We are seeking a Frontend Engineer to contribute to the development of advanced interfaces that support cutting-edge AI and data-driven workflows.This role is ideal for someone who enjoys transforming complex technical ideas into clean, efficient, and intuitive user experiences. You’ll be working in a fast-paced environment alongside product specialists, designers, and researchers who rely on your work to visualize and interact with sophisticated backend systems.What You’ll Do- Build modern, scalable web applications using React or Next.Js with TypeScript, ensuring clean architecture and maintainable components.- Collaborate closely with product and research teams to design UI flows that simplify complex processes and experimental insights.- Integrate and consume APIs (REST or GraphQL), ensuring efficient data handling and high-quality rendering of dynamic information.- Translate early-stage technical concepts into polished internal tools through quick iteration and user feedback.- Focus on performance optimization, usability, and accessibility to deliver seamless user experiences.- Work with backend engineers on features powered by Python-based services and cloud-native infrastructure.- Contribute to deployment workflows supporting AWS and cloud environments .Required Qualifications- 1–4 years of professional experience building web applications with React or Next.Js + TypeScript .- Working knowledge of Python, especially for collaborating on backend features or understanding service interactions.- Understanding of cloud platforms (preferably AWS) and modern development environments.- Strong experience with component-driven UI development, state management (Redux, Recoil, Zustand, etc.), and responsive design systems.- Solid experience integrating APIs and handling frontend data workflows.- Ability to operate in rapid development cycles, converting prototypes and research concepts into robust tools.- Strong communication and team-collaboration skills.Nice to Have- Experience creating dashboards, analytics interfaces, or tools for technical or research-oriented users.- Familiarity with LLM or AI tool ecosystems (Hugging Face, OpenAI, LangChain, etc.).- Knowledge of data-visualization frameworks (ECharts, Plotly, Recharts, etc.).- Understanding of authentication and secure frontend application patterns (OAuth2, JWT).- Interest in building tools that support machine-learning, AI, or automation workflows.Contract Details- Fixed-term contract- Based in Zaragoza, with 3 days per week onsiteIf this opportunity motivates you or fits your experience, apply now or email .