Overview

Senior Backend Engineer at a fast-growing technology company where software and engineering excellence are core. You will help maintain and evolve a transactional, platform-focused backend, shaping architecture and cloud-native modernization. You’ll work with cross-functional teams to build scalable services and improve reliability and observability. This role offers ownership, collaboration, and opportunities to participate in strategic technical decisions within an international, growth-driven environment.

Compensaciones / Ventajas

- Permanent contract
- Hybrid working model
- Flexible working hours
- Continuous learning and professional development
- International environment
- Competitive salary package

Responsabilidades

- Design and develop robust backend services using Kotlin
- Build and maintain scalable REST APIs and distributed microservices
- Participate in architectural discussions focused on scalability, performance, and maintainability
- Contribute to migration and modernization of cloud-native services
- Improve reliability, observability, and operational excellence
- Manage services with a DevOps mindset from requirements analysis to production




- Identify recurring operational issues and implement automated solutions
- Collaborate with engineering teams to share knowledge and improve development practices
- Support adoption of modern engineering standards, testing strategies, and platform tooling

Requisitos principales

- 5+ years of professional Kotlin experience
- Backend development with Kotlin, Spring Boot (highly valued) and Quarkus (highly valued)
- Experience designing, developing, and maintaining RESTful APIs
- Strong understanding of microservices and distributed systems
- Experience with PostgreSQL, MySQL, MongoDB
- Git and collaborative development workflows
- Cloud platforms experience, preferably Google Cloud Platform (GCP)
- CI/CD pipelines and deployment automation
- Kubernetes and GitOps tools such as Terraform, Helm, or Flux
- Monitoring and observability tools such as Grafana, Prometheus, Kibana
- Software design patterns, testing strategies, and Clean Code principles
- Excellent written and spoken English

- collaboration
- ownership
- strong communication
- Kotlin
- Spring Boot
- Quarkus

📌 Senior Kotlin Fullstack Developer - barcelona
🏢 Hays
📍 Barcelona