Quality Engineer (Artificial Intelligence / Machine Learning) - Hybrid in BarcelonaA fantastic opportunity for a Quality Control Engineer to join a fast-growing deep-tech company, providing hyper-efficient software to global companies across finance, energy, manufacturing, and cybersecurity, helping them gain an edge with quantum computing and artificial intelligence.Quality Control Engineer (AI & LLM Services)This is initially a Fixed Term Contract - Hybrid from their site in BarcelonaResponsibilitiesEnsure the reliability, robustness, and performance of our AI-driven solutions, applications, and products we deliver to clients.Collaborate with engineers, project managers, customers and product teams to define acceptance criteria.Evaluate system quality under varied operational conditions, ensuring scalability, latency, and data integrity meet project and client expectations.Create and standardize quality control and reporting across projects.Develop and maintain comprehensive test suites tailored to AI systems and ML workflows.Design and implement automated and manual testing frameworks for LLM-based applications, including chatbots, RAG systems, APIs, and data pipelines.Contribute to continuous improvement of QA processes, enforcing best practices in testing, documentation, and validation of ML and LLM pipelines.Act as a point of contact for quality validation, ensuring that final deliverables meet both technical and functional excellence standards.Required QualificationsMaster’s degree in Computer Science, Data Science, Software Engineering, or a related field.2+ years of experience in software or ML project quality assurance, focusing on functional, performance, and automation testing.Demonstrated understanding of testing methodologies for AI/ML systems (e.G., reproducibility, model output validation, bias detection).Familiarity with modern ML and LLM workflows (Python, APIs, cloud ML platforms).Proficiency in English; Spanish or French is a plus.By applying to this role you understand that we may collect your personal data and store and process it on our systems. For more information please see our Privacy Notice ( LevelMid-Senior levelEmployment TypeTemporaryIndustriesSoftware Development, IT System Custom Software Development, and IT System Design Services#J-18808-Ljbffr