As a Senior Lead Internal AI Architect on the IT Leadership Team, you will define and execute the strategy for embedding artificial intelligence into Klaviyo's internal operations, infrastructure, and workforce experience. You will serve as the principal architect and strategist for designing secure, scalable, and efficient AI-driven systems that transform how IT delivers value to the business. Your scope will include everything from integrating AI into infrastructure and automation frameworks to building internal AI platforms for experimentation and enablement. You'll collaborate closely with IT, Security, Risk and Trust, and Engineering to modernize the company's technology foundation and enable an “AI-native” workforce. You will also act as a key influencer across the organization, shaping standards for AI adoption, driving responsible innovation, and mentoring teams as Klaviyo evolves its internal architecture toward intelligent, automated, and resilient systems.