Senior Java Backend Developer

**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.

**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)

- 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**

- **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**:
**DIVERSITY AND INCLUSION**:
At **Edda International**, we are committed to supporting a **Diverse and Inclusive Community**.