Principal Full Stack AI Engineer

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., * 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, For over 20 years, tens of thousands of organizations across the world have relied on Validity solutions to target, contact, engage, and retain customers - using trustworthy data as a key advantage. Validity's flagship products - Everest, DemandTools, BriteVerify, and GridBuddy Connect - are all highly rated, #1 solutions for sales and marketing professionals. These solutions deliver smarter email campaigns, more qualified leads, more productive sales, and ultimately faster growth.

• 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

Who You Are

• 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

Preferred Experience, Skills, and Education

• 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., Who referred you to this position? Enter their first and last name here., Invitation for Job Applicants to Self-Identify as a U.S. Veteran

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• a veteran of the U.S. military, ground, naval or air service who is entitled to compensation (or who but for the receipt of military retired pay would be entitled to compensation) under laws administered by the Secretary of Veterans Affairs; or
• a person who was discharged or released from active duty because of a service-connected disability.

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Validity is a truly unique company - massive revenue growth, top-tier investors, 5-star product ratings, proven ability to acquire and integrate top tech companies and welcome them into the Validity family, a winning culture, and a work environment that fosters hard work, trust, and fun. Headquartered in Boston, Validity has offices in Denver, London, Sao Paulo, and Sydney. For more information, connect with us on LinkedIn, Instagram, and Twitter., We are focused on identifying local candidates who can work a hybrid office-based position (Tuesday, Wednesday and Thursday) in the team's Boston, Massachusetts location. This role is not eligible for remote work or relocation. Please select the below option that confirms your workplace availability:* Are you a current or former employee of Validity or its acquired companies (CRMfusion, BriteVerify, AppBuddy, ReturnPath, 250ok, or Litmus Software, Inc.)?* Please let us know what base salary would make sense for you at this point in your career.* How soon would you be able to start with our company if you were chosen for the role?* Will you now or in the future require sponsorship for employment visa status?* Do you currently have the legal right to work in the United States?*