Founding Product Engineer ($165K - $215K + Equity) at Cranston AI

About the role

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.

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.

About the team

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.

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.

Qualifications

• 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.

Pay

Salary $165K - $215K + Equity