Quality Control Engineer – AI & LLM Services Barcelona | Hybrid | Fixed-term contract (to June 2026) Want to be on the front line of real-world AI quality, validating systems that power next-generation LLMs, chatbots, and AI services used globally? A fast-scaling European deep-tech company at the intersection of AI and advanced computing is hiring a Quality Control Engineer to ensure the reliability, performance, and robustness of cutting-edge AI products. This role is actively hiring with a fast, transparent interview process. Why this role stands out * Work on AI technology that dramatically reduces model size and inference cost * Direct impact on production LLM systems used by enterprise clients * Join a Series‑B‑stage deep‑tech company with strong international backing What you’ll do * Own quality validation for AI & LLM‑based applications (chatbots, RAG, APIs, data pipelines) * Define acceptance criteria with engineers, product teams & clients * Test scalability, latency,



robustness & data integrity under real‑world conditions * Build and standardize QA frameworks across AI projects * Design manual & automated test suites for ML/LLM workflows * Ensure final deliveries meet both technical and functional excellence standards What you bring * Master’s degree in CS, Data Science, Software Engineering (or related) * 2+ years in QA for software, ML or AI systems * Understanding of AI/ML testing challenges (reproducibility, output validation, bias) * Familiarity with Python, APIs & modern ML/LLM workflows * Fluent English (Spanish or French a plus) What’s on offer * Signing bonus and retention bonus * Hybrid working & adaptable hours * Relocation support (if needed) * International, multicultural tech environment If you’re passionate about making AI trustworthy, scalable, and production‑ready, this is a rare chance to do it at the cutting edge. Seniority level * Mid‑Senior level Employment type * Contract Job function * Information Technology Industries * Software Deve

📌 Quality Control Engineer (España)
🏢 DeepRec.ai
📍 España