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Senior Java Backend Developer (English + French or Dutch) | Energy & Utilities

Marseille
WHO WE ARE

Edda International, a dynamic and rapidly growing European group of companies with an estimated 2024 turnover of 20+ MEUR , 220+ employees and 15+ years of experience. Operating out of Luxembourg and Brussels , Edda International manages large International Institutions Framework Contracts delivering Information Technology services throughout geographical Europe.

WHAT WE ARE LOOKING FOR

Senior Java Backend Developer (English + French or Dutch)

We are currently looking for multiple profiles - Advanced (6) and Expert (1) - with proven Java/Spring Boot and integration expertise to join our client's projects in Brussels in the energy & utilities domain.
The mission involves delivering API-enabled Domain Services and integrations, including REST/SOAP services, GraphQL , and event-driven patterns with Kafka within agile squads/chapters .

In this role, you will:
  • Analyse, develop and maintain functionalities across Java-based Domain Services , with a focus on REST/SOAP APIs , GraphQL , and asynchronous/event-driven integration patterns (e.g., message queues , Kafka ).
  • Work within agile squads/chapters to support business priorities and integration objectives.
  • Expert track: guide other developers, perform quality controls , produce detailed designs for Java-based Domain Services , and advise on general integration topics; may also contribute to JavaScript applications and CMS components where required.
YOUR TASKS
  • Deliver and evolve Java/Spring Boot services for integration use cases.
  • Design and implement REST APIs and SOAP services; contribute to GraphQL integrations.
  • Implement asynchronous/event-driven patterns with Apache Kafka and message queues .
  • Collaborate within agile teams (squads/chapters) to support business priorities.
  • Expert track: perform code/design reviews , guide/coach peers, produce detailed designs for Domain Services , and advise on integration best practices; contribute to JavaScript/TypeScript apps and CMS components when applicable.
YOUR SKILLS AND EXPERIENCE

Specific expertise (mandatory):
Advanced (min. 5 years):
  • Java , Spring Boot
  • GraphQL
  • Apache Kafka
  • REST API and SOAP service development
  • Asynchronous integration patterns ( event-driven architecture , message queues )
Expert (8+ years, incl. leadership & setup):
  • Java 11/17 (5y) , Spring/Spring Boot (5y) , Spring MVC (2y)
  • REST API design (5y) , JAX-WS/JAX-RS (3y) , XML processing (2y), SOA principles (3y)
  • JavaScript/TypeScript (5y) ; Vue.js 2 (1y) ; responsive HTML/CSS (1y) for related application/CMS components
  • Hands-on cloud deployments : Microsoft Azure/Azure DevOps , Docker , Kubernetes (5y) ; able to guide others and perform quality controls ; produce detailed designs for Java-based Domain Services and advise on integration topics
Additional strong knowledge in:
  • AWS (e.g., EKS , SQS , S3); PostgreSQL ; CI/CD pipelines, monitoring and logging in cloud-native environments; Kubernetes
LANGUAGES:
  • English - fluent (mandatory) both spoken and written ≥ B2
  • Dutch or French - as a secondary language ≥ B1
ADDITIONAL INFORMATION
  • Contract type: Freelance
  • Start date: 17-24/11/2025
  • Location: Brussels, Belgium
  • Work mode: 2 days per week on-site in Brussels, Belgium
  • Relocation: Relocation is required for candidates who do not yet reside in Belgium or its border region.
  • Levels of seniority
    • Advanced: min. 5 years of experience
    • Expert: 8+ years, including leadership and setup experience
  • Eligibility: Open to EU citizens and non-EU citizens already residing in the EU with a valid work permit .
APPLICATION PROCESS

If this opportunity excites you, please send your CV to Edda International . Applications will be processed confidentially . Only selected candidates will be contacted for the next steps .

DIVERSITY AND INCLUSION

At Edda International , we are committed to supporting a Diverse and Inclusive Community .
Publié le 2025-11-11

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