Wizeline, a global AI-native technology solutions provider, develops cutting-edge, AI-powered digital products and platforms. We partner with clients to leverage data and AI, accelerating market entry and driving business transformation. As a general community of innovators, we foster a culture of growth, collaboration, and impact.With the right people and the right ideas, there’s no limit to what we can achieve.Sounds awesome, right? Now, let's make sure you're a good fit for the role:Key ResponsibilitiesAbout the RoleWe are looking for a Java Developer with a foundation in core Java engineering and an eagerness to build modern, AI-powered applications. In this role, you will work on scaling backend microservices while leveraging emerging AI frameworks to integrate Large Language Models (LLMs), RAG (Retrieval-Augmented Generation) pipelines, and intelligent automation into our enterprise platform.Key ResponsibilitiesBackend Engineering: Design, build, and maintain scalable RESTful APIs and microservices using Java and Spring Boot.AI & LLM Integration:



Connect backend systems with modern LLM provider APIs (OpenAI, Anthropic, Ollama, Hugging Face) using Java AI libraries like LangChain4j or Spring AI.Vector Search & RAG: Assist in integrating vector databases (e.g., pgvector, Qdrant, Pinecone, or Milvus) to support intelligent search and contextual knowledge retrieval.Collaboration & Testing: Write clean, testable code (JUnit/Mockito) and collaborate with product managers, frontend engineers, and DevOps to ship AI-enhanced features.Qualifications & Skills7 years of hands-on software development experience with Java 17+.Strong experience with Spring Boot, REST API design, and microservice architectures.Experience with relational databases (PostgreSQL, MySQL) and ORM tools (Hibernate/JPA).Familiarity with containerization (Docker) and modern CI/CD workflows.Basic AI / LLM Knowledge:Understanding of core LLM concepts (prompts, context windows, tokens, embeddings, and tem

📌 Senior Java (Barcelona)
🏢 Wizeline
📍 Barcelona