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# Senior Principal AI Scientist - Foundation Models & Generative AI

- **Company:** RECRUITR LABS INC.
- **Location:** United States (Remote available)
- **Experience:** Expert
- **Salary:** $185,000.0 - $280,000.0
- **Contract:** Permanent contract
- **Skills:** Artificial Intelligence, Computer Clusters, Software Debugging, Distributed Computing Environment, Large Language Models, Deep Learning, Generative AI, Optimization Algorithms
- **Published:** July 29, 2026
- **Apply:** https://www.indeed.com/viewjob?jk=c0c8e0d0811c0a08

## About the Role

* Extensive experience building and training large-scale transformer models from scratch.
 * Deep expertise in modern deep learning, optimization theory, and representation learning.
 * Strong understanding of transformer internals, including attention mechanisms, RoPE, ALiBi, GQA, and Mixture-of-Experts (MoE).
 * Experience with distributed training frameworks including FSDP, ZeRO, tensor parallelism, and pipeline parallelism.
 * Hands-on knowledge of mixed precision training (BF16, FP8), gradient checkpointing, and large-scale GPU clusters.
 * Expertise with optimization algorithms including AdamW, Lion, Adafactor, learning-rate scheduling, and debugging training instability.
 * Strong understanding of scaling laws, compute vs. data tradeoffs, and efficient model scaling.
 * Experience with modern alignment techniques such as RLHF, DPO, or GRPO is highly desirable.



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