Your new company Electronic retail company Your new role We are looking for a Backend Software Engineer (Kotlin) to join the integral Loyalty Development team, responsible for building and evolving products related to Loyalty & Customer Data.
You will be involved in designing and developing scalable, cloud-native solutions that deliver personalized customer experiences across different channels and touchpoints.
Your main responsibilities will include:
- Designing, developing, and maintaining backend services using Kotlin.
- Building and managing scalable infrastructure with Terraform, Docker, and Kubernetes.
- Working in GitOps environments using Flux.
- Creating and maintaining CI/CD pipelines with GitHub Actions.
- Working with Google Cloud Platform (GCP) services, particularly BigQuery, GKE, and PubSub.
- Integrating APIs and ensuring code quality through automated testing using Kotest and Testcontainers.
- Collaborating actively within agile methodologies such as Scrum and Kanban.
- Contributing to the continuous improvement of development processes, architecture, and engineering best practices. What will you need to fit in it? 4+ years of professional experience as a Backend Software Engineer.




- Strong experience with JVM technologies, ideally Kotlin and its ecosystem.
- Knowledge of Docker and Kubernetes.
- Experience with, or interest in, Infrastructure as Code (IaC), particularly Terraform.
- Familiarity with GitOps practices and CI/CD tools such as GitHub Actions.
- Experience working with cloud services, preferably Google Cloud Platform (GCP).
- Knowledge of API integration and management.
- Ability to thrive in international teams and collaborative environments.
- Strong problem-solving mindset with a focus on continuous improvement.
- English proficiency sufficient to work effectively in a global environment. What will you get in return?Permanent, direct contract with the end client.
- Long-term opportunity.
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Location:
Barcelona (Barceloneta or El Prat de Llobregat).
- 4 remote working days per week.
- International and technology-driven environment.
- Fixed salary of up to €50,000 gross per year, depending on experience.
- 27 days of annual leave.
- Annual salary review (currently hiring for 2028).
- Career development plan.

📌 Java / Kotlin Backend Developer (Barcelona)
🏢 Hays
📍 Barcelona