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Quandela

Photonic quantum computers and single-photon sources

Cryogenic Integration and Validation Engineer

Hardware Validation & Testing +1Posted on Nov 11
Full-timeNo salary listed

About the Job

Requirements

  • A Master's degree or engineering diploma (Bac+5) in photonics, optics, electronics, mechanical engineering, applied physics, condensed matter physics, or a related field is required; a PhD is appreciated.
  • Practical knowledge of cryogenics and an understanding of low-temperature constraints are required.
  • Knowledge of heat transfer, thermalization, and mechanical constraints in cryogenic environments is required.
  • Ability to assemble and integrate components into cryogenic systems is required.
  • Experience handling and assembling sensitive or delicate components with precision and special care is required.
  • Knowledge of proper component handling, cleanliness, and protection practices during integration is required.
  • Understanding of cryostats and their associated equipment is required.
  • Knowledge of vacuum principles and pumping equipment used for cryogenic applications is required.
  • Ability to commission, cool, and validate systems according to established procedures is required.
  • Ability to perform and validate integration operations using defined protocols, analyze results, and write associated reports is required.
  • Ability to interpret temperature and pressure measurements to analyze system operation is required.
  • Ability to conduct initial technical investigations, analyze observed symptoms, and help identify malfunction causes in collaboration with experts is required.
  • Ability to follow procedures and recognize situations requiring further analysis or expert intervention is required.
  • Ability to track maintenance schedules and completed interventions is required.
  • Ability to read, follow, and write technical procedures and test reports is required.
  • Awareness of hazards associated with cryogenic systems and vacuum equipment is required.
  • Care, precision, procedural rigor, autonomy, initiative, analytical problem-solving, practical aptitude, organization, documentation and traceability, technical curiosity, continuous-improvement orientation, teamwork, communication, and safety awareness are sought.

Responsibilities

  • Prepare cryostats, components, and equipment for integration operations.
  • Precisely handle and assemble sensitive components using methods appropriate to their fragility and integration constraints.
  • Mount and integrate components and subassemblies inside cryostat chambers.
  • Route and secure cables and connections inside cryogenic enclosures while preserving component and connection integrity.
  • Thermalize cables and components while accounting for thermal and mechanical constraints.
  • Ensure integration complies with space, mechanical-interface, material-compatibility, cleanliness, and thermal requirements.
  • Apply appropriate component handling, protection, and inspection practices throughout integration.
  • Inspect and validate integrations according to defined protocols.
  • Analyze inspection results, identify nonconformities, and participate in resolving them.
  • Write validation reports and maintain traceability of completed operations.
  • Identify integration difficulties and propose suitable improvements.
  • Support monitoring and maintenance of cryogenic equipment, including cryostats and associated compressors.
  • Use vacuum and pumping systems needed for cryogenic installations.
  • Analyze system behavior and anomalies, and contribute to identifying corrective actions with relevant technical experts.
  • Provide remote technical support or occasional onsite support for customer systems in France or internationally, as needed.
  • Improve existing documentation and help make operations more robust, repeatable, and suitable for increased production volumes.

Desired Qualifications

  • A PhD is appreciated.

About the Company

Quandela

Photonic quantum computers and single-photon sources

Quandela builds full-stack photonic quantum computers in France, including on-premises MosaiQ hardware and cloud access to its processors. It uses semiconductor quantum-dot single-photon sources to create bright, indistinguishable photons that act as optical qubits, with Perceval, an open-source Python framework, for simulating and programming photonic circuits, and Prometheus, a standalone single-photon source for research labs. The company differentiates itself by offering end-to-end hardware, software, and services—from production in its own facilities to cloud access and an acceleration program that guides clients from use-case exploration to hardware delivery. Its goal is to help clients achieve practical quantum advantages across industries such as cybersecurity, energy, finance, logistics, chemistry, and pharmaceuticals.

Company size
51-200
Company stage
Early VC
Total funding
$91.1M
Headquarters
Massy, France
Founded
2017

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