Full Stack Software Engineer and Service Manager (IT-PW-IAM-2026-100-LD)
Contract
At CERN, the European Organization 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.
Introduction
Are you a skilled full‑stack developer who enjoys taking ownership of real‑world services? Join CERN’s Platforms & Workflows group in the IT department, where we build and operate the Identity and Access Management systems used daily by thousands of researchers, engineers, and collaborators. You will work in an environment where engineering quality truly matters, and where your code directly enables world‑class research.
You will join a supportive team of experienced developers and service managers who value collaboration, continuous learning, and thoughtful engineering. The role offers the opportunity to deepen your full‑stack expertise while gaining hands‑on experience with modern service operations, security practices, and large‑scale digital identity systems.
Responsibilities
* Design, develop and maintain modern web applications built on a .NET backend and React frontend.
* Participate in architectural decisions and contribute to the technical evolution of the IAM platform.
* Participate in service operations, including deployments, troubleshooting, monitoring, and continuous improvements.
* Support and guide junior team members, sharing best practices and contributing to a positive engineering culture.
* Collaborate closely with users and stakeholders: provide advanced user support, gather requirements and enhance the service to meet the evolving needs of the organisation.
* Ensure quality and reliability through documentation, testing, and adherence to security standards.
Qualifications
* Master's degree or equivalent relevant experience in Computer Science or a related field.
* Demonstrated experience in development and maintenance of web applications using modern backend and frontend technologies (e.g. .NET, Java, React, relational databases).
* Experience contributing to the architecture and technical design of software systems.
* Experience operating software services (debugging, deploying, monitoring, upgrading).
* Ability to engage with users, understand requirements, and provide high?quality support.
* Knowledge of programming techniques and languages, advanced knowledge of .NET, C# (or Java), relational databases and SQL (Oracle, MySQL or similar), ReactJS.
* Administration of computing systems, upgrades, application of security patches, system and data migrations, backup and recovery, monitoring and alerting.
* Knowledge and application of software life‑cycle tools and procedures, proficiency with Git, CI/CD tools, containerised deployments.
* Knowledge of best practices for implementing ICT security standards and policies.
* Capturing and analysis of requirements for ICT systems.
* Achieving results: delivering high quality work on time and fulfilling expectations.
* Working in teams: working well in groups and readily fitting into a team; participating fully and taking an active role in team activities.
* Communicating effectively: demonstrating a pro‑active approach to resolving differences; addressing issues of conflict constructively.
* Demonstrating flexibility: adapting quickly and resourcefully to shifting priorities and requirements.
* Learning and sharing knowledge: sharing knowledge and expertise freely and willingly with others; coaching others to ensure knowledge transfer.
Spoken and written English, with a commitment to learn French.
Eligibility and Closing Date
Diversity has been an integral part of CERN's mission since its foundation and is an established value of the Organization. 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 01.06.2026 at 23:59 CEST.
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, when required by the needs of the Organization.
* Stand‑by duty, when required by the needs of the Organization.
Job grade: 6-7
Job reference: IT-PW-IAM-2026-100-LD
Field of work: Software Engineering and IT
Benchmark Job Title: Computing Engineer
Benefits
* A competitive salary (tax free), increasing in line with your years of relevant experience.
* 30 days of paid leave per year plus 2 weeks annual closure.
* Coverage by CERN’s comprehensive health insurance scheme (for yourself, your spouse and children), and membership of the CERN Pension Fund.
* Family, child and infant monthly allowances depending on your individual circumstances.
* A relocation package (installation grant, removal, travel expenses) depending on your individual circumstances.
* Possibility to extend your contract up to 8 years + eligibility for indefinite contract tenure.
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