Founding Engineer @Plato (backed by Hexa)

Plato is building the OS for litigation lawyers. With GenAI, the legal industry is on the verge of a major transformation. Litigation lawyers are overwhelmed by complex and repetitive tasks: complex damage calculations, thousands of documents to review, days spent drafting legal documents, and more. ⚡ Our mission: Build the leading OS for litigation lawyers, enabling lawyers to spend 5x less time on administrative and operational work, and focus instead on strategy and advocacy. Plato already supports around ten law firms and 1 major insurance’s legal team specialized in personal injury, who use our solution daily to manage hundreds of active cases. Founded in January 2026 by Ben (CEO) and Alexandre (CTO), we are backed by Hexa (formerly eFounders), Europe’s leading startup studio. Hexa has launched over 35 companies, including unicorns such as Front, Aircall, and Spendesk, collectively generating more than €230M in ARR and raising over €750M in funding. Plato is already live with real users and real data, solving concrete legal workflows in production. We’re now entering a key building phase and looking for someone ready to take real ownership and help shape the product, architecture, and engineering culture from day one. 🎯 Your mission We’re looking for a Founding Engineer to join as our first hire and work hand-in-hand with Alexandre - Co-founder & CTO. You’ll help build the core product from the ground up: production AI systems, backend architecture, and user-facing features used daily by law firms and insurers. This is not a research role. It’s about turning cutting-edge AI into reliable, real-world software in a complex, high-stakes domain. You’ll shape product decisions and own systems end-to-end, from early prototypes to production. You’ll have a major impact on what we build, how we build it, and how engineering evolves at Plato. Responsibilities Product & Engineering •Design, build and ship core features across platform, AI pipelines and integrations •Own technical architecture choices with scalability, security, and compliance in mind •Work closely with the founding team and studio partners from ideation to production •Take part in every high-impact technical decision that will shape the product AI & Production Systems •Build and evolve production AI pipelines (LLMs, RAG, agent-based systems) for real legal workflows •Ensure reliability, traceability, and explainability of AI outputs •Continuously optimize performance, cost, and quality as the platform scales Ownership, Quality & Scalability •Own systems from build to production, with a strong focus on quality, reliability, and scalability •Support live deployments with law firms and insurance companies •Help define how engineering is done at Plato (processes, standards, tooling) 🤩 This role is for you if You’re an experienced, product-minded engineer who enjoys building real systems in complex environments and owning things end-to-end. You like working close to founders and users, making pragmatic technical decisions, and shipping software that actually runs in production.