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Research Engineer - Language Model Pre-Training

Zyphra · San Francisco Bay Area

📍 San Franciscovia ashbyPosted 2026-03-17
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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 WHAT WE'RE LOOKING FOR / 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 QUALIFICATIONS / ADDITIONAL SKILLS: - 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) plan - Relocation and immigration support on a case-by-case basis - In-office snacks and meals provided - Unlimited PTO and company holidays - In-person team in San Francisco with a collaborative, high-energy environment

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