30 days in the U.K.
- Visa sponsorship and long-term immigration support
- Regular off-sites, happy hours, and team celebrations
Ideal candidate
Research-driven builder with graduate background who thrives in fast-paced startups, balancing scientific curiosity with pragmatic engineering to advance open frontier intelligence.
Requirements
- Graduate degree (MS or PhD) in Computer Science, Machine Learning, or related discipline.
- Solid software engineering capabilities with experience building large-scale systems.
- Experience with large-scale ETL workflows and training data preparation.
- Deep understanding of large-scale ML, especially as it relates to language models, distributed training, and scaling.
- Proficient in Python and deep learning frameworks (PyTorch preferred).
- Navigate trade-offs between research objectives and practical engineering realities.
- Thrive in a fast-paced, high-agency startup environment with bias toward action.
- Strong communication capabilities and comfort working collaboratively.
- Passionate about advancing the frontier of intelligence.
- visa sponsorship
- We sponsor visas to help exceptional talent join our team and support long-term immigration pathways where applicable.
Lab profile
About Reflection AI
Research lab making intelligence open and accessible for everyone to use, customize, and build on.
What they build
- Open foundation models
- Aligned general agents
- Enterprise AI deployments
Known for
- Frontier model pre-training
- Post-training and alignment
- Distributed training infrastructure
- Secure cloud platform foundations