Our partner is looking for a Senior Backend Developer (Java/Spring Boot, Agentic LLMs) based in Spain. As a Senior Backend Developer, you will contribute to building and enhancing a high-performance technology platform serving the global business aviation industry. You will develop robust backend services and scalable applications using Java and Spring Boot, working across distributed systems, APIs, and event-driven architectures. This hands-on engineering role combines established software development practices with practical applications of large language models (LLMs) and agentic AI workflows. Collaborating closely with product and engineering teams, you will take ownership of features from implementation through testing and delivery. In a remote-first, international environment, you will have the opportunity to influence technical quality, improve system reliability, and apply emerging AI technologies to real-world engineering challenges. Backend development: Design, develop, maintain, and optimize backend services using Java and Spring Boot, delivering reliable, scalable, and maintainable software. Take ownership of software features throughout their lifecycle, from understanding requirements and implementation to testing, debugging, deployment, and ongoing improvement. Build and maintain REST APIs that support web applications, mobile experiences, and integrations with external systems. Implement asynchronous processing and event-driven workflows using Apache Kafka or comparable messaging and streaming technologies. Database management: Design and maintain relational data models using PostgreSQL and Hibernate, with a focus on data integrity, query efficiency, and application performance.



Apply practical knowledge of large language models, retrieval-augmented generation (RAG), agent-tool interactions, and LLM orchestration to develop intelligent backend capabilities and automation workflows. Use tools such as Cursor, Claude Code, and GitHub Copilot to accelerate development while maintaining high standards for code quality, testing, security, and maintainability. Engineering quality: Write clean, well-tested code, apply sound functional programming principles, and contribute to debugging, code reviews, and continuous improvement. Identify opportunities to improve system performance, reliability, maintainability, and development efficiency through modern engineering practices. At least six years of hands-on Java backend development experience, ideally using Java 17 or a comparable modern version. Backend frameworks: Strong experience with Spring Boot 2.x and Hibernate 5.
Database expertise: Solid knowledge of PostgreSQL, relational database modeling, and data persistence using Hibernate or related technologies. Practical experience implementing event-driven architectures and asynchronous processing using Apache Kafka or similar messaging and streaming platforms. AI coding tools: Regular use of AI-assisted development tools such as Cursor, Claude Code, or GitHub Copilot,



combined with the judgment needed to validate generated code, write tests, and maintain software quality. Proficiency with Git, Maven, testing frameworks, debugging techniques, and end-to-end software delivery. Strong collaboration skills and professional fluency in English at B2 level or above, with C1 preferred. Experience with Scala, Kotlin, or functional Java libraries such as Vavr is considered a plus. Search and performance technologies: Familiarity with Elasticsearch, vector search, embeddings, Redis, and performance optimization is beneficial. Cloud and DevOps: Experience with Docker, Kubernetes, AWS, Terraform, and CI/CD pipelines is an advantage. Previous experience integrating LLM-powered features into existing backend services is highly desirable. Remote work eligibility: Ability to work fully remotely from an eligible European country, subject to contractual and country-specific requirements. Fully remote work: Work remotely from an eligible location in Europe, without the need for regular office attendance. Collaborate with a distributed team building a sophisticated technology platform for the general business aviation industry. Take responsibility for meaningful backend features and contribute directly to engineering quality and platform development. Work with Java, Spring Boot, distributed systems, event-driven architectures, and emerging agentic AI technologies. Strengthen your expertise in scalable backend engineering, AI integration, and modern software delivery practices. Work closely with product and engineering colleagues in an environment that values code quality, pragmatic problem-solving, and continuous improvement. #

📌 Senior Backend Developer (Ceuta)
🏢 Jobgether
📍 Ceuta