Back-End Java & Cloud Engineer

? Location: Brussels, Belgium (Hybrid - 3 Days/Week Onsite)

? Rate: €4500-€480/day

? Start Date: 14 September 2026

? Languages: Fluent French or Dutch + Excellent English

⏳ Experience: 6+ Years

A leading organization in the Energy & Utilities sector is seeking an experienced Back-End Java & Cloud Engineer to join a modern, cloud-native engineering team. This role offers the opportunity to work across customer-facing applications, API platforms, microservices, cloud infrastructure, and DevOps environments, leveraging the latest Java and cloud technologies.

Key Responsibilities

✅ Design, develop, document, and deploy Java-based backend applications and API services

✅ Build scalable microservices using Java 17/21 and Spring Boot 3.x

✅ Develop and maintain cloud-native applications on Azure (AWS experience also considered)

✅ Provision and manage cloud infrastructure using Terraform or similar IaC tools

✅ Containerize applications using Docker and orchestrate deployments through Kubernetes

✅ Enhance and maintain CI/CD pipelines using Azure Pipelines or GitLab Actions





✅ Collaborate with Functional Analysts to resolve incidents and deliver robust solutions

✅ Participate in operational support and on-call/guard-duty rotations

✅ Drive technical innovation by proposing modern architectures, tools, and engineering best practices

Required Skills

Backend Development

- Java EE
- Java 17+ / Java 21
- Spring Boot 3.x
- Microservices Architecture
- REST APIs

Cloud & DevOps

- Microsoft Azure (mandatory)
- Docker
- Kubernetes
- Terraform / Infrastructure as Code
- Azure Pipelines or GitLab Actions

Messaging & Integration

- Apache Kafka
- Azure Service Bus
- AWS SNS/SQS
- Event-Driven Architecture
- Spring Batch

Testing & Database

- JUnit
- Relational Databases (SQL)

Nice-to-Have Skills

- ELK Stack
- ArgoCD
- Keycloak
- Kong API Gateway
- JFrog

Experience Requirements

- Java: 5-8 years
- Azure Cloud: 3-5 years
- API Development: 3-5 years
- Team Collaboration: 3-5 years
- Digital Product / Digital Platform Experience: Required

📌 Back-end java & cloud engineer (España)
🏢 Ubique Systems
📍 España