Apprenti validation & test de solveur CFD h/f - Strategic Student Program

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Start your career with the Strategic Student Program (SSP):

The Strategic Student Program is our formal apprenticeship program globally. You will be mentored by guides and gain invaluable professional experience. At Siemens, SSP apprentices get access to an international student network and community, career development opportunities with professional growth pathways, comprehensive practical training throughout the program, access to the Siemens Learning Hub and other training materials, and the opportunity to collaborate on exciting projects within a global, diverse team.

Position Overview:

As part of the international R&D team dedicated to Simcenter Ultrafluid (formerly Altair ultraFluidX), you will play an active role in ensuring the quality and reliability of our simulation software.

Simcenter Ultrafluid is a GPU-based CFD solver employing the Lattice Boltzmann method, designed for high-fidelity aeroacoustics, unsteady aerodynamics, and aerothermal simulations. The team works in an agile fashion across multiple countries (Germany, France, Sweden, and the USA).

For more information: Altair CFD™ Capabilities

Responsibilities:

Your main responsibilities consist of working specifically on the tools and processes that ensure the scientific quality of our solver. They are organized around the following points:

• Design and maintain validation test cases based on academic literature and reference benchmarks, comparing solver results against analytical solutions and published data (experimental or reference calculations);
• Contribute to the development and maintenance of our Python-based test framework, helping to automate and scale our validation CI/CD pipeline;
• Collaborate closely with solver developers to investigate discrepancies, document findings, and drive continuous improvement of our validation processes. You will work in close collaboration with your experienced colleagues in a caring and flexible work environment.

This 12-month apprenticeship position is based in Lyon and available from September 2026.

Required Knowledge/Skills, Education, and Experience:

Currently enrolled in an engineering program or equivalent in computer science, applied mathematics, fluid mechanics, computational mechanics, or a related field, you are looking for a 12-month apprenticeship contract:

• You have solid software development skills, particularly in Python and/or C++.
• Knowledge of numerical and/or fundamental/theoretical CFD methods is appreciated; familiarity with Lattice Boltzmann methods would be a bonus.
• You are open-minded, curious, and rigorous, with good interpersonal skills that allow you to collaborate easily in an international environment.
• Your communication skills in both French and English enable effective collaboration within the extended team, and your strong critical thinking skills help you thrive in a scientific setting.

Why us?

Working at Siemens Software means flexibility — choosing between working at home and the office at other times is the norm here. We offer great benefits and rewards, as you would expect from a world leader in industrial software. A collection of over 377,000 minds building the future, one day at a time, in over 200 countries. We're dedicated to equality, and we welcome applications that reflect the diversity of the communities we work in. All employment decisions at Siemens are based on qualifications, merit, and business need. Bring your curiosity and creativity and help us shape tomorrow!

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