Research Engineer, Language Model Pre-Training
Zyphra
Posted: August 28, 2025
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Quick Summary
As a Research Engineer, Language Model Pre-training, you'll shape our language model roadmap through end-to-end pretraining development.
Required Skills
Job Description
Zyphra is an artificial intelligence company based in San Francisco, California.
The Role:
As a Research Engineer, Language Model Pre-training, you'll shape our language model roadmap through end-to-end pretraining development. You will work extremely closely with our pretraining team, who will integrate your insights into our next-generation models.
You'll work across:
• Large-scale training runs and model parallelization
• Performance optimization of our pretraining stack
• Dataset collection, processing, and evaluation
• Architecture and methodology research, including optimizer ablations
Requirements:
• Strong engineering aptitude for rapidly implementing reliable and robust systems
• Can rapidly learn new fields and are excited to implement new ideas
• Excellent communication and collaboration skills, and can work effectively on both research and engineering implementation at scale
Ideal Skillset:
• Deep expertise and intuition for solving machine learning problems and training models
• Experience with training on large-scale (multi-node) GPU clusters
• Deep understanding of model training pipelines – including model/data parallelism, distributed optimizers, etc.
• Strong grasp of proper experimental methodology for running rigorous ablations and other hypothesis testing
• Understanding of large-scale, highly parallel data processing pipelines
• High proficiency with PyTorch and Python.
• Strong ability to dive into large pre-existing codebases and rapidly get up to speed
• Published machine learning research in well-respected venues is a plus
• Postgraduate degree in a scientific subject (Computer Science, EE/EECS, Math, Physics)
Why Work at Zyphra:
• Our research methodology is to make grounded, methodical steps toward ambitious goals. Both deep research and engineering excellence are equally valued
• We strongly value new and crazy ideas and are very willing to bet big on new ideas
• We move as quickly as we can; we aim to minimize the bar to impact as low as possible
• We all enjoy what we do and love discussing AI
Benefits and Perks:
• Comprehensive medical, dental, vision, and FSA plans
• Competitive compensation and 401(k)
• Relocation and immigration support on a case-by-case basis
• On-site meals prepared by a dedicated culinary team; Thursday Happy Hours
• In-person team in San Francisco, CA, with a collaborative, high-energy environment
We’re building something new, and we want someone with strong research taste and intuition. If that is you, Apply Today!