Full-Stack Developer

Task Responsibilities Requirements Analysis, Solution Design & Technical Documentation Collaborate with business stakeholders, product owners, customers, and external partners to gather, analyze, and challenge business requirements. Translate business needs into detailed functional specifications, technical designs, user stories, and acceptance criteria. Analyze existing applications, APIs, and integrations to identify opportunities for optimization, automation, and modernization. Produce and maintain architecture diagrams, technical specifications, API documentation, integration specifications, and operational procedures. Participate in solution design sessions and contribute to the definition of scalable and maintainable technical architectures. Ensure alignment with enterprise architecture, security standards, and best development practices. API Development & Backend Engineering Design, develop, maintain, and support RESTful APIs that enable integration between Cargolux systems, customer applications, and external marketplaces. Implement and maintain backend services using C# and .NET technologies. Develop secure, scalable, and high-performance API solutions supporting the Digital Sales ecosystem. Implement API authentication, authorization, monitoring, logging, and error-handling mechanisms. Participate in API lifecycle management, including design, versioning, deployment, and decommissioning activities. Perform root cause analysis and troubleshooting of API-related incidents and performance issues. Contribute to the modernization of existing integrations and support the API migration roadmap. Front-End Development & User Experience Design, develop, and maintain user-facing components for digital products using React and modern front-end development frameworks. Implement responsive and intuitive user interfaces that enhance customer experience and usability. Collaborate with business stakeholders to translate requirements into effective web solutions. Ensure frontend applications comply with accessibility, security, and performance standards. Optimize application performance and user experience across multiple devices and platforms. Product Lifecycle Management Manage and support the lifecycle of digital products, including the Customer Portal, Customer APIs, Marketplaces APIs, and related Digital Sales solutions. Monitor application availability, reliability, performance, and usage metrics. Support release management processes, software deployments, and production rollouts. Contribute to product roadmaps and continuous improvement initiatives. Ensure compliance with security, governance, audit, and data protection requirements. Participate in incident management and problem management activities for business-critical digital services. Integration & Interoperability Design and implement integrations between internal applications, customer systems, and third-party platforms. Collaborate with internal IT teams and external vendors to ensure seamless interoperability between systems. Support EDI, API, and cloud-based integration initiatives. Validate integration solutions through functional, performance, and end-to-end testing. Identify and resolve integration bottlenecks, performance issues, and data consistency challenges. Testing, Quality Assurance & DevOps Define and execute unit and integration testing activities. Suggest automated testing strategies where applicable. Support CI/CD pipelines and deployment automation processes. Ensure all delivered solutions meet quality, security, and performance standards. Participate in code reviews and promote software engineering best practices. Operational Support & Continuous Improvement Provide Level 3 support for Digital Sales applications and integrations. Investigate and resolve production issues impacting customer-facing digital solutions. Monitor system health and proactively identify opportunities for improvement. Contribute to reducing technical debt and improving platform stability. Support business continuity and operational resilience across critical customer-facing applications. Essential Requirements For The Position Minimum bachelor’s degree in computer science, or a related field. Experience in full-stack development (.NET/C#, React). Knowledge of Azure services and API development. Ability to mentor and collaborate effectively within a team. Problem-solving skills and experience with debugging and optimization. Be fluent in both spoken and written English; other languages are considered as an advantage. Working Conditions Internally this position is called: Analyst IT Digital Products Based in Luxembourg Headquarters with regular office presence. Flexible working hours. A Certificate of good conduct (Casier judiciaire, Polizeiliches Führungszeugnis) will be required in case of positive selection