Mid-level AI Product Developer

About Nance

Nance is an AI financial controller colleague: an agent that works across the whole financial stack, from accounting software like ERPs to broader business software like email and Slack. She helps finance teams and accountants get mundane tasks done and derives complex insights from diverse data sources. Our mission is to make Nance feel and operate like the best finance employee anyone has ever hired.

As a team we believe fast iteration can only happen in an environment with minimal process, individual agency and trust in each other’s work.

We’re a small engineering team with a high bar and few layers of process. You’ll report directly to our hands-on founding team.

The role

You’ll own user-facing product features end-to-end. That means deciding what to build from thin specs and direct user feedback, prototyping quickly, shipping to production, and measuring whether it actually works. There’s no handoff: no waiting for a product manager to write the spec, and no separate team to throw a prototype over the wall to.

A large part of the product is the agent itself. You’ll ship improvements to what it can do, and help build the evaluation muscle to know whether a change made it better.

You’ve shipped production software before and can work independently. Here you’ll take on bigger, more ambiguous problems, with the founding team close by.

What you'll do

• Work on the core capabilities of the Nance agent: the agent harness, tools and supporting features like memory management.

• Build evals that tell us whether the agent behaves the way it should, and experiment with new techniques for testing and observing agent behavior.

• Take product features from idea to shipped and adopted: shape the scope, build the full stack (React frontend, Python backend, Google Cloud infra), launch, instrument and iterate.

• Sweat the details: UX, speed and polish are part of the job.

• Use AI coding tools as a default part of your daily workflow, and help raise the bar for how the team uses them.

What we're looking for

• 2 to 5 years of professional software engineering experience, with meaningful time on customer-facing product work.

• You’ve built LLM-powered features, ideally in production for real users, and you can tell us how you knew they worked.

• Strong full-stack experience. Knowing software engineering fundamentals matters more than knowing the details of our stack.

• Product sensibility: you care about UX, speed and polish, and you push back when something doesn’t feel right.

• Comfortable without PM overhead: you shape the problem, not just the solution.

• Daily user of AI coding tools (Claude Code, Codex or similar) and enthusiastic about them as a way to build software.

• Rigorous about correctness and data handling.

• Fluent in English. Dutch is a plus, not a requirement.

Bonus points

• Experience with financial data, fintech, or accounting/ERP systems.

• Experience building eval harnesses, experimentation infrastructure, or A/B testing for AI features.

What we offer

• €60.000 to €75.000 gross per year including holiday allowance, depending on experience.

• Equity in Nance, above the market average.

• Visa sponsorship available.

• The opportunity to join an incredibly fast-moving team and company.

• Hybrid working and flexible hours.