Lead Software Engineer - AI Product Development (Full Stack)

About the role

Clarivate is looking for a Lead Software Engineer for AI product development (full stack) to join its Cortellis team in Barcelona. You will build high-impact product features powered by Generative AI and modern software engineering, taking ownership of end-to-end delivery of scalable backend and frontend solutions. You will work closely with UX and distributed engineering teams to define architecture and deliver customer-facing features.

Key responsibilities

• Lead the design and delivery of scalable backend features, from architecture to production.
• Build and maintain microservices and APIs using Java and Node.js, ensuring performance, reliability and security.
• Take end-to-end ownership of product features, from concept and implementation to rollout and continuous improvement.
• Integrate AI capabilities into the platform, including LLM-based features, RAG patterns and agent workflows.
• Make AI solutions robust and production-ready by improving output quality, managing limitations and optimizing performance.
• Apply prompt engineering best practices and contribute to the development of reliable AI-enabled systems.
• Collaborate with product, engineering and domain experts, contribute to architectural decisions and mentor other engineers.

Required profile

• Bachelor's degree in Computer Science, Engineering or a related field.
• At least 7 years of backend development experience (Java 11/17, Spring Boot, microservices), including RESTful APIs and distributed systems.
• At least 6 years of frontend technology and full-stack product development experience (Angular, Node.js).
• At least 3 years integrating AI capabilities into production systems, including prompt engineering and agent-based workflows.
• At least 6 years delivering end-to-end product features, including CI/CD, monitoring and cloud platforms (AWS or equivalent).

Required skills

• RAG pipeline design and optimization (chunking, embeddings, retrieval orchestration) and AI system evaluation (Ragas, prompt testing, regression evaluation)
• CI/CD pipelines and automation tools (GitHub Actions, Jenkins, Azure DevOps)
• Vector databases and retrieval systems (Azure AI Search, Pinecone, Weaviate, FAISS)
• Responsible AI practices (prompt injection mitigation, PII masking, policy enforcement)
• Experimentation frameworks (A/B testing, feature flags such as Split.io)
• Shared AI services and reusable components

What we offer

• 30 working days of vacation and a volunteering community with paid hours.
• Private health and life and disability insurance.
• Tax-free benefits (restaurant voucher, kindergarten, transport cards).
• Hybrid work, up to 3 days a week in the office, with core business hours in CET.
• Agile environment and digital workplace in Barcelona.