Founding Fullstack engineer (Python + React.js)

TL;DRWe're building the next Netsuite/Odoo for the AI-age (an enterprise operations platform)Founded by the team that scaled GitGuardian and talent.ioBacked by top-tier VCs (3M€ pre-seed)Thrive in fast-paced AI-startupOnce-in-a-lifetime opportunity to join a tight-knit, world-class early teamCompetitive salary plus equity ownershipLocation: Fully remote, France. What you'll buildResponsible for building and maintaining product features across their full lifecycle: from initial technical design to implementation, deployment and monitoring. You’ll work across the frontend and backend, and collaborate closely with founders to ship customer-facing features with real impact.Product features used daily by professionals. Built in React, TypeScript and PythonA clean frontend UX: responsive, accessible, fast, and reactive to real-time dataBackend APIs that are clean, consistent and performant using Django (django-ninja) and PydanticA database model optimized for complex workflows, high-frequency queries and AI interfacingObservability of the features you own.Foundations for AI-native interfaces (RAG, agents, orchestration logic) woven into the product layer, not bolted onWho we wantWe’re assembling an exceptional founding team and are looking for a Founding Fullstack Engineer with startup experience. If you want to build and ship end-to-end, own massive impact, and shape a world-class company from day one, let’s talk.You needExpertise in python web backend development (Django optional)Strong frontend engineering skills with React and TypeScriptDeep knowledge of API design, data modeling and query optimizationUnderstanding of monitoring, observability and debugging in productionFamiliarity with distributed systems and asynchronous data flowsExperience building responsive, accessible UIsGit proficiency and comfort in modern CI/CD pipelinesDon’t meet every single requirement? If you’re excited about our mission and confident you can deliver outcomes, we encourage you to apply.Bonus pointsWe don’t expect you to be a unicorn but deeper experience in some of these areas would be highly appreciated:Experience with React Query, Tanstack Router.Hands-on work with Grafana and PrometheusExposure to AI features (RAG, agent orchestration, vector search)How we workTotal ownership: End-to-end impact.Zero bureaucracy: Small, agile team driving rapid execution.Craft with velocity: We move fast by shipping small and never compromising on excellence.Radical prioritization: One goal at a time, done right.No egos: Feedback with recommendations can come from anyone, across any team.What you’ll getCompetitive salary + meaningful equityExceptional peers and a cutting-edge AI stackIdeal equipment and setup (top-tier gear, remote-friendly)Regular company offsite (2–4 times per year) in great locationsLocation: Fully remote, France. ProcessWe value efficiency and clarity. The entire process takes no more than 2 weeks:40-minute intro call with Eric (CEO).90-minute technical interview with Eugène (CTO).30-min cultural-fit interview with Florian (CRO)2 days paid assessmentOffer: If it’s a match, we move fast.Interested?Send an email to Eric and Eugène at founders@pistonhq.app and let us know why you want to join.