Senior AI Research Scientist — Architecting Efficient Models

Nebius; United States; Remote; USD 150,000 - 280,000; Full time

Benefits offered by this job

Competitive compensation

Career growth

Flexibility and ownership

Collaborative culture

Impactful AI projects

International environment

Job summary

Nebius is building a full-stack AI cloud platform and pursuing frontier model architectures to enable real-world AI at scale.

As a Senior Research Scientist, you will formulate original research questions, design architectural changes, and publish open-source methods while mentoring others and collaborating with engineering teams.

Focus areas include long-context modeling, memory systems, sparse or linear attention, and efficient inference to reduce training and deployment costs.

Qualifications

• A PhD or equivalent research experience in machine learning.
• Deep knowledge of transformers, attention, language-model training, and modern model architectures.
• A strong publication record or comparable evidence of original research.
• Experience designing rigorous experiments and drawing clear conclusions from ambiguous results.
• Strong implementation skills in Python and a modern deep-learning framework.
• Experience training or evaluating models at scale.
• Clear technical communication and the ability to lead research independently.
• Experience with long-context modeling, memory systems, sparse or linear attention, model distillation, distributed training, or efficient inference is particularly relevant.

Responsibilities

• Formulate original research questions and translate them into rigorous experimental programs
• Design and evaluate architectural changes at meaningful model scales
• Develop methods that preserve model quality while reducing training or inference cost
• Collaborate with engineering teams to validate ideas in efficient implementations
• Publish research and contribute to open-source models, methods, and tools
• Mentor researchers and help shape the stream's research direction

Skills

Transformers

Attention mechanisms

Python

Model training at scale

Education

PhD in ML

Tools

Deep learning framework

Job description

Nebius is building a full-stack AI cloud platform and pursuing frontier model architectures to enable real-world AI at scale.

As a Senior Research Scientist, you will formulate original research questions, design architectural changes, and publish open-source methods while mentoring others and collaborating with engineering teams.

Focus areas include long-context modeling, memory systems, sparse or linear attention, and efficient inference to reduce training and deployment costs.