AI Researcher – Multilingual Data at Featherless AI (World)AI Researcher – Multilingual Data

We’re looking for an AI Researcher focused on multilingual data to help us build and scale next-generation language models across diverse languages and domains. You’ll own research and execution around data sourcing, curation, evaluation, and training strategies for multilingual and low-resource languages, with a strong emphasis on publishing high-quality research and translating it into production systems.

This role is ideal for someone who enjoys working close to the frontier: balancing papers, prototypes, and real-world impact in a fast-moving startup environment.

• Design and execute research on multilingual datasets, including data collection, filtering, deduplication, and quality measurement
• Develop strategies for low-resource and long-tail languages (sampling, augmentation, curriculum design)
• Research and improve cross-lingual transfer, alignment, and robustness in large language models
• Build and maintain evaluation benchmarks for multilingual performance
• Collaborate with engineers and researchers on training pipelines and model architecture decisions
• Publish research at top venues (e.g., ACL, EMNLP, NeurIPS, ICML, ICLR) and contribute to open-source when appropriate
• Translate research insights into practical improvements in production models

• Strong background in NLP / ML research, with a focus on multilingual or cross-lingual modeling
• Publication record at respected conferences or journals (ACL, EMNLP, NeurIPS, ICML, ICLR, etc.)
• Experience working with large-scale text datasets across multiple languages
• Solid understanding of:
• Tokenization and vocabulary design for multilingual models
• Data quality metrics, filtering, and dataset bias
• Transfer learning and multilingual representation learning
• Comfortable prototyping in Python with modern ML frameworks (PyTorch, JAX, etc.)
• Ability to operate independently and ship research in a startup pace environment

• Experience with low-resource languages or non-Latin scripts
• Open-source contributions in NLP or data tooling
• Experience training or evaluating large language models
• Familiarity with multilingual benchmarks (e.g., XTREME, FLORES, TyDi QA)

• Real ownership over research direction and impact
• A team that values papers and production
• Access to meaningful scale: large datasets, modern infrastructure, and fast iteration
• Competitive compensation and meaningful equity at an early stage