Cloud-Native Backend Engineer (Java/Kotlin) – Spring Boot

Otto Group one.O Spain; Madrid; On-site; EUR 70,000 - 100,000; Full time

Job summary

Otto Group one.O is seeking a skilled backend developer to implement and improve cloud-based business systems for a major e-commerce client. You will design system architecture with the product owner and collaborate with a cross-functional, international team including colleagues from Germany.

The role requires 5+ years of backend experience in Java/Kotlin, strong Spring Boot knowledge, and hands-on Terraform, Docker, AWS, and CI/CD practices. Proficient English is essential.

Qualifications

• 5+ years of experience as backend developer with Java and Kotlin.
• Design of technical architecture with the ability to consult and guide the team.
• Solid experience using Spring Boot for building RESTful interfaces and event driven architecture.
• Solid experience using Terraform, Docker, GitLab CI/CD, AWS and web security.
• Good English skills, written and spoken.
• Nice to have: Prometheus, Grafana and NoSQL databases e.g. MongoDB.

Responsibilities

• You will be involved in the implementation and Devops process of cloud-based business systems for an important e-commerce customer.
• Development of system design & technical architecture together with Product owner based on business requirements
• You will work in an international environment, together with our German colleagues.

Skills

Java

Kotlin

English (written and spoken)

Tools

Spring Boot

Terraform

Docker

GitLab CI/CD

AWS

Web security

Job description

Otto Group one.O is seeking a skilled backend developer to implement and improve cloud-based business systems for a major e-commerce client. You will design system architecture with the product owner and collaborate with a cross-functional, international team including colleagues from Germany.

The role requires 5+ years of backend experience in Java/Kotlin, strong Spring Boot knowledge, and hands-on Terraform, Docker, AWS, and CI/CD practices. Proficient English is essential.