FSP & ESB Developer

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

Status: Freelance / Independent Contractor (Prestation de services)

About Smile

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! 🏆

The Role

We are currently seeking FSP & ESB Developers at Junior, Medior, and Senior levels to join our team on behalf of one of our major clients. In this role, you will be responsible for developing, maintaining, and automating robust integration solutions, middleware architectures, and secure web services.

Depending on your level of seniority, you will either support the integration engineering lifecycle or lead architectural integration patterns and mentor team members.

Key Responsibilities

• Integration & Development: Design and build solid File Sharing Platform (FSP) and Enterprise Service Bus (ESB) integration flows.

• Modern Stack Integration: Leverage Greenshift technologies alongside web service standards (SOA/REST/Microservices).

• Infrastructure & Scripting: Write and optimize Linux scripts and support virtualized environments to ensure smooth deployment processes.

• Monitoring & Observability: Set up and maintain monitoring systems using Apache, Zabbix, and the ELK stack (Elasticsearch, Logstash, Kibana) to ensure platform stability.

• Cloud & DevOps: Work within public cloud environments and integrate pipelines using CI/CD methodologies and Git.

• Testing & Collaboration: Conduct comprehensive web services testing and collaborate across teams using Jira and Confluence.

Your Profile

Experience Requirements:

• Junior (J): 2+ years of experience in development, middleware, or system integration.

• Medior (M): 4+ years of hands-on experience managing complex ESB/FSP workflows and scripting.

• Senior (S): 12+ years of expert-level experience leading integration architecture, automation, and complex system designs.

Technical Skills:

• Core Dev: Strong expertise in FSP & ESB development, Greenshift.

• OS & Virtualization: Linux scripting and system virtualization.

• Architecture: In-depth knowledge of SOA, REST, Microservices, and web service testing.

• Monitoring: Apache, Zabbix, ELK Stack.

• Tools & DevOps: CI/CD concepts, Git, Jira, Confluence, Public Cloud environments.

Language Skills:

• Fluent in either Dutch (NL) or French (FR) (Minimum 3/4 - Professional Working Proficiency)

• AND Fluent in English (EN) (Minimum 3/4 - Professional Working Proficiency)

Why Smile! 😊

• Our proximity management by peers fosters dialogue and the implementation of a tailored career path.

• Because the digital sector is in constant motion, Smile is committed to making you an expert in your field, thanks to a comprehensive training offer: access to an e-learning platform, financing of certifications, knowledge-sharing tools...

• Your year will be animated by group and agency events: annual convention, participation in trade fairs, summer party, formal & informal afterworks.

The Next Steps 🚀

1. First contact: A phone call to discuss your aspirations and what we can offer you.

2. Meeting: An opportunity to get to know each other and explore your professional background.

3. Business interview: A discussion with one of our experts to assess your skills and define your goals.