CFD Solver Developer (Computational Physics)

Siemens Digital Industries Software; Katowice; On-site; PLN 168,400 - 319,900; Full time

Job summary

Siemens Digital Industries Software is hiring a CFD Solver Developer for the M-Star team. You will contribute to solver architecture, GPU acceleration, and multiphysics model implementation, collaborating with users and support engineers to keep the software scientifically rigorous and practically useful.

The role focuses on fluid dynamics, multiphase flows, advection-diffusion, particle mechanics, and heat transfer, with an emphasis on scalable GPU architectures and distributed memory systems.

Qualifications

• Expertise with Lattice Boltzmann Methods (LBM) for fluid simulation.
• Background in numerical methods for transport physics (fluid dynamics, advection-diffusion, particle mechanics, or heat transfer).
• Writing high-performance physics codes using parallel computing in shared and distributed memory systems.

Responsibilities

• Develop and maintain M-Star’s CFD solver, including features and validation.
• Translate academic research into a high-performance software product.
• Model physics like fluid dynamics, multiphase flows, advection-diffusion, particle mechanics, heat transfer.
• Implement meshing algorithms and data structures for GPU architectures in distributed memory.

Skills

LBM experience

CUDA

Parallel computing

MPI

Multiphysics

Fluid dynamics

Tools

CUDA Toolkit

MPI libraries

Job description

Siemens Digital Industries Software is a leading provider of solutions for the design, simulation, and manufacture of products across many different industries. Formula 1 cars, skyscrapers, ships, space exploration vehicles, and many of the objects we see in our daily lives are being conceived and manufactured using our software.

Are you a Physicist who enjoys working at the intersection of numerical methods, high-performance computing, and real-world engineering applications? We’re hiring a CFD Solver Developer to join our M-Star team – a small, highly effective and efficient specialized team that delivers world-class CFD software to multiple industries including Life Sciences, Chemical Materials, and Industry. M-Star is modern computational fluid dynamics (CFD) software that provides first-principles modeling tools for scientists and engineers, generating predictions that are functionally indistinguishable from measured data. M-Star is building a GPU-native, multiphysics solver for complex fluid and particle systems. Our platform is designed to deliver high-fidelity, predictive simulations of real industrial processes, including turbulent mixing, multiphase flows, particle transport, heat and mass transfer, and chemically reactive systems. We focus on mechanistic modeling rooted in transport physics, rather than empirical tuning, enabling reliable predictions across a wide range of operating conditions and scales.

If you are seeking a role where you can contribute directly to solver architecture, algorithm development, GPU acceleration, and multiphysics model implementation, while collaborating with users and support engineers to ensure the software remains both scientifically rigorous and practically useful, we’d love to hear from you.

You’ll make a difference by:

• Developing M-Star’s fluid dynamics solver including maintenance, feature addition, algorithm implementation, and validation.
• Translating academic research in numerical methods into a high-performance, easy-to-use software product.
• Modeling a wide range of physics including fluid dynamics, multiphase flows, advection-diffusion, particle mechanics, and heat transfer.
• Implementing meshing algorithms and data structures for GPU architectures in a distributed memory environment.
• Working with support engineers and users to tailor software to current needs.
• Performing validation studies and presenting results at conferences.

Your success is grounded in:

• Expertise with Lattice Boltzmann Methods (LBM) for fluid simulation.
• Background in numerical methods for transport physics (fluid dynamics, advection-diffusion, particle mechanics, or heat transfer).
• Writing high-performance physics codes using parallel computing in shared and distributed memory systems.
• Knowledge of the Discrete Element Method (DEM) for particle mechanics.
• Specialization in numerical methods for multiphase modeling of liquid-liquid and gas-liquid systems.
• Algorithms for computational geometry including structured/unstructured meshing, 3D search, and mesh refinement.
• Detailed understanding of GPU architectures and CUDA toolkit.
• MPI programming for multi-GPU code development.
• Experience working on a large multiphysics solver.

Join our Digital World

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 your curiosity and creativity and help us shape tomorrow.

Compensation & Benefits

The primary locations for this opportunity are Spain, France, Poland, and Italy. The applicable salary ranges for these locations are:

• Spain: 2,100 - 83,300
• France: 52,800 - 89,700
• Poland: 168,400 - 319,900
• Italy: 49,000 - 81,100

This role is eligible to earn incentive compensation. The actual compensation offered is based on the successful candidate’s job-related skills, experience, and relevant education or training. Siemens offers health and wellness benefits to employees; you can access the benefits available in your country at https://jobs.sw.siemens.com/benefits/.

This position may also be posted in additional locations beyond those specified above. For such locations, the applicable salary ranges and benefits will be disclosed by the Talent Acquisition Partner at the time of initial contact, in accordance with local legal requirements.

Diversity & Inclusion

We value equal opportunities and welcome applications from all candidates. At Siemens, we believe people who have had real experiences dealing with being different will excel as leaders. We foster a culture of creativity and innovation. We will ensure that individuals with disabilities are provided reasonable accommodation to participate in the job application or interview process, to perform essential job functions, and to receive other benefits and privileges of employment. Please contact us to request accommodation.

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