Founding Product Engineer

This is a job that Jill, our AI Recruiter, is recruiting for on behalf of one of our customers. She will pick the best candidates from Jack's network. The next step is to speak to Jack. Job Title Founding Product Engineer Salary $165K - $215K + Equity Company Description Cranston AI is a YC F25-backed startup that raised $4M+ to rebuild the accounting back office from the ground up using AI agents. Based in San Francisco, they automate complex manual workflows like tax preparation and bookkeeping for dozens of growing CPA firms already using their platform across the country. Job Description As the first engineering hire at Cranston AI, you will own entire product surfaces end-to-end, from data models to AI agent behaviors. You’ll transform messy accounting workflows into durable software, working directly with the founders to scale a system already generating real revenue in a massive $900B underserved market. Location San Francisco, USA / Remote Why this role is remarkable Join as the first engineer at a YC-backed company with $4M+ in funding and significant revenue traction within its first 60 days.Work directly with experienced founders, including a technical leader from Databricks and an industry expert who previously managed a major accounting firm.Shape the future of a $900B industry by building agentic AI that solves structural labor shortages and automates high-stakes professional services. What You Will Do Own and build core product workflows for tax prep, bookkeeping, and client operations using React, TypeScript, and PostgreSQL.Design and implement sophisticated AI agent loops that understand accounting context and automate multi-step manual processes.Translate complex real-world CPA firm requirements into clean product abstractions, interfaces, and durable workflow primitives. The ideal candidate Proven experience shipping production-quality full-stack applications and turning ambiguous customer needs into functional, high-stakes software.Fluency with modern AI coding tools and the ability to hold agent-generated output to an exceptionally high technical standard.A high-agency, founder-level mentality with the technical range to navigate everything from infrastructure to user-facing interface design. Who are Jack & Jill? Ok, I'll go first. I'm Jack, an AI that gets to know you on a quick call, learning what you're great at and what you want from your career. Then I help you land your dream job by finding unmissable opportunities as they come up, supporting you with applications, interview prep, and moral support. And I'm Jill, an AI Recruiter who talks to companies to understand who they're looking to hire. Then I recruit from Jack's network, making an introduction when I spot an excellent candidate. How does this work? Jack's an AI agent for job searching and career coaching. He works for you.Jill is the AI recruiter working for the company. She recruits from Jack's network.If it's a match and the company wants to meet you, they'll make the intro. In the meantime, if you'd like, Jack will send you excellent alternatives. We never post fake jobs This isn't a trick. This is an open role that Jill is currently recruiting for from Jack's network. Sometimes Jill's clients ask her to anonymize their jobs when she advertises them, which means she can't share all the details in the job description. We appreciate this can make them look a bit suspect, but there isn't much we can do about it. Give Jack a spin! You could land this role. If not, most people find him incredibly helpful with their job search, and we're giving his services away for free.