Note: The job is a remote job and is open to candidates in USA. Ironbooks Financial is an innovative company focused on AI-powered bookkeeping solutions for trades contractors. They are seeking a Founding Software Engineer to take ownership of their platform, improve the existing codebase, and drive the development of new features to scale their client base significantly.
Responsibilities
- Take over the codebase and make it stronger. Not rebuild it. Improve it
- Own our number one priority: every number on a client's books is provably correct. A real example of the work: contractors' books routinely arrive with bank deposits coded straight into revenue on top of the invoices for the same jobs, quietly overstating income. We built a scanner and ran it across every client file within days. Finding and killing that class of problem is the job
- Own the automation that writes to live QuickBooks ledgers every night: guardrails, idempotency, closed-period safety, and the verification score for every monthly close. The score runs in shadow mode today; you take it to enforced, so no statement ships below the bar
- Build our Plaid layer from the ground up. Direct bank and card connections, reconciliation against actual bank truth in near real time, and eventually live cash-flow dashboards and forecasting for every contractor on the platform. This is the future of the product and it is yours to architect
- Build the safety net an AI-built system needs at scale. Today that net barely exists: a handful of tests, no staging, migrations applied by hand. The job is to keep the shipping speed and add the net: tests on the money paths, staging, migrations, and monitoring that catches silent failures in minutes, not days
- Ship fast with AI tools every day, the same way the product was built
Skills
- 2-4 years shipping production web apps, with at least one stretch as the primary or only owner of something real users depended on
- You live in Claude Code or Cursor. AI-assisted development is how you work, and you know how to verify what an agent gives you before it touches money
- Full-stack and happy owning everything: frontend, backend, database, integrations, deploys, and the operational grunt work that keeps it all alive
- You care about getting numbers right. If a dashboard shows a total that is off by 12%, that ruins your day until you know why
- You would rather improve a working system than tear it down to feel comfortable
- You love UI/UX and are happy to get on a call with a customer to get ideas and work through issues and ideas
- Bonus: you know your way around a P&L, or you genuinely want to learn bookkeeping
Benefits
- Up to 2% equity, 4-year vest with a standard 1-year cliff
- Remote, North American ONLY (no overseas)
Company Overview