Our partner is looking for a Lead Engineer, AI Platform based in Spain.
This role offers the opportunity to lead the engineering foundation behind reliable, measurable, and scalable AI-powered features. The position combines hands-on software engineering with technical leadership and people management. You'll investigate quality issues across complex agent workflows, develop datasets and evaluation systems, and run experiments across models, prompts, and agent architectures. You'll also help optimize AI systems for cost, latency, reliability, and overall user experience. Working in a highly remote and asynchronous environment, you'll collaborate closely with AI engineering teams while shaping the technical direction of a growing AI Quality function.
Develop observability and diagnostic capabilities to identify exactly where quality issues occur across planning, execution, tool selection, and complex agent trajectories.
Set the technical direction and manage day-to-day priorities for the AI Quality engineering team while remaining actively involved in hands-on development.




Partner closely with AI Core engineering teams to ensure changes to AI products can be measured effectively and demonstrably improve quality.
7+ years of experience building and shipping production software, ideally including LLM-powered agents capable of taking real actions within products.
Experience working with complex, tool-using AI systems involving multiple tools, planning, orchestration, or sub-agents rather than only simple, single-turn assistants.
Strong ability to demonstrate shipped software and explain how its effectiveness and reliability were measured.
Experience with Ruby on Rails and/or Python, with the ability to become productive quickly in technologies that may be new to you.
Experience designing datasets, annotation workflows, or labeling pipelines for machine learning or AI evaluation.
Excellent English proficiency in spoken, written, and reading communication, equivalent to C

📌 Lead Developer (España)
🏢 Jobgether
📍 España