Machine Learning Engineer — Multilingual Data at Featherless AI

Job description

We’re looking for a Machine Learning Engineer to own and scale our multilingual data pipeline—from sourcing and curation to evaluation and continuous improvement. You’ll work closely with researchers and infra engineers to ensure our models perform robustly across languages, scripts, and cultural contexts. This role sits at the intersection of data, research, and production ML and is ideal for someone who cares deeply about data quality, linguistic diversity, and model generalization beyond English. WHAT YOU’LL DO - Design, build, and maintain large-scale multilingual datasets across high- and low-resource languages - Develop data pipelines for collection, cleaning, normalization, deduplication, and labeling - Implement quality filters using statistical, heuristic, and model-based methods - Work with researchers to define language coverage, benchmarks, and evaluation metrics - Analyze dataset bias, coverage gaps, and failure modes across regions and scripts - Support training, fine-tuning, and distillation workflows with high-quality multilingual data - Continuously iterate on datasets based on model performance and real-world usage WHAT WE’RE LOOKING FOR - 3+ years of experience as an ML Engineer, Applied Scientist, or similar role - Strong experience working with multilingual or non-English datasets - Solid understanding of NLP fundamentals (tokenization, embeddings, language modeling) - Experience building scalable data pipelines (Python, Spark, Ray, or similar) - Familiarity with Unicode, scripts, tokenization challenges, and language-specific quirks - Comfort collaborating with researchers and translating research needs into production systems NICE TO HAVE - Experience with low-resource languages or multilingual benchmarks (e.g. FLORES, XTREME) - Exposure to LLM training, fine-tuning, or distillation - Linguistics background or experience working with native language experts - Contributions to open-source datasets or ML tooling - Experience with data quality evaluation at scale WHY JOIN - Real ownership over a core differentiator of the product - Work on models used globally, not just in English-speaking markets - Small, high-caliber team with deep ML and systems experience - Competitive compensation + meaningful equity at Series A stage

Requirements

Must-haves

This role sits at the intersection of data, research, and production ML and is ideal for someone who cares deeply about data quality, linguistic diversity, and model generalization beyond English.
Design, build, and maintain large-scale multilingual datasets across high- and low-resource languages
Develop data pipelines for collection, cleaning, normalization, deduplication, and labeling
Implement quality filters using statistical, heuristic, and model-based methods
Work with researchers to define language coverage, benchmarks, and evaluation metrics
Analyze dataset bias, coverage gaps, and failure modes across regions and scripts
Support training, fine-tuning, and distillation workflows with high-quality multilingual data
Continuously iterate on datasets based on model performance and real-world usage
3+ years of experience as an ML Engineer, Applied Scientist, or similar role
Strong experience working with multilingual or non-English datasets
Solid understanding of NLP fundamentals (tokenization, embeddings, language modeling)
Experience building scalable data pipelines (Python, Spark, Ray, or similar)
Familiarity with Unicode, scripts, tokenization challenges, and language-specific quirks
Comfort collaborating with researchers and translating research needs into production systems
Real ownership over a core differentiator of the product
Work on models used globally, not just in English-speaking markets
Small, high-caliber team with deep ML and systems experience
Competitive compensation + meaningful equity at Series A stage

Nice-to-haves

Experience with low-resource languages or multilingual benchmarks (e.g. FLORES, XTREME)
Exposure to LLM training, fine-tuning, or distillation
Linguistics background or experience working with native language experts
Contributions to open-source datasets or ML tooling
Experience with data quality evaluation at scale

Application prep

Use the role’s language and application details while tailoring your materials.

Keywords to mirror

machine learningmlpythonllm

Platform: ashby
Effort: quick