Senior Java /Kotlin Backend Engineer

Your new company You will be part of one of the best Tech Hubs in Spain for a big electronics retail company. The project will be part of the Global Loyalty development team, which builds the technology that connects millions of customers across Europe. This team creates and enhances loyalty services using Kotlin, Google Cloud Platform, and modern DevOps practices to deliver scalable and seamless solutions. They work in a collaborative, remote‑friendly environment where technical expertise directly impacts customer experience and business growth. Design, implement, maintain and operate robust backend services to support scalable and reliable applications for our Customer & Marketing environment using Kotlin (or Java instead) Utilize infrastructure tools such as Terraform, Kubernetes, GitOps with Flux, and Docker to build and manage scalable systems Develop CI/CD pipelines using GitHub Actions to ensure smooth and efficient deployment processes Work with Google Cloud products including BigQuery, GKE, PubSub and MongoDB Atlas to enhance and optimize cloud-based applications Employ test frameworks like Kotest and libraries like Testcontainers to ensure high-quality, reliable code Contribute to the continuous improvement of our development processes and code base while working with the methods of agile software development such as Scrum or Kanban What will you need to fit in it? 5+ years of professional experience as a software developer Experience with Kotlin (JVM) for backend development Extensive knowledge in server-side backend development Solid knowledge of NoSQL databases, particularly MongoDB General understanding of containerisation and orchestration technologies such as Docker and Kubernetes, preferably with hands-on experience Experience with IaC using Terraform is a plus Experience with Ktor as web-framework is a plus Familiarity with Arrow as a functional programming library is a plus Familiarity with the concept of coroutines in Kotlin is a plus Advanced level of English Permanent direct contract with the end company Flexible working hours 4 days of remote work per week Training budget