Company Description Lifesight is the Agentic Unified Marketing Measurement Platform. We unify causal MMM, incrementality testing, and attribution into one system that marketing and finance teams trust — and that AI agents can call. We're bootstrapped-to-scale and profitable. Our products are agentic. Our internal operations should be too. Role Description You'll be a founding GTM Engineer at Lifesight, building the systems that help our marketing, sales, and customer success teams operate at 10×. You won't replace those teams — you'll give each person on them AI leverage backed by clean data, well-designed tooling, and agentic workflows. GTM Engineer is a fairly new discipline. Hybrid of software engineer, RevOps engineer, and agent builder. You ship production code with Claude Code every week. You work shoulder-to-shoulder with go-to-market teams — you're not a ticket-taker — and your work spans the entire customer lifecycle from first-touch to renewal. What you'll own: The GTM data l...