Lead design and delivery of agentic AI-powered full-stack features. Ship production-ready systems using React, Next.js, TypeScript, and PostgreSQL. Architect scalable solutions, prototype and evaluate agentic features, perform rigorous code review (including AI-generated code), and collaborate with product and engineering teams to iterate rapidly across multiple concurrent projects.
About the Role
We're building the next generation of email marketing tools at Validity. AI is central to how we build – we develop with agents daily – and to what we build, shipping AI-powered features that help our customers succeed.
We're looking for a Principal Full Stack AI Engineer who ships fast, designs systems that last, and holds a high-quality bar across a team that builds with AI every day.
Team Dynamic
We move fast, communicate directly, and debate ideas openly. The best idea wins regardless of who it comes from. We bias toward action – ship, learn, iterate.
Position Duties and Responsibilities
Base salary range $200,000 - $220,000, plus benefits, bonus opportunities and stock options. Final salary may vary depending on skills, location, and/or experience.
#LI-Hybrid
We're building the next generation of email marketing tools at Validity. AI is central to how we build – we develop with agents daily – and to what we build, shipping AI-powered features that help our customers succeed.
We're looking for a Principal Full Stack AI Engineer who ships fast, designs systems that last, and holds a high-quality bar across a team that builds with AI every day.
Team Dynamic
We move fast, communicate directly, and debate ideas openly. The best idea wins regardless of who it comes from. We bias toward action – ship, learn, iterate.
Position Duties and Responsibilities
- Quickly build and ship full-stack features
- Design and deploy agentic AI systems that solve real user problems
- Work across multiple projects simultaneously, using agents to maintain velocity and context across concurrent workstreams
- Perform rigorous code review – especially of AI-generated code – ensuring production-grade quality, security, and systems design
- Set technical direction through architecture decisions, prototypes, and rapid experimentation
- Help define and improve evaluation for agent-powered features
- Move from idea to production-ready implementation at speed
- Work closely with product managers, shipping, learning, and iterating
- 10+ years of engineering experience shipping impactful products
- Deep full-stack experience with React, Next.js, TypeScript, and PostgreSQL
- 2+ years building agentic AI systems
- Demonstrated ability to work across multiple projects simultaneously, leveraging agents to multiply output
- Strong code review skills with the judgment to maintain high quality in an AI-assisted development environment
- Strong product sense – you understand the product and what users want
- Excellent systems design – you architect for clarity, maintainability, and scale
- Bias toward action and rapid decision-making
- A doer – hands-on with code and experiments daily
- A quality gate – you care about getting it right, and you know AI-generated code needs sharp review
- Fast and intelligent – you learn fast, make smart decisions quickly, and iterate
- An AI-native builder – agentic tools are part of how you work, not an afterthought
- Experimentation-obsessed – you validate through building
- Comfortable with ambiguity – you forge ahead when the path isn't clear
- Collaborative – you thrive on code review and learning from others
- Hard-working and motivated – you put in the effort and take pride in what you ship
- History of 0-to-1 projects
Base salary range $200,000 - $220,000, plus benefits, bonus opportunities and stock options. Final salary may vary depending on skills, location, and/or experience.
#LI-Hybrid
Validity Inc. Boston, Massachusetts, USA Office
100 Summer St, Suite 2900, Boston, Massachusetts, United States, 02110 2106
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