# Applied AI Engineer at Twenty

- Company: Twenty
- What the company does: The #1 Open Source CRM for modern teams. Modular, scalable, and built to fit your business. Backed by Y Combinator.
- Company website: https://twenty.com
- Type: Startups (AI role)
- Level: Mid level
- Location: Arlington, VA
- Work setup: On-site
- Pay: $159K to $263K base salary per year (USD)
- Posted: 2025-09-04
- Apply by: 2026-10-08
- Apply: https://jobs.ashbyhq.com/twenty/490ea911-5a82-449a-89ed-c40f2beff9d5
- Page: https://www.1752.vc/careers/jobs/twenty-applied-ai-engineer/

## About the role

Create, clean, and maintain high-quality training and evaluation datasets for specialized AI use cases. Fine-tune language models (small specialized through medium foundation models) for mission needs.

## What they're looking for

- You’re motivated by real-world outcomes and want your work to directly impact national security missions
- You care about rigor: clean data, measurable evaluation, and repeatable experiments beat demos
- You balance research curiosity with product instincts—you ship, observe, iterate, and harden
- You’re comfortable working across cloud and on-premises constraints and adapting to the environment
- You communicate clearly with engineers and non-ML partners, and you write documentation people use
- You think in systems: models, retrieval, infrastructure, and feedback loops all have to work together

Tags: Engineering