PsiQuantum’s mission is to build the first useful quantum computers—machines capable of delivering the breakthroughs the field has long promised. Since our founding in 2016, our singular focus has been to build and deploy million-qubit, fault-tolerant quantum systems. 

Quantum computers harness the laws of quantum mechanics to solve problems that even the most advanced supercomputers or AI systems will never reach. Their impact will span energy, pharmaceuticals, finance, agriculture, transportation, materials, and other foundational industries. 

Our architecture and approach is based on silicon photonics. By leveraging the advanced semiconductor manufacturing industry—including partners like GlobalFoundries—we use the same high-volume processes that already produce billions of chips for telecom and consumer electronics. Photonics offers natural advantages for scale: photons don’t feel heat, are immune to electromagnetic interference, and integrate with existing cryogenic cooling and standard fiber-optic infrastructure. 

In 2024, PsiQuantum announced government-funded projects to support the build-out of our first utility-scale quantum computers in Brisbane, Australia, and Chicago, Illinois. These initiatives reflect a growing recognition that quantum computing will be strategically and economically defining—and that now is the time to scale. 

PsiQuantum also develops the algorithms and software needed to make these systems commercially valuable. Our application, software, and industry teams work directly with leading Fortune 500 companies—including Lockheed Martin, Mercedes-Benz, Boehringer Ingelheim, and Mitsubishi Chemical—to prepare quantum solutions for real-world impact. 

Quantum computing is not an extension of classical computing. It represents a fundamental shift—and a path to mastering challenges that cannot be solved any other way. The potential is enormous, and we have a clear path to make it real. 

Come join us. 

Job Summary:

We are seeking a Senior Optical Fibre Engineer to develop and evaluate advanced optical fibre for high-performance optical systems. This role combines optical modelling, deep understanding of advanced speciality optical fibre behaviour and design tradeoffs, and hands-on experimental validation, including the measurement and verification of key fibre properties. The successful candidate will work with internal teams with diverse technical expertise, and external partners, to translate performance requirements into practical technical direction for advanced fibre technologies. We welcome candidates from both advanced industrial photonics environments and leading research groups who combine strong physical intuition with practical experimental and engineering judgement.

Responsibilities:

• Use simulation and analytical tools to evaluate the behaviour and performance of advanced fibre designs and fibre-based optical systems.
• Assess modal properties, loss mechanisms, dispersion, coupling, and other key fibre characteristics relevant to demanding optical applications.
• Design and execute experiments to measure, verify, and interpret fibre properties and subsystem performance.
• Correlate simulation and experimental results to build understanding, validate assumptions, and guide development decisions.
• Work closely with external development partners to assess technical options, review results, and help steer fibre design and performance tradeoffs.
• Translate system or subsystem requirements into meaningful fibre performance targets and evaluation criteria.
• Collaborate across photonics, systems, and experimental teams to support integration of advanced fibre technologies into larger optical platforms.
• Contribute technical judgement to the down-selection, maturation, and validation of advanced fibre solutions

Experience/Qualifications:

Required

• PhD in photonics, optics, physics, engineering, or a related field, or equivalent industry experience.
• Significant experience in fibre optics, guided-wave photonics, or optical system development.
• Strong understanding of advanced and specialty optical fibre behaviour, including relevant modal, loss, dispersion, and coupling tradeoffs.
• Experience with optical simulation tools such as FDTD or related electromagnetic, waveguide, or propagation modelling methods.
• Ability to use simulation to guide practical design decisions and interpret behaviour in non-standard fibre systems.
• Hands-on experience designing and executing experiments to characterize optical or fibre properties.
• Experience analysing and reconciling modelling and experimental data.
• Ability to operate effectively in a hands-on R&D environment with a high degree of technical independence.
• Strong communication skills and ability to work productively with internal teams and external technical partners

Preferred

• Experience with advanced or specialty fibre platforms.
• Experience working closely with fibre development, fabrication, or research groups.
• Experience in both modelling and experimental verification of fibre or waveguide performance.
• Familiarity with demanding optical system environments where specific parameters, such as low loss take priority in trade-off scenarios.
• Experience translating early-stage optical concepts into robust experimental or engineering outcomes.

PsiQuantum provides equal employment opportunity for all applicants and employees. PsiQuantum does not unlawfully discriminate on the basis of race, color, religion, sex (including pregnancy, childbirth, or related medical conditions), gender identity, gender expression, national origin, ancestry, citizenship, age, physical or mental disability, military or veteran status, marital status, domestic partner status, sexual orientation, genetic information, or any other basis protected by applicable laws.

