Agent / AI Engineer - Zaragoza, Spain

About Complete Robot

We are an early-stage, venture-backed company building AI-enabled systems for automated physical environments.

The company works at the intersection of AI agents, connected devices, user experience, machine data, and real-world commercial operations.

For candidates who can start immediately, there may be an opportunity to join the founding team in San Francisco, stay with the team, and build together from a prestigious San Francisco accelerator environment. This is subject to availability, travel and visa requirements, role fit, and mutual agreement.

We are looking for an Agent / AI Engineer to build AI workflows that interact with real-world systems, data, users, and operational tools.

This is a production AI role, not a generic chatbot role. The systems must be useful, reliable, measurable, safe, and connected to real products and real environments.

Responsibilities

• Build AI agents and workflows for customer-facing and operator-facing use cases.
• Design tool-use patterns that allow AI systems to interact safely with backend systems and device data.
• Build retrieval, structured outputs, evaluations, prompts, guardrails, monitoring, and fallback behavior.
• Work with product and design to create trustworthy AI user experiences.
• Work with backend and edge engineers to connect AI workflows to real system data.
• Measure AI performance in terms of task completion, accuracy, safety, user experience, and commercial value.
• Support demos, pilots, and iteration based on customer feedback.

Requirements

• Experience building AI, LLM, agentic, conversational, recommendation, or automation systems.
• Strong programming ability in Python, TypeScript, or similar.
• Experience with LLM APIs, tool calling, retrieval, structured outputs, evaluations, and production AI workflows.
• Understanding of prompt engineering, RAG, agent orchestration, AI evaluation, and common AI failure modes.
• Ability to build systems that are reliable, useful, and maintainable.
• English fluency required.

Must Haves

• Experience with AI agents for commerce, customer support, retail, payments, kiosks, robotics, voice interfaces, or physical-world systems.
• Experience with personalization, recommendations, or conversational UX.
• Experience with permissioning, user authentication, transaction approval, or safety-critical workflows.
• Experience with multilingual AI systems.
• Experience with speech, audio, multimodal AI, or on-device AI.

Success in the first 90 days

• You build the first working AI workflow for a product demo.
• You connect AI workflows to relevant data and safe system actions.
• You create an evaluation framework for usefulness, accuracy, and safety.
• You help produce compelling demos for partners and investors.

Success in the first 6-12 months

• AI workflows are running in real pilot environments.
• The AI layer has guardrails, evaluation, monitoring, and measurable value.
• You become a key owner of the company's AI systems.

Our Commitment to Diversity

We celebrate diversity and are committed to creating an inclusive environment for all team members.