CFD Software Developer

**CFD Software Engineer (f/m/d)**

We are a leading global software company dedicated to the

world of computer aided design, 3D modeling and simulation—helping innovative

global manufacturers design better products, faster! With the resources of a

large company, and the energy of a software start-up, we have fun together

while creating a world class software portfolio. Our culture encourages

creativity, welcomes fresh thinking, and focuses on growth, so our people, our

business, and our customers can achieve their full potential.

**Position Overview**

Are you a passionate Software Engineer who enjoys working at

the intersection of numerical methods, high-performance computing, and

real-world engineering applications? We are searching for a talented CFD

Software Engineer to join our solver development team for Simcenter Ultrafluid (formerly Altair ultraFluidX, [<https://www.siemens.com/en-us/products/simcenter/fluids-thermal-simulation/ultrafluid/>](https://www.siemens.com/en-us/products/simcenter/fluids-thermal-simulation/ultrafluid/)), a small, dynamic, and agile team delivering world-class CFD software to

industries including automotive, heavy industry, and consumer electronics.

Simcenter Ultrafluid features a native GPU-based

implementation of the Lattice Boltzmann Method (LBM), allowing users to run

fully transient, high-fidelity aerodynamics and aeroacoustics simulations

overnight on a single compute server. The solver is designed to handle complex

geometries and demanding industrial use cases, delivering high-fidelity,

predictive simulations of real engineering processes, including turbulent

flows, thermal transport, and complex geometry handling.

If you are seeking a role where you can contribute directly

to solver development, algorithm implementation, and GPU acceleration, while

translating cutting-edge academic research in numerical methods into a

high-performance, easy-to-use software product, and collaborating closely with

the whole development team on the advancement of the code and its capabilities,

then we'd love to hear from you!

**Responsibilities**

• Contribute

• to the code development of Simcenter Ultrafluid as part of the agile
• development team

• Specify,

• implement, test, and document new high-quality features of the solver in
• close collaboration with the other team members

• Contribute

• to performance benchmarking and code optimization in a massively parallel
• GPU environment, while collaborating with other development teams across
• HPC, pre/post-processing, and meshing to integrate Simcenter Ultrafluid
• into the broader Simcenter ecosystem

• Collaborate

• with product management, application specialists, and QA engineers to
• ensure the solver meets real-world industrial needs

• Participate

• in daily stand-ups as well as regular review, retrospective, and planning
• meetings
• **Required Knowledge/Skills, Education, and Experience**

• <M.Sc>.

• or Ph.D. degree in mechanical engineering, computational mechanics,
• computer science, or a comparable physics-based discipline

• At

• least two years of hands-on experience in CFD solver development in a
• commercial or academic environment

• High

proficiency in C++ and parallel programming

• Excellent

English communication skills

• Passion

• for numerical simulation and a drive to find creative solutions for
• challenging industrial use cases with a focus on customer value

• Willingness

• to work in a close-knit, agile development team
• **Preferred Qualifications**

• Experience

with scripting or scientific programming languages such as Python or Julia

• Solid

understanding of the Lattice Boltzmann Method (LBM) and its application in

CFD

• Solid

• understanding of GPU architectures and experience with the CUDA toolkit
• **Why us?**
• At Siemens Software, flexibility is how we work—hybrid by
• default, built on trust and autonomy. Together, 30,000 people across more than
• 200 countries build technology that shapes the real world. You'll grow through
• real projects, strong technical peers, and global mobility, backed by the scale
• and benefits of an industrial software leader. We're committed to equality and
• inclusion, and we hire based on merit, skills, and impact. Bring you curiosity
• and creativity and help us shape tomorrow!
• Siemens Software. Transform the Everyday