Job Overview We’re looking for Staff Engineers to lead the shift toward AI‑powered Business Management software, not as an add‑on, but as a core part of how people work, decide and grow. Idóneo candidates: * Think about AI as part of how they engineer, not a feature they add. * Get energy from shipping things and seeing them work in the real world. * Care more about what they build than what their title says. What Are We Looking For? * Solid depth in both backend and frontend software engineering. * Experience with cloud platforms such as AWS, Azure, or GCP. * Shipment of real products to production, not just prototypes. * Strong understanding of APIs, cloud platforms, and system design. * Recognized as a technical and cultural leader, holding the bar high. * Pushback on processes that do not serve the team, from hiring to deployment. * Drive adoption of new abstractions and ensure they are usable. * Built real AI‑powered systems or workflows, not just tinkered with them. * Shipped tangible impact, whether at work or on the side.



* Lead key technical decisions and create foundational work used across the company. * Communicates clearly in English; Spanish is a plus. What You’ll Be Doing * Define how we build AI at scale and shape design, build, evaluate and run AI‑native product experiences. * Lead spec‑driven development, driving clear expectations before shipping. * Build reusable AI foundations to prevent patchwork experiments. * Design and evolve modular, reusable AI skills that automate real workflows. * Establish robust evaluation frameworks for trustworthiness and reliability. * Shape retrieval‑augmented generation strategies that balance probabilistic models with deterministic truth. * Architect human‑in‑the‑loop and agentic workflows combining LLMs, rules, and oversight. * Own systems end‑to‑end, from problem discovery to long‑term maintenance. * Stay connected to customers for context‑driven decisions. * Partner with Product, Design, and Leadership to weave

📌 Staff Software Engineer (Barcelona)
🏢 Factorial
📍 Barcelona