Founding Designer
Design · Full-time
Paris, France
EUR 70k-100k / year + Equity
Posted on Nov 4, 2026
🚀
Founding Designer
🎯 Key Information
Location: 198 rue Lafayette, Paris 10ème
Type: Full-time, On-site (1 day of remote work per week)
Start date: ASAP
Compensation: 70-100k€ + BSPCE
🧠 Our mission : Build the software trust runs on
Markets run on trust. Someone, somewhere, checks that the numbers are what they say they are: the due diligence team whose report moves capital, the auditor who signs an opinion. The world spends more than $230 billion a year on that work, and it is still mostly done by hand, one document and one reconciliation at a time.
AI is driving the cost of reconciling a figure to its source toward zero. Every contract can be read, every entry traced, every balance tested, on every engagement.
But more analysis is not the same as more trust. A model can verify a number. It cannot sign an opinion or sit across from a CFO. Trust is still created by accountable people. The limit is no longer how much can be analysed. It is how much of that analysis an accountable person can direct, understand and stand behind.
That is what we build: the AI-native operating system for the firms whose signatures move capital. AI agents execute complete workflows under built-in controls. Professionals step in where judgment is required, and own the conclusion.
We started with financial due diligence, the most compressed and consequential form of verification there is. Statutory audit is next.
👨🚀 The Role: Founding Product Designer
You’ll be Opio’s first in-house designer, and you’ll own the Opio experience end to end.
What you’ll do:
Own product and UX direction: define the principles the product runs on, keep them alive as we ship, and convince the founding team of your calls.
Design critical flows for a dense profession: put yourself in the shoes of a TS analyst or an auditor, speak their language, and get into the material (accounting, QoE, the audit file) so that every choice holds up in front of a senior professional.
Design for trust in probabilistic output: how does a professional trust what a model produced? This is the heart of the product, and it is a design problem.
As the founding designer, you cover everything design at Opio: mostly the product, and also what sits around it when it matters, like the website or an ad campaign.
✅ Who we’re looking for
Must have:
A senior product designer who has shipped complex B2B products, ideally the whole way: research, flows, interface, production
You’ve designed AI-native products: you know the UX questions that come with probabilistic outputs, and you’ve already answered some of them
Comfortable in code: you can implement part of your own work with coding agents, and talk to engineers as a peer
Real autonomy: you frame a fuzzy problem, decide fast, and know when to stop designing
Fluent English: our clients and our ambitions are international