Senior Superconducting Device Modeling Engineer

Limelight Health; Aubervilliers; Hybride; EUR 80 000 - 100 000; Plein temps

Résumé du poste

A pioneering quantum technology startup in Île-de-France is seeking a Senior Superconducting Device Modeling Engineer to join its team. You will bridge nanofabrication processes with device performance and contribute to improving chip reliability and yield. Candidates should have a Master's or Ph.D. in a relevant field and experience in device modeling. The role offers opportunities for innovation and flexible work arrangements.

Prestations

Ownership program

Patent bonuses

Flexible remote policy

Parental benefits

Subsidized gym membership

Mental health support

25-day vacation policy

Transportation cost coverage

Competitive health coverage

Meal vouchers

Qualifications

• 5+ years of experience in process and device modeling, preferably in superconducting circuits.
• Strong background in semiconductor/superconductor device modeling and process variation analysis.
• Familiarity with statistical and data-driven approaches is a plus.

Responsabilités

• Develop and maintain models of nanofabrication processes and link them to device performance metrics.
• Model the impact of process variations on device and circuit performance.
• Collaborate with design team to define new test structures.

Connaissances

Process and device modeling

Superconducting materials knowledge

Simulation and modeling tools

Analytical problem-solving

Statistical approaches knowledge

Formation

Master’s degree or Ph.D. in Physics, Electrical Engineering, Materials Science

Outils

COMSOL

Ansys EDT

Python

Klayout

Description du poste

Alice & Bob is developing the first universal, fault-tolerant quantum computer to solve the world’s hardest problems.

The quantum computer we envision building is based on a new kind of superconducting qubit: the Schrödinger cat qubit. In comparison to other superconducting platforms, cat qubits have the astonishing ability to implement quantum error correction autonomously!

We are at the forefront of the quantum race, competing with tech giants such as Google or IBM, and we are growing fast after securing €100 million of funding in 2025 to develop our unique technology.

Currently 100+ and counting, between physicists, PhD students, engineers and experienced business professionals, we are united to reach our ambitious goal. Are you a quantum pioneer? Join us on a mission to reshape the future!

We are building our own prototyping cleanroom in Île-de-France (operation planned for early 2026), designed to accelerate design iterations, reduce fabrication lead times, and strengthen our nanofabrication capabilities for high-performance and 3D integration.

Within the Quantum Hardware department, the Foundries & Process Integration (FPI) team plays a key role by bridging front-end and back-end nanofabrication with design and device performance. Its mission includes process data analysis, device modeling, transversal failure analysis, and managing foundry collaborations to ensure scalability.

We are looking for a Senior Superconducting Device Modeling Engineer to join our Foundries and Process Integration team. In this role, you will bridge front-end and back-end nanofabrication with device performance by modeling how material properties, process parameters and variations impact superconducting qubit behavior. You will help guide process development, support the design of test structures, and contribute to improving chip performance, yield, and reliability.

Responsibilities:

• Develop and maintain models of nanofabrication processes (lithography, etching, oxidation, deposition, packaging) and link them to device performance metrics (Qi, T1, inductance uniformity, etc.).
• Model the impact of process variations (thickness, linewidth, resistivity, junction parameters, etc.) on device and circuit performance, performing tolerance and sensitivity analyses.
• Collaborate with design team to define and validate new test structures that benchmark process stability and device behavior.
• Model superconducting material properties and associated loss channels and propose methods to mitigate them.
• Contribute to the equipment strategy for process and material testing (e.g., cryogenic probe station or He³ cryostat with DC lines, CIPT, etc.), including evaluation, acquisition, and validation.
• Analyze experimental and characterization data to refine and validate models (SPC, DOE, regression, machine learning approaches).
• Propose and support process improvement plans based on modeling-driven insights.
• Participate in the validation of new equipment for both FE & BE nanofabrication, including correlation of metrology with device modeling.
• Support technology transfer to and from external foundries, ensuring design and process compatibility through predictive modeling.
• Document and communicate modeling approaches, results, and recommendations across teams.

Requirements:

• Master’s degree or Ph.D. in Physics, Electrical Engineering, Materials Science.
• 5+ years of experience of process and device modeling preferably in the field of superconducting circuits.
• Strong background in semiconductor/superconductor device modeling and process variation analysis.
• Knowledge of superconducting materials and devices, including loss mechanisms (dielectric loss, interface loss, quasiparticles).
• Proficiency with simulation, modeling and design tools (e.g., COMSOL, Ansys EDT, Python and Klayout for custom modeling).
• Experience designing and analyzing loss test structures (CPW resonators, junction test devices).
• Familiarity with statistical and data-driven approaches (SPC, DOE, machine learning) is a strong plus.
• Strong analytical and problem-solving skills with attention to detail.
• Excellent communication skills and ability to work in cross-disciplinary teams.
• Curiosity, adaptability, and collaborative mindset.

Benefits:

• Our success is your success : own it with our BSPCE plan
• Turn your ideas into patents – and (competitive) patent bonuses
• Flexible remote policy, up to 40 % a month
• A Parental plan including additional benefits such as crèche support or additional days-off to take care of under 12 years old children
• Subsidized membership with Urban Sports Club
• Mental health support with moka.care
• 25-day vacation policy (as per French law) + RTT
• Half of transportation cost coverage (as per French law), or yearly allowance for the die-hard bicycle users
• Competitive health coverage, with Helium/Axa
• Meal vouchers with Swile, as well as access to a fully equipped and regularly stocked kitchen

Recruitment Process:

• Screening Call with Giusy, Talent Acquisition Specialist (30 min)
• Hiring Manager Interview with the Hiring Manager (45 min)
• Technical Interview/Presentation with the Team (60 min)
• Leadership and Fit Interview (45 min)

Research shows that women might feel hesitant to apply for this job if they don't match 100% of the job requirements listed. This list is a guide, and we'd love to receive your application even if you think you're only a partial match. We are looking to build teams that innovate, not just tick boxes on a job spec.

You will join one of the most innovative startups in France at an early stage, to be part of a passionate and friendly team on its mission to build the first universal quantum computer!

We love to share and learn from one another, so you will be certain to innovate, develop new ideas, and have the space to grow.