# Principal AI Engineer -Enfi at Unusual

- Company: Unusual
- What the company does: Unusual is a growth consultancy that helps companies win over a new audience: AI agents. Backed by Y Combinator.
- Company website: https://unusual.ai
- Type: Startups (AI role)
- Level: Principal and up
- Location: Boston, Massachusetts
- Work setup: On-site
- Posted: 2026-02-19
- Apply by: 2026-10-08
- Apply: https://jobs.lever.co/unusual/c4f26761-9812-4bff-8316-dca8906b26d9
- Page: https://www.1752.vc/careers/jobs/unusual-principal-ai-engineer-enfi/

## About the role

We’re looking for a Senior Principal AI Engineer to provide hands-on technical leadership across complex, production-grade AI systems. This role is for a builder-architect—someone who has repeatedly taken AI systems from idea to production, understands where they fail at scale, and knows how to unblock teams to move faster without sacrificing outcomes.

## What they're looking for

- 12+ years of software engineering experience, with deep hands-on experience building AI/ML systems in production
- Strong proficiency in TypeScript, React, Go, Python and modern AI frameworks
- Extensive experience with LLMs, including RAG, tool use, prompt systems, and agentic architectures
- Proven ability to design and ship large-scale AI systems that run reliably in real-world environments
- Strong architectural judgment across data systems, AI models, infrastructure, and application layers
- Deep understanding of AI failure modes: hallucination, drift, brittleness, latency, and cost blowups

Tags: EnFi