# Staff AI Scientist at Fiddler

- Company: Fiddler
- What the company does: The AI Control Plane for enterprises. Gain visibility, context, and control through evaluation, monitoring, enforcement, governance, and cost efficiency. Backed by Insight, Lightspeed and Lux.
- Company website: https://www.fiddler.ai/
- Type: Startups (AI role)
- Level: Senior
- Location: Palo Alto
- Work setup: Remote
- Pay: $220K to $260K base salary per year (USD)
- Posted: 2026-08-13
- Apply by: 2026-10-08
- Apply: https://jobs.ashbyhq.com/fiddler-ai/819f8925-b249-4b1a-b735-aec792624f68
- Page: https://www.1752.vc/careers/jobs/fiddler-staff-ai-scientist/

## About the role

Lead applied research and development. Lead applied research and development for the models and datasets at the core of Fiddler's Trust Service and suite of guardrail classifiers and evaluators that customers depend on to keep their LLM and agentic applications safe, accurate, and compliant in production.

## What they're looking for

- 7+ years of applied AI experience, with a strong track record of taking models from research to production
- Experience in LLM or Agentic Evals, Guardrailing
- Deep expertise training and fine-tuning classifier models, including modern encoder architectures (BERT-family, ModernBERT, etc.) and LLM-as-classifier approaches, clear understanding of the tradeoffs between them
- Hands-on experience with dataset development as a first-class engineering discipline: sourcing, labeling, synthetic generation, adversarial augmentation, and quality control
- Strong applied experience with LLMs and agentic systems – prompting, fine-tuning, and evaluation
- Proficiency in Python and the modern ML stack (PyTorch, Hugging Face, common training/serving frameworks)

Tags: Engineering Team