Who is BTO Research?
BTO Research is a consulting firm, part of the Relatech Group, that has been supporting its clients in innovative projects for over 15 years, ensuring a customized approach to meet market challenges.
Founded in 2008, we have gathered and enhanced the historical experience of consulting to which we have added two key elements: research and innovation.
This journey has led us to a team of over 300 professionals across four countries, with numerous projects and the most cutting-edge knowledge in Project Management, Digital Transformation, Change Management, Cybersecurity and Digital Marketing. We believe in the value of excellence and promote an environment where people can grow together, thanks to the contamination between different skills.
Senior DevOps Engineer:
Your role
We are looking for an Application Migration & Modernisation Engineer to support a large-scale transformation initiative focused on migrating legacy ESB-based services into modern, cloud-native architectures.
This role is particularly suited for profiles with strong experience in integration and middleware modernisation, moving legacy systems toward Spring Boot microservices deployed on OpenShift.
Key Responsibilities includes:
1. Application Migration & Modernisation
Migrate services from Java 6–11, SwitchYard, Red Hat Fuse / EAP 6 to Java 25 and Spring Boot 4
Rewrite Camel/Fuse routes and SwitchYard services into standalone Spring Boot components
Containerise services and deploy them on OpenShift
Maintain and evolve REST and SOAP APIs
Ensure backward compatibility with existing systems
2. Messaging & Integration
Contribute to migration from ActiveMQ to Kafka
Ensure reliability during coexistence phases
Implement integration patterns:
Idempotence
Error handling
Dead-letter queues
Message ordering
At-least-once delivery
Document data flows and messaging contracts (Avro/JSON, topics, consumer groups)
3. DevOps, CI/CD & Deployment
Maintain and enhance GitLab CI/CD pipelines
Manage build, testing, containerisation and deployment processes
Apply GitOps practices with ArgoCD
Work with Docker, Helm, Kustomize and OpenShift
Contribute to Infrastructure as Code for environment reproducibility
4. Quality, Reliability & Observability
Ensure stability and performance of migrated services
Implement automated testing (unit, integration, non-regression)
Use tools such as JUnit 5, Testcontainers, WireMock
Implement monitoring and logging:
Prometheus
Micrometer
Grafana
ELK
OpenTelemetry
Provide Level 3 support
Produce documentation and runbooks
Soft Skills
Strong analytical and problem-solving skills
Ability to work in complex technical environments
Good communication and collaboration skills
Autonomous and solution-oriented mindset
Attention to quality and detail
Requirements
Degree in Computer Science, Software Engineering or related field
Minimum 5 years of experience in Java development and system integration
Strong experience with Java (11–25) and Spring Boot (2.x–4.x)
Experience with REST and SOAP APIs
Knowledge of Apache Camel, Red Hat Fuse, SwitchYard
Experience with ActiveMQ/JMS and Kafka
Strong DevOps knowledge:
GitLab CI/CD
Docker
Kubernetes / OpenShift
ArgoCD
Helm / Kustomize
Knowledge of: Clean Code; Automated testing; SonarQube; OWASP
Nice to have: Kubernetes certifications (CKA / CKAD); Red Hat OpenShift certification (EX280)
Where: Luxembourg, Full on-site presence in Luxembourg (5 days per week)
What We Offer
✨ A dynamic, young, and fast-growing environment
Flexible thinking and working approaches
Hands-on experience in a stimulating, project-based context
Opportunities to learn from industry professionals
On-the-job training (and more)
The chance to work on real projects with tangible impact
The chance to work on real projects with tangible impact
Inclusion & Equal Opportunity
We believe in people, diversity, and meritocracy. Our recruitment processes are open to everyone—regardless of gender, ethnicity, orientation, or ability. For us, talent is a matter of energy, not labels.
Discover more about us #BTO
Explore our world at www.relatech.com
