Full-Stack Software Engineer

Company Description At CERN, the European Organisation for Nuclear Research, physicists and engineers are probing the fundamental structure of the universe. Using the world's largest and most complex scientific instruments, they study the basic constituents of matter - fundamental particles that are made to collide together at close to the speed of light. The process gives physicists clues about how particles interact, and provides insights into the fundamental laws of nature. Job Description Introduction - Join the team behind CERN’s Asset and Maintenance Management Platform, a cornerstone system managing over 3 million assets 24/7 across one of the world’s most complex research infrastructures. - Work in an Agile, DevOps-oriented environment, collaborating with experts in software engineering, data management and operations to continuously improve critical enterprise systems. - Full-stack development, enterprise applications, Java/Spring and React frameworks, RESTful integrations, HxGN EAM, DevOps and Agile practices, user experience design, data integrity, cybersecurity, scalability and performance are just a few of the keywords related to this position. Functions - Participate in software design, system architecture, and integrations with enterprise applications. - Take responsibility for implementing modern, high-performing, and responsive web applications, as well as robust backend services. - Conduct and coordinate code reviews, testing, monitoring, and general system management tasks, including configuration, and deploying upgrades and patches. - Document your work and progress to facilitate teamwork and enhance software maintainability. - Liaise with users to transform their expressed needs into application requirements and design specifications. - Take an active role in the continuous effort to improve both the services and tools provided, including user support and documentation. - Coach and guide junior developers in the team, ensuring continuous follow-up and training. Qualifications Master's degree or equivalent relevant experience in the field of Software Engineering or a related field. Experience: - Proven track record in designing and developing applications using the Spring ecosystem and/or the Java EE platform. - Extensive expertise in web technologies, including JavaScript, HTML5, and CSS, and a clear understanding of how these technologies interact, complemented by experience with modern libraries for building user interfaces, with a preference for React. - Hands-on experience in requirements analysis, software design, and system architecture. - Proficiency in designing, implementing, and utilising web services (SOAP/REST) for system integrations. - Experience applying Agile methodologies and employing DevOps practices throughout the development process. - Experience in coaching or guiding junior team members to support their growth and productivity. The following experience will be considered an asset: - Working knowledge of relational databases. - Development experience and in-depth knowledge of a major EAM platform, preferably HxGN EAM. - Business analysis experience within the IT field. - Expertise in machine learning algorithms, methodologies, and frameworks. Technical competencies: - Knowledge of programming techniques and languages: including Java (Spring ecosystem), JavaScript, React (or similar), HTML5, SQL, Git, and Maven. - Testing, diagnosing and optimisation of software: including proactive monitoring, system customisation, applying patches, and managing major system upgrades. - Re-use, refactoring, integration and porting of existing software: with a focus on defining and managing interfaces, particularly through web services. - Conceptualising, designing and developing user experiences and interfaces: based on expressed user requirements and complex workflows. - Knowledge of best practices for developing secure software: including modern authentication and authorisation protocols, ensuring robust and secure system access. Behavioural competencies: - Working in Teams: working well in groups and readily fitting into a team; participating fully and taking an active role in team activities. - Learning and Sharing Knowledge: sharing knowledge and expertise freely and willingly with others; coaching others to ensure knowledge transfer. - Achieving Results: delivering high quality work on time and fulfilling expectations. - Managing Self: working well autonomously; taking on activities and tasks without prompting. Language skills: Spoken and written English, with a commitment to learn French. Additional Information Eligibility and closing date: Diversity has been an integral part of CERN's mission since its foundation and is an established value of the Organisation. Employing a diverse workforce is central to our success. We welcome applications from all Member States and Associate Member States. This vacancy will be filled as soon as possible, and applications should normally reach us no later than 04.01.2026 at 23:59 CET. Employment Conditions Contract type: Limited duration contract (5 years). Subject to certain conditions, holders of limited-duration contracts may apply for an indefinite position. Working Hours: 40 hours per week Job Flexibility: Hybrid This position involves: - Work during nights, Sundays and official holidays. - Stand-by duty, when required by the needs of the Organisation. Job grade: 6-7 Job reference: EN-IM-AMM-2025-240-LD Field of work: Software Engineering and IT Benchmark Job Title: Computing Engineer