Note: PsiQuantum will only reach out to you using an official PsiQuantum email address and will never ask you for bank account information as part of the interview process. Please report any suspicious activity to recruiting@psiquantum.com.

We are not accepting unsolicited resumes from employment agencies.

PsiQuantum’s mission is to build the first useful quantum computers—machines capable of delivering the breakthroughs the field has long promised. Since our founding in 2016, our singular focus has been to build and deploy million-qubit, fault-tolerant quantum systems. 

Quantum computers harness the laws of quantum mechanics to solve problems that even the most advanced supercomputers or AI systems will never reach. Their impact will span energy, pharmaceuticals, finance, agriculture, transportation, materials, and other foundational industries. 

Our architecture and approach is based on silicon photonics. By leveraging the advanced semiconductor manufacturing industry—including partners like GlobalFoundries—we use the same high-volume processes that already produce billions of chips for telecom and consumer electronics. Photonics offers natural advantages for scale: photons don’t feel heat, are immune to electromagnetic interference, and integrate with existing cryogenic cooling and standard fiber-optic infrastructure. 

In 2024, PsiQuantum announced government-funded projects to support the build-out of our first utility-scale quantum computers in Brisbane, Australia, and Chicago, Illinois. These initiatives reflect a growing recognition that quantum computing will be strategically and economically defining—and that now is the time to scale. 

PsiQuantum also develops the algorithms and software needed to make these systems commercially valuable. Our application, software, and industry teams work directly with leading Fortune 500 companies—including Lockheed Martin, Mercedes-Benz, Boehringer Ingelheim, and Mitsubishi Chemical—to prepare quantum solutions for real-world impact. 

Quantum computing is not an extension of classical computing. It represents a fundamental shift—and a path to mastering challenges that cannot be solved any other way. The potential is enormous, and we have a clear path to make it real. 

Come join us. 

Job Summary:

PsiQuantum is seeking a Quantum Electronics Engineer to support the development of advanced electronic and electro-optic systems for quantum computing.

In this role, you will work closely with senior engineers to design and implement high-performance electronic solutions for controlling and reading out quantum photonic hardware. This includes RF design, electro-optic modulation, and low-latency control systems.

Responsibilities:

• Design and develop RF and high-speed electronic systems for quantum hardware applications.
• Support the design of electro-optic (EO) packages and modulator driving electronics.
• Develop low-latency electronic solutions for quantum system control and readout.
• Work on readout systems for superconducting nanowire single-photon detectors (SNSPDs).
• Collaborate with photonics and quantum teams to integrate electronics with optical systems.
• Assist in FPGA-based system design and implementation for control and data acquisition.
• Participate in debugging and optimization of complex quantum hardware systems.

Experience/Qualifications:

• Degree (PhD or equivalent experience) in Electrical Engineering, Physics, or a related field.
• Strong background in RF and high-speed electronic design.
• Experience working with electro-optic systems or photonic hardware.
• Understanding of signal integrity, noise, and timing in high-performance systems.
• Hands-on laboratory experience with electronic test and measurement equipment.

Desired Skills:

• Experience designing electronics for quantum or cryogenic systems.
• Familiarity with FPGA development and programming.
• Knowledge of superconducting nanowire detectors and readout electronics.
• Experience with low-latency system design and high-speed data acquisition.
• Experience with ASIC design or collaboration with ASIC development teams for high-speed or low-latency electronic systems.

PsiQuantum provides equal employment opportunity for all applicants and employees. PsiQuantum does not unlawfully discriminate on the basis of race, color, religion, sex (including pregnancy, childbirth, or related medical conditions), gender identity, gender expression, national origin, ancestry, citizenship, age, physical or mental disability, military or veteran status, marital status, domestic partner status, sexual orientation, genetic information, or any other basis protected by applicable laws.

Note: PsiQuantum will only reach out to you using an official PsiQuantum email address and will never ask you for bank account information as part of the interview process. Please report any suspicious activity to recruiting@psiquantum.com.

We are not accepting unsolicited resumes from employment agencies.

PsiQuantum’s mission is to build the first useful quantum computers—machines capable of delivering the breakthroughs the field has long promised. Since our founding in 2016, our singular focus has been to build and deploy million-qubit, fault-tolerant quantum systems. 

