Software Engineer for Rucio Development

Job Posting Organization:
CERN, the European Organization for Nuclear Research, is a leading scientific research institution established in 195

• It is known for its groundbreaking work in particle physics and is home to the Large Hadron Collider, the world's largest and most powerful particle accelerator. CERN employs over 2,500 staff members and collaborates with thousands of scientists from around the globe, representing more than 100 nationalities. The organization operates in multiple countries and is dedicated to pushing the frontiers of science and technology, fostering an environment of innovation and collaboration.

Job Overview:
The position within the ATLAS Experiment at CERN focuses on the development and operation of Rucio, an open-source scientific data management system that is crucial for managing large-scale scientific data across various experiments. The successful candidate will join a team of software engineers and computing specialists dedicated to enhancing Rucio's capabilities to support the ATLAS Experiment and other scientific collaborations. Responsibilities include designing and developing components specific to Rucio and ATLAS, ensuring the system meets the data management challenges posed by the High-Luminosity Large Hadron Collider (HL-LHC), and collaborating with experts across CERN and the wider Rucio community. The role requires a strong commitment to improving the usability, scalability, and performance of Rucio, as well as contributing to DevOps practices and operational activities for the ATLAS Rucio production deployment.

Duties and Responsibilities:
The duties and responsibilities of the position include evolving the transfer and policy engines of Rucio to meet the requirements of HL-LHC scale, improving the usability and performance of Rucio for the ATLAS Experiment, contributing to DevOps and operational activities for the ATLAS Rucio production deployment, maintaining core components of Rucio, and contributing to the evolution of Rucio within the broader scientific data management community. The role also involves collaborating with multidisciplinary teams and participating in the development of solutions that address complex data management challenges.

Required Qualifications:
Candidates must have proven experience in software engineering for distributed, large-scale, or data-intensive systems. A strong track record of developing and maintaining production-grade software is essential, along with experience in designing and implementing distributed services, APIs, or data management systems at scale. Practical experience with DevOps practices, including automated testing, CI/CD pipelines, and production service operations, is required. Familiarity with scientific computing environments and large-scale data processing frameworks is advantageous, as is experience with containerized deployments and orchestration in production environments. Contributions to open-source software projects or experience in collaborative distributed development environments are considered assets.

Educational Background:
The position requires candidates to be nationals of a CERN Member or Associate Member State and to have a professional background in Computer Science or a related field. Candidates should possess either a Master's degree with 2 to 6 years of post-graduation professional experience or a PhD with no more than 3 years of post-graduation professional experience. It is also required that candidates have never held a CERN fellow or graduate contract before.

Experience:
Candidates should have a solid level of experience in software engineering, particularly in distributed systems and data-intensive applications. The ideal candidate will have a proven background in developing and maintaining production-grade software, with specific experience in the design and implementation of distributed services and data management systems at scale. Experience in DevOps practices and operating production services in Linux-based environments is also essential.

Languages:
Proficiency in spoken and written English is mandatory, and candidates should demonstrate a commitment to learning French. This bilingual capability is important for effective communication within the diverse, international environment at CERN.

Additional Notes:
The position is a full-time role with a contract duration of 24 months, with the possibility of extension up to a maximum of 36 months. The working hours are set at 40 hours per week, with hybrid job flexibility. The target start date for the position is August 1, 202

• The role may require stand-by duty and work during nights, Sundays, and official holidays as needed by the organization. The compensation includes a monthly stipend ranging from 6372 to 7004 Swiss Francs, tax-free, along with 30 days of paid leave per year, comprehensive health insurance coverage, family allowances, and a relocation package depending on individual circumstances. On-the-job and formal training, including language classes, will also be provided.