Quality Control Engineer

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

• Competitive salary
• Signing bonus and retention bonus
• Fixed-term contract ending June 2026
• Hybrid working & flexible hours
• Relocation support (if needed)
• Equal pay guaranteed
• 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.