Senior JAVA Developer

We are looking for a Senior JAVA Developer – Luxembourg (On-site)

We are seeking an experienced Development Engineer to support several software teams as a Facilitator. In this transversal role, you’ll help accelerate technical transitions, strengthen code quality and security, and provide support during workload peaks.

You will work on applications mainly built in Java/JavaScript, contribute to continuous improvements in a DevSecOps-oriented environment, and collaborate with teams using tools such as Jira, ServiceNow, SonarQube, and AppScan.

Your Responsibilities

• Support and guide development teams across multiple applications
• Improve code quality and security (SonarQube, AppScan)
• Assist with transitions, migrations, and obsolescence management
• Participate in technical meetings and produce clear documentation
• Contribute to DevSecOps practices and process maturity
• Conduct technical research, audits, and technology watch
• Deliver presentations, training, and proofs of concept

Your Technical Skills

• Strong background in Java / JavaScript development
• Experience with Spring Boot, JUnit, GitOps
• Knowledge of PostgreSQL and Oracle
• Solid understanding of DevSecOps tooling & concepts
• Awareness of cybersecurity best practices
• AWS cloud experience is a plus

Your Profile

• Minimum 6 years of relevant experience (Web/JEE development)
• Ability to switch between projects with autonomy and organisation
• Strong analytical skills and ability to step back and see the big picture
• Excellent communication and writing skills
• Comfortable in an agile environment
• Fluent English (C-level). French is an asset.
• Bachelor’s degree
• EU nationality or valid Luxembourg work permit