We're a founding team building at the intersection of quantum hardware and intelligent software. If you're driven by hard problems and meaningful work, we'd love to hear from you.
Helsinki / Remote
Equity-based
Founding Role
The Role
This is a founding scientific position. You will define and build the physics — the models, baselines, and anomaly definitions that make the platform physically meaningful rather than statistically approximate.
This role requires prior familiarity with cryogenic microwave measurement chains used in dilution refrigerator environments.
Responsibilities
- Building physics-based models of microwave signal propagation and thermal behaviour across multi-stage cryogenic RF chains from room temperature to millikelvin stages
- Constructing expected attenuation and noise temperature profiles for typical dilution refrigerator wiring configurations
- Modelling thermal–RF interaction effects including attenuator self-heating, imperfect thermalization, and temperature-dependent loss mechanisms
- Defining physically meaningful baseline expectations for stage temperatures, insertion loss profiles, noise temperatures, and cooldown behaviour
- Identifying physically plausible deviation signatures arising from impedance mismatch, thermal gradients, component degradation, or suboptimal anchoring
- Producing model specifications that bridge physical understanding and engineering implementation
Required Domain Experience
We are specifically looking for candidates who have previously worked with or modelled microwave signal chains inside dilution refrigerators or comparable cryogenic measurement environments.
This role is not suitable for general modelling specialists without prior exposure to cryogenic microwave systems.
Relevant experience includes familiarity with:
- Typical attenuation distributions across temperature stages
- Cryogenic coaxial cable materials and behaviour (NbTi, Nb, CuNi)
- Noise temperature behaviour of cryogenic amplifier chains
- Thermal anchoring strategies for RF components
- Circulators and isolators in mK environments
- VNA measurement interpretation under cryogenic conditions
- Typical RF chain architectures used in superconducting qubit experiments
Candidates should be comfortable reasoning about expected system behaviour without requiring access to a physical cryostat.
Core — Cryogenic Microwave Systems Modelling
Cryogenic modelling of microwave components
S-parameter modelling across temperature gradients
Noise temperature in cryogenic measurement chains
Microwave signal propagation below 4 K
Multi-stage RF chain attenuation vs temperature
Impedance matching across cryogenic stages
Superconducting transmission lines — NbTi, Nb, Al
HEMT amplifier behaviour at 3–4 K
Thermal–RF interaction and self-heating dynamics
VNA measurement interpretation in cryogenic setups
Realistic deviation sources in experimental systems
Theoretical & Computational Physics
Physics-informed analytical model development
Parameter sensitivity & uncertainty analysis
Low-temperature physical mechanisms affecting RF
Open quantum systems concepts (beneficial)
First-principles model derivation
Scientific Computing
Python — NumPy, SciPy
scikit-rf or equivalent RF tools
COMSOL or multiphysics tools (beneficial)
Working with incomplete datasets
Physical models → computational structures
Interested in this role? We'd love to hear from you.
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