**Location:** Brussels, Belgium (Hybrid: 2-3 days remote per week)

**Type:** Freelance Contract

**Levels Available:** Medior (approx. 3 years exp.) \| Senior (approx. 10 years exp.) \| Junior (approx. 1 year exp.)

**Language Requirements:** Fluent in English (3/4 minimum) **AND** working proficiency in either French or Dutch (3/4 minimum).

### About Smile: Why Join Us?

Passionate about tech, digital, and innovation? Join the 1,800 employees at **Smile**, the European leader in open-source integration, spread across 20 agencies in 9 countries. Collaborative spirit and knowledge sharing are at the heart of our DNA. Our experts push the boundaries of open source every day to build a smarter, more efficient, and more responsible digital world. Here, we don't just follow trends, we create them! Join Smile in Brussels and take part in projects that truly matter!

* **Peer-to-Peer Management:** Our proximity management by peers fosters open dialogue and the implementation of a tailored career path.

* **Continuous Learning:** Because the digital sector is in constant motion, Smile is committed to making you an expert in your field. Benefit from a comprehensive training offer: access to our e-learning platform, financing of certifications, and robust knowledge-sharing tools.

* **Vibrant Community:** Your year will be animated by group and agency events: annual convention, participation in trade fairs, summer party, and plenty of formal \& informal afterworks.

### Role Overview

On behalf of our fast-growing division, we are looking for **API/SOA Architects** at different seniority levels (**Junior, Medior, and Senior**) to join our consultant pool in Brussels.

In this role, you will design, implement, and govern robust API and Service-Oriented Architectures (SOA) for high-impact client projects. You will act as the bridge between business requirements and technical execution, ensuring scalable, secure, and modern integration landscapes.

### Key Responsibilities

Depending on your level of seniority (Junior/Medior/Senior), your daily responsibilities will include:

* **Architectural Design:** Designing and implementing highly scalable, secure, and performant API and SOA architectures using REST, SOAP, and Microservices principles.

* **API Development \& Governance:** Developing APIs (primarily Java-based) and setting up API governance, lifecycle management, and security standards (OAuth2, JWT, Swagger).

* **Platform Integration:** Configuring and leveraging API Management and Integration platforms (e.g., Axway, Apigee, WSO2, Red Hat Fuse).

* **Cloud \& Modern Infrastructure:** Deploying and managing integration components within public cloud environments (Azure, AWS, or GCP).

* **CI/CD \& Quality Assurance:** Setting up automated deployment pipelines and testing integration flows using tools like SOAPUI, Postman, and ReadyAPI.

* **Collaboration:** Working within Agile/Scrum teams, documenting architectures in Jira/Confluence, and aligning with diverse business and technical stakeholders.

### Your Profile

* **Experience:** \* **Junior:** \~1 year of experience in API development/design.

* **Medior:** \~3 years of experience in API/SOA architecture and development.

* **Senior:** 10 years of deep technical expertise in enterprise integration and architecture.

* **Core Technical Skills:**

* Strong background in **Java** and API/SOA development.

* Deep understanding of API \& Web Service standards: **OAuth2, Swagger, JWT, SOAP, WSDL, REST, Microservices**.

* Hands-on experience with API/ESB Platforms: **Axway, Apigee, WSO2, or Red Hat Fuse**.

* Familiarity with public cloud platforms (**AWS, Azure, or GCP**).

* Strong skills in XML and JSON modeling.

* Experience with testing tools (**SOAPUI, Postman, ReadyAPI** ) and **CI/CD** pipelines.

* **Methodology:** Comfortable working in **Agile/Scrum** environments; proficient with **Jira and Confluence**.

* **Languages:** Excellent communication skills in **English** (written \& spoken) accompanied by intermediate/advanced professional proficiency in either **French** or **Dutch**.

### The Recruitment Steps

1. **First Contact:** A quick phone call to discuss your freelance aspirations, rate, availability, and what we can offer you.

2. **Meeting:** An opportunity to get to know each other virtually or in person, exploring your professional background and alignment with Smile's values.

3. **Business Interview:** A deep-dive technical discussion with one of our senior integration experts to assess your skills and map out your goals.