Software Developer for LHCb Simulation

Job Posting Organization:
CERN, the European Organization for Nuclear Research, was established in 1954 and is one of the world's largest and most respected centers for scientific research. With over 2,500 employees and thousands of scientists from around the globe collaborating on various projects, CERN operates in multiple countries and is known for its groundbreaking work in particle physics. The organization is dedicated to probing the fundamental structure of the universe and studying the basic constituents of matter using the world's largest and most complex scientific instruments.

Job Overview:
The position involves contributing to the LHCb experiment at CERN, which focuses on exploring the differences between matter and antimatter and searching for new physics. The successful candidate will work on the Gauss simulation framework, which is being updated to enhance its capabilities for accurate and large-scale Monte Carlo samples essential for physics analysis and future detector upgrades. The role requires participation in the development and maintenance of the simulation software, ensuring its reliability and consistency in a flexible manner, particularly in a heterogeneous computing environment. The candidate will also explore new approaches in simulation software, integrating machine learning and GPU acceleration to improve computational performance.

Duties and Responsibilities:
Key responsibilities include contributing to the development of the Gaussino and Gauss frameworks, implementing multi-threading options for various simulation use cases, and integrating machine learning and GPU technologies into the simulation process. The candidate will also be responsible for creating a user-friendly infrastructure for configuring Gauss and Gaussino, as well as providing ongoing support and maintenance for these frameworks. This role may require working during nights, Sundays, and official holidays as needed by the organization.

Required Qualifications:
Candidates must possess knowledge of high-energy physics (HEP) simulation aspects, including generators, detector geometry, and Geant

• Experience with HEP experiments, their software lifecycle, and building tools is essential. Proficiency in programming languages such as C++ and Python is required, along with strong spoken and written English skills. A commitment to learning French is also necessary. Eligibility criteria include being a national of a CERN Member or Associate Member State and having a professional background in Particle Physics or Software Engineering, with either a Master's degree and 2 to 6 years of post-graduation experience or a PhD with no more than 3 years of post-graduation experience.

Educational Background:
The educational background required for this position includes a Master's degree in a relevant field such as Particle Physics or Software Engineering, or a PhD in a related discipline. Candidates should have completed their degree within the last few years to meet the experience requirements outlined in the job description.

Experience:
The position requires candidates to have either 2 to 6 years of post-graduation professional experience if they hold a Master's degree, or no more than 3 years of post-graduation experience if they have a PhD. This experience should be relevant to high-energy physics, software development, or related fields, demonstrating a solid understanding of the software lifecycle and simulation processes in HEP experiments.

Languages:
Fluency in spoken and written English is mandatory for this position. Additionally, candidates should be committed to learning French, which is considered a valuable asset for communication within the organization and the local community.

Additional Notes:
The contract duration for this position is 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 a target start date of July 1, 202

• The position offers a monthly stipend ranging from 6287 to 6911 Swiss Francs (net of tax), along with comprehensive health coverage for the employee and their family, membership in the CERN Pension Fund, and various allowances depending on individual circumstances. Employees are entitled to 30 days of paid leave per year and will have access to on-the-job and formal training opportunities, as well as in-house language courses for English and/or French.