Member of Technical Staff - Pre-Training
Reflection11 months ago
London, United Kingdom +2 moreMid Level / Senior
H1B Sponsor
Responsibilities
- Research and build solutions across algorithms, scaling laws, and model architecture.
- Design and run scientific experiments to advance understanding of large language models.
- Implement state-of-the-art methods from deep learning literature.
- Lead small research projects independently while collaborating on larger initiatives.
- Optimize training infrastructure for efficient scaling.
- Contribute across the entire stack from low-level optimizations to high-level model design.
Requirements
- Graduate degree (MS or PhD) in Computer Science, Machine Learning, or related discipline.
- Solid software engineering capabilities with experience in large-scale systems.
- Experience with large-scale ETL workflows and training data preparation.
- Deep understanding of large-scale ML, especially related to language models and distributed training.
- Proficient in Python and deep learning frameworks, preferably PyTorch.
- Ability to navigate trade-offs between research objectives and practical engineering realities.
- Strong communication skills and comfort working collaboratively.
- Passionate about advancing the frontier of intelligence.
Benefits
- Top-tier compensation including salary and equity.
- Comprehensive medical, dental, vision, life, and disability insurance.
- Fully paid parental leave for all new parents, including adoptive and surrogate journeys.
- Financial support for family planning.
- Paid time off and relocation support.
- Daily lunch and dinner provided, along with regular off-sites and team celebrations.
Categories
About Reflection
Reflection is a research lab making intelligence open and accessible for everyone to use, customize, and build on. Our team previously built frontier LLMs at labs like DeepMind, OpenAI, and Anthropic. We believe AI should be built in the open, with transparent research and collaborative development. That means giving enterprises, governments, and sovereign entities true ownership and control of AI that performs at the highest level. Our mission: make intelligence open and accessible to all.