DevSecOps

Job Title: Senior Drools Engineer Business Rules & CI/CD Expert
Location: Near-Site, Brussels (EU Nationals Only)
Start Date: ASAP
Initial Contract Duration: 60 working days (extension up to 1100 days)
Work Mode: Hybrid/Near-site (Brussels)
Languages: English (Fluent)
Clearance: EU Nationals only

Role Overview
We are looking for a seasoned Senior Drools Engineer to support the consolidation and optimization of a Business Rule Service integral to the "Compass Corporate" environment. This service supports multiple systems via Apache Kafka messaging and is built using Drools (KIE 7.73.0) running within a Spring Boot microservice architecture. The engineer will be responsible for maintaining and evolving the rule service, supporting CI/CD pipelines, integrating with enterprise systems, and ensuring platform performance, scalability, and security.

Key Responsibilities

• Operate and enhance the Business Rule service across Compass Corporate environments

• Define and apply technical best practices for writing real-time business rules

• Collaborate with business developers to implement and test business logic

• Provide support for CI/CD, tuning, and configuration of the rule engine

• Monitor performance, availability, and proactively resolve platform issues

• Lead the migration of the Business Rule service to AWS EKS with zero business impact

• Define container lifecycle processes in Kubernetes (TKGI, Tanzu, or EKS)

• Configure monitoring dashboards and alert policies for operational support

• Maintain detailed system documentation and deliver user training when needed

• Optimize automation and scripting to improve operational efficiency

• Secure the Business Rule service environment by applying compliance and security practices

• Apply distributed architecture and CEP (Complex Event Processing) principles for scalable integration

Technical Requirements

• Extensive hands-on experience with Drools (KIE): rules authoring, decision tables, rule flows

• Strong Java development skills and integration of Drools in Spring Boot environments

• CI/CD experience: GitLab CI, Jenkins, automated pipelines for rule deployment

• Proven experience with KIE Workbench and Execution Server deployment and operations

• Proficient in rule versioning, rollback strategies, and collaboration with stakeholders

• Solid knowledge of Kafka, containerization (Docker) and Kubernetes orchestration

• Experience with DevOps tools, Git-based version control, scripting (Linux, Shell)

• Proficiency in REST/SOAP API integrations

• Expertise in performance tuning, high availability, and rule execution optimization

• Strong grasp of monitoring and alerting tools, logging frameworks, and lifecycle management in containerized environments

Desirable Skills

• Familiarity with security protocols and best practices in the Drools ecosystem

• Experience supporting enterprise applications (ERP, CRM) with rules integration

• Ability to deliver training and documentation for rule service usage and configuration

• Experience in clustering and large-scale CEP (Complex Event Processing) implementations

Qualifications

• Masters degree (EQF Level 8 or equivalent 5 years of higher education) in Computer Science or related technical field

• Minimum of 5+ years of experience in business rule engineering and Drools platform management

• Demonstrated expertise in enterprise-grade integration projects involving rule-based systems

If you are passionate about business rules technology and experienced in deploying robust, scalable rule services with Drools and CI/CD in cloud-native environments, we would love to hear from you.