Software Quality Assurance Engineer - AI / LLM / Machine Learning

We're hiring for an experienced Software Quality / QA Engineer with experience in AI / ML / LLMs for a rapidly expanding deep tech company that is backed by major global investors.

In this position, you will be responsible for ensuring reliability, performance and robustness for AI‑driven solutions and applications. You will develop test suites for AI systems and ML workflows, design automated and manual testing frameworks for LLM applications, and ensure overall quality.

This is a contract position until the end of June 2026 with potential scope to extend.

You will be working hybrid in Barcelona: approximately 2‑3 days per week on‑site and the rest of the week remote.

These contracts will be payrolled directly with the hiring company. Salaries between 40k‑55k + bonuses.

Responsibilities

• Ensure reliability, performance and robustness for AI‑driven so...