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
- Softwa

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