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

Software Development

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