Job Description

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're a diverse team of 200+ brilliant minds from over 30 countries united by a single goal: to revolutionise computing with a practical fault-tolerant quantum machine. Are you ready to take on unprecedented challenges and contribute to revolutionising technology? Join us, and let's shape the future of quantum computing together!

As an RF Sub Systems Design & Characterization Intern, your mission is to support the design, development, integration, and validation of RF hardware used to control Quantum bits (Qubits). Guided by senior engineers, you will gain hands-on experience on leveraging performance RF instruments, characterizing cryogenic components, and automating test workflows.

Following the candidate’s abilities, there will be 3 main possible topics to focus on:

• Cryogenic Bias tee footprint reduction

• RF Readout chain optimization at room temperature

• RF Readout chain optimization at cryogenic temperatures

As part of the team, you will contribute to solving technical challenges involving the entire signal chain from room temperature to cryogenics, by designing RF sub systems prototypes on PCB, manipulating different instruments to acquire data, and gathering inputs from your market tech watch. Working closely with cross functional teams of engineers and scientists, you’ll help to improve system performance and develop the next generation of quantum hardware platforms.

This internship will start in September 2026 for a duration of 5-6 months.

Responsibilities:

• Integrate and test control electronics and instrumentation (RF, DC, etc.) with the help of senior engineers.
• Characterize, simulate, and design RF hardware at room temperature and cryogenic temperatures (bias tees, filters, …)
• Rapidly design and prototype sub-systems for Qubits control, considering the electromechanical integration inside of the cryostat or the racks.
• Analyze and compare different RF component manufacturing technologies (substrates, processes, connectors, packaging, cables, etc.) in terms of performance, EMC, accessibility, and feasibility.
• Assist with test bench setup, cabling, equipment maintenance and monitoring.
• Perform lab measurements using RF bench equipment (VNAs and analyzers).
• Define, optimize, and automate the test programs needed to qualify or validate system hardware conformity.
• Preparing complete, well-documented test plans and reports results.
• Monitor instrument and component stock.
• Collaborate with multidisciplinary teams to develop and integrate systems required to control quantum chip architectures.

Requirements:

• Engineering or master's student (4-5 years of higher education) specializing in microwave frequencies, RF electronics, telecommunications, applied physics, computing, instrumentation, or related fields.
• Solid understanding of RF systems, S-Parameters, and wave propagation.
• Experience with RF test equipment, signal characterization and analysis techniques (VNA, Spectrum Analyzer, and oscilloscope).
• Experience with RF cad tools (HFSS, Keysight ADS,…)
• Familiarity with Python for RF data analysis and post-processing (NumPy, scikit-rf, matplotlib).
• Familiarity of using basic lab and prototyping tools (multimeter, torque driver, power tools, soldering iron).
• Ability to work as part of a team, with a strong spirit of innovation.
• Excellent communication skills in English, both written and oral. (English level B1/B2)

Benefits:
- 1 day off per month
- Half of transportation cost coverage (as per French law)
- Meal vouchers with Swile, as well as access to a fully equipped and regularly stocked kitchen
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 of 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.