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Intelix.ai

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Senior Research Engineer, Model Training / Pretraining

Intelix.AI

Seattle, WA • On-site

$147K - $220K/yr

Other

Posted 5 days ago

Job description

Senior Research Engineer

Seattle, Washington | Hybrid


The position is a Senior Research Engineer on the model scaling team, reporting to a Director of AI Research. The work covers model training and the supporting infrastructure. Training runs use approximately 600 B300 and 1,000 H100 GPUs.



Responsibilities


  • Build and maintain the training stack for distributed model training across GPU clusters.
  • Run scaling experiments covering model architecture, data, and optimisation.
  • Work in one specialist area: GPU kernel development (CUDA), Mixture-of-Experts architectures, or reinforcement-learning post-training (GRPO, PPO, RLVR).
  • Release models, code, and associated research publicly.


Requirements


  • 6+ years of software engineering experience.
  • 4+ years of machine-learning infrastructure experience.
  • Python and PyTorch.
  • Experience training models from scratch (pretraining). Experience limited to retrieval-augmented generation or application-level fine-tuning does not meet this requirement.
  • Depth in at least one of: CUDA kernels, Mixture-of-Experts, or reinforcement learning (GRPO, PPO, RLVR).


Also considered

  • JAX.
  • Open-source contributions.
  • Published research.
  • Experience with GPU clusters at the scale described above.


Interview process


  1. Hiring-manager screen — 25 minutes.
  2. Recruiter screen — 15 minutes.
  3. Machine-learning coding interviews — two sessions, 45 minutes each.
  4. Machine-learning system-design interview — 45 minutes.
  5. Technical deep-dive with the Director of AI Research — 60 minutes.
  6. Final interview — 30 minutes.
  7. Offer.


  • Base salary: $147,000–$220,000 + strong bonus programmes in addition to base salary.
  • Hybrid in Seattle, Washington. On-site presence is required. Fully remote is not available.
  • Visa sponsorship is available.


Application


This search is managed by Intelix.AI.

Contact: Hasan Mohammad — hasan@intelix.ai.

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