Quality Control Engineer

Quality Control Engineer – AI & LLM Services

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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

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• 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

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• 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

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• 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

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• Signing bonus xcskxlj and retention bonus
  
• Hybrid working & flexible 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

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• Mid‑Senior level
  

Employment type

• 
  
• Contract
  

Job function

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• Information Technology
  

Industries

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• Software Development
  

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