Modeling & Simulation Engineer – Quantum Hardware (f / m / d)

eleQtron  develops and operates full-stack quantum computers based on trapped-ion technology. Quantum computing is a new computing paradigm rapidly approaching commercial viability. Our unique approach combines laser-cooled trapped ions with microwave control and tailored magnetic fields. Our next-generation computing machines under development will be able to find solutions to problems that are out of reach today, thus enabling new innovative products and services for a brighter future.

We are looking for a  Simulation Engineer (f / m / d).

Responsibilities :

As a Simulation Engineer (f / m / d), you will model, simulate, and optimize ion trap systems. The role involves high-accuracy simulations of electrostatic, RF, magnetic, and microwave fields, as well as ion shuttling dynamics and trapping potentials, using COMSOL Multiphysics. You will collaborate closely with interdiscplinary quantum engineers to translate physical designs into validated simulation models, guiding device development and workflow integration that support the company’s scaling strategies toward fault-tolerant quantum computing.

Electromagnetic & Field Simulations

Model static and time-dependent electrostatic potentials of segmented ion traps

Simulate RF (Paul trap) fields and derive effective (pseudopotential) trapping potentials

Compute magnetic field distributions, including gradients and field stability

Simulate microwave field distributions for qubit control and coupling

Ion Dynamics & Transport

Simulate single- and multi-ion dynamics in time-dependent potentials

Analyze ion shuttling protocols, including transport speed, motional excitation, and heating

Evaluate stability regions, secular frequencies, and micromotion effects

Modelling & Analysis

Develop parameterized COMSOL models to explore design trade-offs

Extract physical quantities (trap depths, frequencies, field homogeneity)

Validate simulation results against analytical models and experimental data

Automate simulation workflows where appropriate (e.g. via COMSOL LiveLink)

Collaboration & Documentation

Interface with experimental and theoretical teams to refine trap designs

Clearly document simulation assumptions, methods, and results

Provide actionable design recommendations based on simulation outcomes

Required skills :

MSc or PhD in Physics, Electrical Engineering, or a related field with strong understanding of ion trapping physics (Paul traps, pseudopotential theory)

Strong foundation in classical electromagnetism and classical mechanics

Experience simulating electrostatic, RF, magnetic, and microwave fields

Familiarity with time-dependent simulations and particle tracing / analysis

Experience with numerical and FEM-based simulation tools, such as COMSOL Multiphysics (AC / DC and RF Modules preferred)

Scripting experience (e.g. Python, MATLAB or COMSOL LiveLink); version control(e.g.Git) is a plus

Ability to critically assess scientific literature and technical reports, define validation strategies, and report R&D results in a structured and traceable manner

Nice-to-have :

Experience in quantum information, trapped ions, or atomic physics

Knowledge of heating mechanisms, motional decoherence, or noise sources

Exposure to experimental ion trap setups or hardware constraints

Practical understanding of microwave engineering or RF electronics

What you can expect from eleQtron :

Competitive salary :  We value our team members and therefore provide remunerations that reflect this, additionally rewarding achievements.

Flexible working hours :  We offer personal freedom through a variety of flexible work schedules.

Team spirit :  In our international and diverse team, and with our regular team events, having fun at work is simply part of the game.

Further development :  We want to grow together and so we offer our team members’ needs-based, individualized further training as well as plenty of room for personal development.

Wellness Package :  We offer health-promoting benefits such as fitness programs like UrbanSportsClub to support your well-being.

Moving Benefits :  A warm welcome! We are happy to support employees who move for us with a bonus.

At the forefront :  Work at the forefront of technology, where academic research meets commercial applications.

Modern workplace :  We have a high-quality infrastructure with laboratory space, offices, and meeting rooms.