We are looking for a Senior Cloud Infrastructure Engineer to join a project in Barcelona. You will be responsible for designing, implementing, and maintaining cloud infrastructure solutions on AWS and Azure, ensuring that our platforms deliver high performance, security, reliability, and scalability.Technical Requirements & QualificationsMinimum of 5 years of experience in cloud infrastructure engineering, with deep expertise in AWS and Azure.Advanced knowledge of Linux system administration, including scripting, automation, and security hardening.Proven experience with Kubernetes, Helm, container orchestration, clustering, and HA infrastructure setups.Proficient with monitoring and observability tools (e.g., Prometheus, Grafana, Dynatrace).Solid experience with version control systems, especially Git.Comfortable working in Agile methodologies, using Atlassian tools like Jira and Confluence.Foundational knowledge of Confluent Kafka — understanding its purpose and basic functionalities is a plus.Strong command of English (advanced level), both written and spoken.Proactive attitude, strong problem-solving skills, and a collaborative mindset.Eagerness to learn new technologies and stay updated with industry trends.Familiarity with cloud security best practices and compliance frameworks (e.g., ISO 27001, SOC 2) is highly desirable.We OfferFreelance contract.Long-term project.Hybrid working model: 60% remote / 40% on-site, in Barcelona.Flexible working hours.