The Principal AI Engineer will develop and deploy AI systems, conduct research, set technical directions, and create performance evaluation tools.
About the Role
We are looking for a Principal AI Engineer who moves fast, experiments relentlessly, and ships agentic AI systems that solve real problems.
This is a hybrid, office-based position which requires you to work 3 days per week (Tuesdays, Wednesdays and Thursdays) in our Boston, MA (Financial District) Headquarters.
Team Dynamic
Who you are:
Required Experience, Skills, and Education
We are looking for a Principal AI Engineer who moves fast, experiments relentlessly, and ships agentic AI systems that solve real problems.
This is a hybrid, office-based position which requires you to work 3 days per week (Tuesdays, Wednesdays and Thursdays) in our Boston, MA (Financial District) Headquarters.
Team Dynamic
Who you are:
- A doer: you're hands-on with code and you experiment daily
- Fast and intelligent: you make smart decisions quickly and iterate
- Experimentation-obsessed: you validate through building
- Comfortable with ambiguity: you forge ahead when the path isn't clear
- Build and deploy agentic AI systems
- Perform research spikes to evaluate scope and feasibility
- Help set technical direction through working prototypes and rapid experimentation
- Create evaluation datasets, labeling workflows, and instrumentation to improve agent performance
- Move from idea to production-ready implementation at speed
Required Experience, Skills, and Education
- 10+ years of engineering experience shipping impactful products
- 2+ years building agentic AI systems
- Strong product sense and you have an understanding on how to integrate agents into user experiences
- Experience with agentic frameworks. We use Mastra AI, so either experience with or a willingness to learn Typescript
- Bias toward action and rapid decision-making
- Ability to work 3 days per week (Tuesdays, Wednesdays and Thursdays) to work on-site in Boston, MA.
- ML engineering or data science background
- Experience with evaluation frameworks, observability tools, or synthetic data generation
- History of 0-to-1 projects
Top Skills
AI
Mastra Ai
Typescript
Validity Inc. Boston, Massachusetts, USA Office
100 Summer St, Suite 2900, Boston, MA, United States, 02110
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