Backend/Data Specialist

About the job

We’re hiring a Founding Engineer (TypeScript, AI, B2B SaaS) at Certo.

Certo’s goal is simple and insanely ambitious:

Make shipping a new physical product as fast and reliable as shipping code. Think CI/CD for regulated products.

Today, if you want to launch a cosmetic, a medical device, or a new food product, you’re stuck in a maze of regulations, PDFs, spreadsheets, consultants, and months of back-and-forth with authorities and internal teams.

We want to get that friction out of the way of business:

Turn regulations into code.Turn audits into a click.Turn “Can we sell this product here, with this label and these suppliers?” into a question you can ask an AI system and get a documented, defensible answer.If we do this right, we free up a massive amount of innovation: small brands can launch globally, big groups can move 10x faster, and regulators still get more transparency and better evidence than they do today.

We’re still very early. Tiny team, real customers, huge problem space. This is not “an AI feature”. We want Certo to become the compliance fabric for physical products – something that can realistically be one of the most impactful companies of this century in how products get created and regulated.

What you’ll do

• Own and ship major parts of our product end-to-end (from API to UI).
• Design and build multi-tenant SaaS architecture: orgs, projects, permissions, audit logs.
• Build and evolve LLM/agentic workflows for compliance checks (ingredients, labels, documents, markets).
• Work across TypeScript/Python, queues/jobs, storage and APIs to make our agents reliable and observable.
• Collaborate directly with the founders, sit in on customer calls, and turn messy regulatory workflows into clean product flows.
• Lay the foundations of our engineering culture: code quality, speed, pragmatism, and a healthy respect for reality.

You might be a good fit if you:

• Have early-stage B2B experience (ex-founder / first engineer / small startup team) and like owning things end-to-end.
• Have built products around sensitive or regulated workflows (compliance, fintech, legal, health, security, risk) where audit trails and “why did the system say this?” really matter.
• Are strong in TypeScript/Python and enjoy building systems: multi‑tenant SaaS, queues/jobs, clean APIs, solid data models, some frontend.
• Enjoy AI-native coding – treating prompts, tools, agents and evaluation as part of the codebase, and making AI systems reliable, testable and debuggable.
• Have shipped LLM / agentic features in production (multi‑step workflows, tool calls, retrieval, evaluation, deep agents).
• Want to help build the CI/CD pipeline for physical products and replace slow, manual, dinosaur processes with something modern and sane.

We’re based in Paris. Competitive salary + meaningful equity, and a chance to shape the product, the architecture, and the company from the ground up.