Senior Software Engineer, AI Agents TL;DR: • Own the architecture of the agent platform that runs marketing for brands like AG1, Harry's, Grüns and Liquid I.V. • Lead a small engineering team while staying a strong individual contributor • $5M ARR, 5x'ing this year, consistently cash-flow positive, YC-backed. In person in Lehi, UT. What is Zaymo? Zaymo builds the tools AI agents use to do marketing, for the largest ecommerce brands in the world. ~500 brands, including Grüns, Harry's, AG1 and Liquid I.V. (Unilever), run on Zaymo. Our wedge is interactive email. We made emails work like websites: shoppers buy, swap or skip a subscription without leaving the inbox. It closes 75%+ of the brands we pitch and put us inside the email programs of hundreds of the best brands in ecommerce. (That's what you'll see on our website today.) What's next is agents. Brands pay agencies ~$70k a year to run email, and the good ones run one or two tests a month. Our agents audit the program, write and design on-brand campaigns, QA them, and run hundreds of experiments optimized for profit, not just revenue. We build for the agent a marketer already uses (Claude, via MCP), not yet another chatbot. Why Zaymo? • 🚀 Growth: $5M ARR today, on track to 5x this year and reach $20M next year • 🏦 Efficient: Raised ~$2M and consistently cash-flow positive. We never need to raise to stay alive. • 📦 Real scale: 100M+ orders a year flow through our brands, and tens of millions of shoppers interact with Zaymo emails every month • 🛠️ Team: 19 people (ex. Harvard, Cornell, NASA, Route, Weave, Levo), backed by Y Combinator and the co-founder of YouTube What you'll own • The architecture of our agent platform: a shared brand-intelligence layer (voice, products, offers, customer data, past performance), an orchestrator that plans and tracks work, and specialist agents for auditing, creative, QA and analytics • The tools that let agents take real, safe actions in Klaviyo, Shopify and Recharge on behalf of brands doing hundreds of millions in revenue • The data and experimentation platform behind our LTV tests • Raising the engineering bar: reviews, mentorship, and turning roadmap bets into shipped product Stack: TypeScript end to end: React Router, Supabase/Postgres, ClickHouse, Vercel, AI SDK, Claude, MCP. What would make you stand out? Required: • 3+ years of full-time software engineering experience (ideally 5+) • Strong individual contributor skills, especially in React/TypeScript • Ability and willingness to work in person in Lehi, UT Preferred: • Shipped LLM or agent systems to real users • Full stack experience at early-stage startups, ideally having seen a company grow through Series A/B • Stats or data engineering background • Strong side projects • Positive attitude, love for building, and always learning What are the perks? • Competitive salary and meaningful equity • Health insurance 100% covered for you and your family, plus dental and vision • Catered lunch every day, Monday through Friday • Unlimited paid time off • $100/month ecommerce stipend to shop our customers' brands • On-site gym, showers and pickleball courts • We cover relocation to Utah What is your interview process? • We review your materials (application, resume, past projects, GitHub). • We do a 20-minute intro call over Zoom to make sure we're on the same page. • We do a 60-minute systems design session talking through one of our current roadmap projects. • We give you a short take-home (1-2 hours) to build something related to our design discussion. • We do an on-site in person to meet the team and talk through what you built. • We give you a decision within a week. How can I get looked at fast? When applying, instead of a cover letter, include concise, no-fluff answers to the following questions: • How did you hear about Zaymo? • Why did you decide to apply? • What is the most impressive / interesting thing you have built? • Link something you've built with LLMs or agents. Read more about working at Zaymo here. The salary range for this role is $130,000 to $180,000, plus 0.10% to 1.00% equity. This is the lowest to highest salary we in good faith believe we would pay for this role at the time of this posting. This compensation range may also be modified in the future. As an equal-opportunity employer, we are committed to building an inclusive environment where you can be you. We work hard to evaluate all employees and job applicants consistently, without regard to race, color, religion, gender, national origin, age, disability, pregnancy, gender expression or identity, sexual orientation, or any other legally protected class.