# Principal Applied Scientist

**Company**: Microsoft
**Location**: Mountain View
**Work arrangement**: hybrid
**Experience**: senior
**Job type**: full-time
**Salary**: USD $142,800 – $274,800 per year
**Category**: Engineering
**Industry**: Technology
**Ticker**: MSFT
**Wikidata**: https://www.wikidata.org/wiki/Q2283

**Apply**: https://microsoft.ai/job/principal-applied-scientist-6/?utm_source=yubhub.co&utm_medium=jobs_feed&utm_campaign=apply
**Canonical**: https://yubhub.co/jobs/job_4028c7d0-1d5

## Description

Copilot Discover, part of Microsoft AI, helps surface relevant content across Microsoft surfaces. We're seeking a Principal Applied Scientist to lead the science behind Discover's ranking and content-quality stack.

As a Principal Applied Scientist, you'll combine LLMs, multimodal models, and large-scale recommender systems to drive engagement, satisfaction, and trust. You'll set technical direction, mentor a high-caliber science cohort, and partner with engineering, PM, UXR, and policy to ship end-to-end outcomes.

**Responsibilities**

- Lead content-quality understanding at scale, designing and deploying models to assess credibility, usefulness, freshness, safety, and diversity.

- Advance the recommendation and ranking stack, architecting and productionizing large-scale DNN/LLM-enhanced recommenders.

- Own evaluation and experimentation, defining offline metrics and online methodologies.

- Champion safety and trust, partnering with policy and platform teams to encode safety standards.

- Scale E2E ML systems, collaborating with engineering on data contracts and distributed training.

- Mentor and influence, providing technical leadership and upleveling peers.

- Stay close to users, translating user engagements into model objectives and product bets.

**Qualifications**

- Bachelor's, Master's, or Doctorate in Statistics, Econometrics, Computer Science, or related field with relevant experience.

- Required experience: 6+ years with Bachelor's, 4+ years with Master's, or 3+ years with Doctorate.

- Preferred qualifications include publications at top AI/ML conferences, expertise with LLMs and multimodal modeling, and experience with Microsoft stack.

The typical base pay range for this role across the U.S. is USD $142,800 – $274,800 per year.

## Skills

### Required
- LLMs
- multimodal models
- large-scale recommender systems
- Python
- deep learning frameworks

### Nice to have
- publications at top AI/ML conferences
- expertise with LLMs and multimodal modeling
- Microsoft stack

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Source: [Apply at microsoft.ai](https://microsoft.ai/job/principal-applied-scientist-6/?utm_source=yubhub.co&utm_medium=jobs_feed&utm_campaign=apply)