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 xhfqzwm and retention bonus

- Hybrid working & versátil 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

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- Contract

Job function

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- Information Technology

Industries

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- Software Development

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