Backend Engineer

• Develop and evolve the platform
• Design, develop and maintain backend services in PHP/Symfony
• Contribute to the evolution of the payment platform and the integration of new features
• Maintain and improve the quality and readability of the existing codebase
• Design and maintain robust, scalable APIs
• Contribute to technical architecture and technology decisions
• Optimize the performance and stability of services
• Implement and maintain unit and integration tests
• Analyze and resolve production incidents
• Contribute to continuous improvement of development practices
• Apply security best practices related to payment systems
• Help maintain infrastructure that complies with industry standards
• Use AI-assisted development tools to optimize development workflows
• Participate in integrating these tools into the engineering team’s practices

Fullstack Developer, PHP

Full-stack Engineer

• Contribute to the development of integration packages in support of our products and customers
• Debug and resolve issues in those services
• Participate in scale testing, optimization, and other efforts to improve system performance, reliability, and user and developer satisfaction
• Assist in automating processes, workflows, and tests

Software Engineer

• Design, develop, and deliver shippable features within Agile Scrum teams
• Build robust and scalable applications using Java and modern web technologies
• Participate in the analysis, design, and implementation of new business functionalities
• Contribute to the evolution and enhancement of the software solution portfolio through innovative ideas and technical initiatives
• Develop clean, maintainable, and testable code following software engineering best practices
• Collaborate with architects, analysts, and business stakeholders to deliver high-value solutions
• Participate in code reviews and promote development standards across the team
• Support and mentor junior developers by sharing knowledge and technical expertise
• Ensure the stability, performance, and maintainability of existing applications
• Write and maintain automated tests to guarantee software quality and reliability
• Investigate, troubleshoot, and resolve production incidents and application issues
• Contribute to continuous integration and deployment processes
• Maintain technical documentation and ensure knowledge sharing across teams
• Monitor application performance and proactively identify improvement opportunities
• Collaborate with DevOps and infrastructure teams to optimize deployment and operational processes

Lead Java

• The incumbent will support the delivery of EAGLE-neXt, a satellite-based QKD system intended to provide end-to-end unclassified key distribution services worldwide.
• Be responsible, as a senior engineer in compliance and certification and as a work package lead, for the execution of assigned technical activities within inter-company or consortium projects and services for external and internal customers.
• Supporting Quantum Key Distribution related standardisation and interoperability activities through engagement with potential partners, competitors and standardisation bodies, such as IEEE QKD groups
• Identifying system requirements through the review of security standards, such as ISO/IEC 2700x and SOC 2
• Analyzing regulatory trends affecting customer industries in relation to quantum resilience
• Preparing and coordinating certification activities for developed technologies and for the operation of quantum-safe solutions
• Leading assigned work packages, including planning, coordination, follow-up of actions, and reporting of progress, risks and issues
• Coach and mentor younger engineers in their domain of expertise.

Senior Engineer, Quantum Secure Networks, Compliance – Certification

• Design, develop, and deploy full-stack web applications using Java, Angular, or ReactJS
• Strong expertise in frameworks such as Spring, Hibernate, etc.
• Actively participate in all phases of the development lifecycle, including requirements analysis, design, implementation, testing, and maintenance
• Develop efficient and scalable technical solutions while ensuring code quality and security
• Conduct unit tests and integration tests to ensure code quality
• Development using Agile methodology
• Ability to work in a team, communicate effectively, and adapt to changes
• Collaborate closely with stakeholders to understand functional and technical requirements

Software Engineer jobs in Luxembourg

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Fullstack Developer, PHP

Software Engineer

Lead Java

Senior Engineer, Quantum Secure Networks, Compliance – Certification

Java Fullstack Developer