CFD Software Engineer

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://altair.com/altair-cfd-capabilities/#lbm):
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

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