Experteer Overview As a Staff Software Engineer at Factorial, you will lead technical initiatives that bring AI-native features to production-grade HR software. You’ll build with Rails and React, shape system design, and ship product in close collaboration with Product and Design. The role centers on integrating LLM APIs to deliver real customer value, not on model training. You’ll influence architecture, create reusable components, and mentor the team, all while upholding reliability and compliance in AI features. This is a high-impact opportunity to steer AI product engineering at scale in a fast-growing, cross-functional environment.Compensaciones / Incentivos
- Set technical direction for meaningful roadmap areas
- Collaborate closely with Product and Design from early conversations
- Own end-to-end systems from problem framing to production rollout
- Engage with customers to inform technical decisions
- Define how to build AI features at scale, with reliability and compliance




- Promote spec-driven development and reusable components
- Develop AI skills and tools to automate workflows
- Ensure data sources and LLM outputs are balanced with truth and determinism
- Mentor and raise engineering standards across teamsResponsabilidades
- Solid depth in both backend and frontend software engineering
- Production-grade product delivery experience
- Strong API, cloud platform (AWS/Azure/GCP), and system design knowledge
- Experience integrating LLM APIs into product features
- Proven leadership and ability to influence across teams
- Clear English communication; Spanish is a plusRequisitos principales
- Competitive ESOP plan
- Private health insurance
- Wellhub fitness benefits
- Cobee for expenses
- Language classes
- Breakfast in the office and organic fruit

📌 Staff Software Engineer (Madrid)
🏢 Factorial Hr
📍 Madrid