Senior Model Engineer - AI Scaling & Large-Scale Data

SpaceXAI; Palo Alto (CA); On-site; USD 180,000 - 440,000; Full time

Benefits offered by this job

Equity

Medical coverage

Vision coverage

Dental coverage

401(k) retirement plan

Disability insurance

Life insurance

Job summary

SpaceXSI, building the Super Intelligence stack, seeks engineers to scale synthetic data, distill flagship models, and design robust mid-training evaluations. The role focuses on Python/C++-level production code, and large-model training across diverse modalities.

Join SpaceXSI in Palo Alto to advance RL, data processing frameworks, and scaling strategies for next-generation AI systems with strong compensation and equity.

Qualifications

• Experience writing production-quality code in Python, PyTorch, JAX, Rust, or C++.
• Experience training large models (1B+ parameters).
• Strong engineering abilities in large-scale data processing.

Responsibilities

• Scale synthetic coding data to trillions of tokens with large-scale docker verification.
• Distill the intelligence of flagship models into flash models through synthetic data generation.
• Optimize mid-training data mixtures to boost the ceiling for RL.
• Engineer long-context data recipes.
• Develop robust and diverse evaluation for mid-training checkpoints.

Skills

Python

PyTorch

JAX

Rust

C++

Large-model training

Tools

Spark

Ray

Job description

SpaceXSI, building the Super Intelligence stack, seeks engineers to scale synthetic data, distill flagship models, and design robust mid-training evaluations. The role focuses on Python/C++-level production code, and large-model training across diverse modalities.

Join SpaceXSI in Palo Alto to advance RL, data processing frameworks, and scaling strategies for next-generation AI systems with strong compensation and equity.