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We are looking for two Quantum Microwave Interns to help prototype our quantum wiring product. Each internship centres around a distinct, clearly defined project, and both involve contributing to the first versions of our simulation and measurement software and working closely with our cryogenic quantum measurement setup. Our internships are highly hands-on, spanning software development, experimental physics, and RF engineering - you will work directly with hardware, instrumentation, and code to automate RF designs, analyse physical data, and validate and iterate on our core technology.
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 circuit solutions that increase qubit count by more than 100x at fixed cost and infrastructure size.
We share knowledge openly, challenge ideas constructively, and stay focused on what matters. Our values - gritty ambition with humility, radical candor, surgical audacity, and self-accountable teamwork - 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.
Key Responsibilities
Each intern will focus on one of two core projects:
Quantum Characterization & Simulation (Project A)
Build a quantum wiring simulation demonstrator: develop software to virtualize a cryostat cabling scheme, enabling simulation of cryogenic quantum wiring networks and evaluation of overall system performance.
Leverage superconducting qubits as metrological tools to characterize microwave line temperatures in the millikelvin regime and quasiparticle tunneling rates -two of the key factors limiting superconducting QPU performance.
RF Structure Design & Automation (Project B)
Design and simulate passive RF structures for cryogenic quantum hardware (including transmission lines, resonators, impedance transitions, and filters) and validate their performance through analytical models and EM simulation tools.
Develop a Python-based automation workflow that takes high-level RF specifications as input and generates optimized, simulation-ready designs, accelerating the RF iteration cycle for our quantum wiring product.
Who you are
We’re looking for a talented and passionate student, eager to learn and do hands-on experimental work and programming for quantum systems. You have an engineering mindset and love seeing ideas turn into working demos and products rapidly.
Key Qualifications
Master’s student in Physics, Engineering, or a related field.
Python coding skills.
Strong background in linear algebra. It is the heart of Quantum physics and microwave engineering.
Communication proficiency in English. Your supervisors will be world class quantum and radiofrequency engineers but won’t speak French.
Bonus
Familiarity with quantum mechanics and / or radiofrequency engineering.
Prior experience with EM, e.g., with simulation software such as Ansys HFSS, CST, or ADS.
Personal Attributes
You are autonomous, ambitious, and organized.
You are a hands-on builder, comfortable starting from scratch and willing to own things end-to-end - setups, scripts, purchases, processes.
You communicate openly and directly: you welcome pushback on your ideas and are candid about both wins and mistakes.
You are eager to learn and grow. You see competing approaches as a feature, not a threat, and draw strength from collaboration.
You thrive under high expectations, pushing for breakthroughs rather than settling for good enough.
What We Offer
A unique opportunity to participate to the origin of a cutting-edge start-up.
Work with and learn from world-class talents
A collaborative, mission-driven culture with a focus on personal and professional growth.
Job Type
Internship (4-6 months)
Location
Saint-Germain-en-Laye, France
Start Date
Q3 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.
