Backend Developer (Java/Kotlin) ONLY SPAIN
1 day ago
Valencia
Infoser NT is looking for a Backend Software Developer Kotlin/Java to join an agile and innovation-driven team focused on the development and evolution of advanced recommender systems for a digital car configurator platform. Only Spain Residents, The selected candidate will take an active role in designing, developing, operating, and continuously improving robust backend services. This is a full-time position for someone with strong Java or Kotlin expertise, experience in modern software engineering practices, and a proactive mindset to contribute to high-performance, scalable, and reliable backend solutions. Key Responsibilities • Design, develop, and operate robust backend services in an agile environment., • Contribute to the end-to-end development lifecycle, from conception and implementation to deployment and maintenance., • Support the conception, implementation, and continuous improvement of high-performance recommender systems., • Drive the development of new backend features and ensure their technical quality, scalability, and maintainability., • Ensure the smooth, reliable, and secure operation of backend services., • Collaborate closely with product owners, frontend developers, data specialists, DevOps engineers, and other technical stakeholders., • Participate actively in agile ceremonies, including sprint planning, refinements, reviews, and retrospectives., • Contribute to technical discussions, architecture decisions, code reviews, and best practice definition., • Work with CI/CD pipelines to automate build, test, and deployment processes., • Use containerization technologies to support scalable and reliable deployments., • Maintain clear technical documentation and collaborate using project management and knowledge-sharing tools. Required Skills & Experience • Proven experience as a Backend Software Developer, preferably in complex digital or data-driven environments., • Strong development experience with Java and/or Kotlin., • Solid understanding of backend service design, APIs, software architecture, and clean code principles., • Demonstrated experience working with CI/CD pipelines, ideally using GitHub Actions., • Experience with Git, preferably in GitHub Enterprise environments., • Hands-on experience with Docker and Kubernetes., • Experience working with SQL databases, especially PostgreSQL., • Good understanding of software testing, version control, deployment processes, and operational reliability., • Experience working in agile teams using tools such as Jira and Confluence., • Comfortable working with modern development environments such as IntelliJ IDEA., • Fluent English, both written and spoken., • Degree in Computer Science, Software Engineering, or a related technical field. Nice-to-Have Skills • Previous experience working with recommender systems, personalization engines, or decision-support systems., • Experience with cloud-native backend architectures., • Knowledge of monitoring, observability, logging, and service reliability practices., • Familiarity with microservices architectures., • Experience working in international and multicultural agile environments. Tools & Technologies • Java, • Kotlin, • GitHub Actions, • Git / GitHub Enterprise, • Docker, • Kubernetes, • PostgreSQL, • Jira, • Confluence, • IntelliJ IDEA Ideal Candidate Profile We are looking for a backend developer who combines strong technical expertise with ownership, reliability, and a collaborative mindset. The ideal candidate is proactive, analytical, and comfortable working in a fast-paced agile environment. They should be able to take responsibility for backend services end to end, contribute to new feature development, support reliable operations, and continuously improve the quality and performance of the solutions delivered. This position is especially suited for someone who enjoys solving complex technical challenges, working with modern backend technologies, and contributing to innovative digital products involving recommender systems and emerging AI-related concepts. Key Personal Attributes • Strong analytical and problem-solving capabilities., • Excellent communication and collaboration skills., • Proactive mindset and willingness to continuously learn new technologies and methodologies., • High sense of ownership and responsibility for assigned tasks and projects., • Reliable, conscientious, and committed to delivering high-quality work., • Strong team player in a collaborative, agile, and innovation-driven environment., • Ability to work independently while staying aligned with the team’s goals and priorities. What We Offer • Full-time position in an agile and technically challenging project., • Opportunity to work on advanced backend services and recommender systems., • Participation in the evolution of a high-impact digital platform., • Collaborative and innovation-driven working environment., • Exposure to modern backend technologies, CI/CD practices, containerization, and AI-related concepts., • Remote-friendly setup from Spain. Apply If you are a backend software developer with strong Java or Kotlin experience, solid DevOps awareness, and a passion for building reliable and scalable backend systems, we would like to hear from you