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.