# Senior AI Research Engineer

Hiring organization: [Duolingo](https://career.thegoodapps.co/organizations/duolingo)

Canonical page: https://career.thegoodapps.co/jobs/d5816f8c-4c5f-4565-9989-ce7a3e389dac

Listed on Duolingo's own careers site. Applications go to them directly.

- Seniority: Senior
- Location: Pittsburgh, PA
- Salary: 197200 – 266800 USD per year

## Summary

Duolingo seeks a senior AI researcher to build machine learning systems for their video call learning product, working across the full ML stack from data preparation through deployment. This role suits experienced ML engineers comfortable with large language models, speech systems, and personalization techniques who want to mentor others while solving education-focused problems at scale.

_Our summary, not Duolingo's wording._

## Skills named

Feature Engineering, Fine-tuning, Neural Networks, Reinforcement Learning

## Required

- Proven experience as an AI research engineer in LLMs, multimodal modeling, speech, or related fields
- Strong background training and fine-tuning large models in production
- Advanced degree in Computer Science, Engineering, or related field with ML/AI focus, or equivalent experience
- Excellent leadership and communication skills
- Technical depth to guide architecture and implementation trade-offs
- Deep understanding of machine learning concepts, frameworks, and best practices

## Nice to have

- Experience across multiple levels of the ML stack including benchmarking and quality evaluations
- Broad experience in various AI/ML domains

Apply on Duolingo's site: https://careers.duolingo.com/jobs/8656931002?gh_jid=8656931002