Level

Featherless AI

AI Researcher – Multilingual Data

Featherless AI is hiring an AI Researcher – Multilingual Data for a remote role. Level rates it ; you can apply on Featherless AI.

Level's read on this job

  • On Level's scale, this role is Builds AI ●●●●: the job is building AI systems.
  • This is listed as a remote role.
  • The posting mentions PyTorch, JAX and NLP among its tools and skills.
  • Featherless AI has 16 other open roles on Level.

AI in this role

pytorchjax
nlp

About the Role

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.

What You’ll Do

  • 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

What We’re Looking For

  • 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

Nice to Have

  • 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)

Why Join Us

  • 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

How we rate this

AI Researcher – Multilingual Data at Featherless AI rates 99 out of 100 for how much of the daily work is AI. That makes it Builds AI (AI Level 4 of 4). The level is about AI in the job, not seniority.

Classification

Builds AI. The job is building AI systems.

  1. ●●●● Builds AI80 to 100
  2. ●●●○ Works on AI60 to 79
  3. ●●○○ Uses AI40 to 59
  4. ●○○○ Little AI0 to 39

Levels come from how often the tools, models and workflows of the role are named in the posting itself. Read the description and count the AI tools, models and workflows it names.

Prepare for this job

Built from this posting and from similar jobs on Level.

Skills and AI tools this role asks for

NLPPyTorchJAX

Questions you could be asked

  1. What NLP problem have you worked on, and how did you measure whether it actually worked?
  2. Walk me through how you've used PyTorch in your day-to-day work.
  3. What are the limits of JAX that you've run into, and how did you work around them?
  4. How would you decide a model or AI system is ready to ship?
  5. Tell me about a time a model underperformed in production. How did you find out, and what did you change?

Adapt your resume

  • List these exact terms on your resume: NLP, PyTorch, and JAX. An applicant tracking system matches the wording, not the idea.
  • Attach one line of real, concrete experience to at least one of them. A tool named with nothing behind it rarely survives a human read.
  • Lead with what you built, trained or shipped. This role is judged on the AI system itself, not the tools around it.

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