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We are looking for a Microwave / RF Engineering Intern to support the design, simulation, characterization, and optimization of cryogenic microwave components used in our quantum wiring products. You will work closely with experienced RF and quantum engineers, contributing to both simulation and hands-on lab work. This internship provides a unique opportunity to apply microwave engineering in a cutting-edge quantum hardware context.
About Isentroniq
At Isentroniq, we are building the future of computing, not in theory, but in hardware. We enable quantum computing at scale by developing superconducting circuits solutions to increase the qubit count by more than a 100x at fixed cost and size of infrastructure.
We share knowledge openly, challenge ideas constructively, and stay focused on what matters. Our values - gritty ambition with humility, radical candor, methodical audacity and sense of belonging - are at the core of how we work and grow.
If you’re passionate about transformative innovation, and ready to build what quantum needs to go further, join us and let’s shape the future together.
Key Responsibilities
Design and simulation of microwave components using EM simulation tools
Experimental characterization of components using VNA, spectrum analyzer, and cryogenic measurement setups.
Prototyping activities such as preparing PCB layouts, assembling components, and troubleshooting signal integrity issues.
Measurement scripting and data analysis in Python (automation, calibration routines, S-parameter processing).
Documentation of tests, procedures, and design iterations to support internal knowledge building.
Who you are
You’re a hands-on builder who likes understanding how things really work. You enjoy combining theory, simulation, and lab experimentation, and you learn best by designing, testing, and iterating. You value open discussion and enjoy working with teammates who challenge and support one another. Above all, you are motivated by joining an ambitious team working to push the limits of hardware and unlock a new era of scalable quantum computing.
Key Qualifications
Master’s student or gap-year student in RF engineering, Electrical Engineer or related field
Previous experience in designing with HFSS, CST, or ADS
Experience with PCB Design (eg. Altium) and PCB soldering, test & debugging using VNAs, PSA or multimeter, and KiCad software
Familiarity with S-parameter, eigenmode, electrostatic and/or magnetostatic simulations.
Proficient in Python (scikit-rf, tool Apis) for automation, GDS generation, and data analysis.
Bonus
Familiar with microwave components in the 0-20 GHz band: filters, attenuators, broadband circulators, impedance adapters
Familiar with structures like stripline, microstrip, CPW, 3D packages & cavities.
Proficiency in French
Personal Attributes
You are autonomous, ambitious, organized
You are a builder. You are hands-on, enjoy discomfort and are not afraid to do make things from scratch: complete setups, scripts, purchases, processes, etc.
You embody an engineer’s mindset, with meticulous attention to details and a systematic approach to problem-solving.
You value transparency and open communication, fostering trust and collaboration. You enjoy having your ideas and suggestions be boldly challenged and you feel free to speak about achievements and mistakes.
You are eager to learn and grow. You recognize the strength of teamwork. You feel challenged by competing alternative approaches, instead of looking down on them.
You thrive in an environment of high expectations, pushing boundaries to achieve breakthroughs.
What We Offer
A unique opportunity to shape the technological direction of a cutting-edge start-up.
The unique chance to develop a scale-up-enabling products and the quantum test machines that will drive the company’s success.
A collaborative, mission-driven culture with a focus on personal and professional growth.
Job Type
Internship (6 months)
Location
Paris & Saint-Germain-en-Laye, France
Start Date
Q1 2026
Join us making quantum computing happen.
Please send your CV and a cover letter outlining your relevant experience and motivation.
Applications will be reviewed on a rolling basis, so we encourage early submissions.