Quantum computers harness the laws of quantum mechanics to solve problems that even the most advanced supercomputers or AI systems will never reach. Their impact will span energy, pharmaceuticals, finance, agriculture, transportation, materials, and other foundational industries. 

Our architecture and approach is based on silicon photonics. By leveraging the advanced semiconductor manufacturing industry—including partners like GlobalFoundries—we use the same high-volume processes that already produce billions of chips for telecom and consumer electronics. Photonics offers natural advantages for scale: photons don’t feel heat, are immune to electromagnetic interference, and integrate with existing cryogenic cooling and standard fiber-optic infrastructure. 

In 2024, PsiQuantum announced government-funded projects to support the build-out of our first utility-scale quantum computers in Brisbane, Australia, and Chicago, Illinois. These initiatives reflect a growing recognition that quantum computing will be strategically and economically defining—and that now is the time to scale. 

PsiQuantum also develops the algorithms and software needed to make these systems commercially valuable. Our application, software, and industry teams work directly with leading Fortune 500 companies—including Lockheed Martin, Mercedes-Benz, Boehringer Ingelheim, and Mitsubishi Chemical—to prepare quantum solutions for real-world impact. 

Quantum computing is not an extension of classical computing. It represents a fundamental shift—and a path to mastering challenges that cannot be solved any other way. The potential is enormous, and we have a clear path to make it real. 

Come join us. 

Job Summary:

PsiQuantum is looking for a Quantum Systems Engineer to design, build, and validate quantum subsystems for our photonic quantum computing platform.

This role focuses on implementing and testing key quantum optical experiments and subsystems, contributing directly to the realization of fault-tolerant quantum computation. You will work across disciplines to integrate and validate system-level performance.

Responsibilities:

• Design, build, and test quantum photonic subsystems and experiments.
• Implement and analyse quantum interference experiments, including Hong-Ou-Mandel measurements.
• Develop and validate systems involving single-photon sources and detectors.
• Perform time-tagged measurements and analyse photon correlation data.
• Contribute to the development and testing of entangling circuits and quantum state preparation.
• Collaborate with cross-functional teams to integrate subsystems into larger quantum architectures.
• Debug complex experimental systems and identify performance limitations.
• Document and communicate experimental results to inform system design improvements.

Experience/Qualifications:

• PhD in Quantum Physics, Quantum Optics, or a related discipline.
• Strong experimental experience in quantum optics or photonic quantum systems.
• Hands-on experience with Hong-Ou-Mandel interference and related quantum optics experiments.
• Familiarity with single-photon sources, detectors, and time-tagging techniques.
• Strong data analysis and experimental design skills.

Desired Skills:

• Experience with entangling circuits and single-qubit readout techniques.
• Knowledge of quantum information concepts and photonic quantum architectures.
• Experience with experimental automation and data processing (e.g., Python).
• Ability to work effectively in cross-disciplinary teams.

PsiQuantum provides equal employment opportunity for all applicants and employees. PsiQuantum does not unlawfully discriminate on the basis of race, color, religion, sex (including pregnancy, childbirth, or related medical conditions), gender identity, gender expression, national origin, ancestry, citizenship, age, physical or mental disability, military or veteran status, marital status, domestic partner status, sexual orientation, genetic information, or any other basis protected by applicable laws.

Note: PsiQuantum will only reach out to you using an official PsiQuantum email address and will never ask you for bank account information as part of the interview process. Please report any suspicious activity to recruiting@psiquantum.com.

We are not accepting unsolicited resumes from employment agencies.

PsiQuantum’s mission is to build the first useful quantum computers—machines capable of delivering the breakthroughs the field has long promised. Since our founding in 2016, our singular focus has been to build and deploy million-qubit, fault-tolerant quantum systems. 

Quantum computers harness the laws of quantum mechanics to solve problems that even the most advanced supercomputers or AI systems will never reach. Their impact will span energy, pharmaceuticals, finance, agriculture, transportation, materials, and other foundational industries. 

Our architecture and approach is based on silicon photonics. By leveraging the advanced semiconductor manufacturing industry—including partners like GlobalFoundries—we use the same high-volume processes that already produce billions of chips for telecom and consumer electronics. Photonics offers natural advantages for scale: photons don’t feel heat, are immune to electromagnetic interference, and integrate with existing cryogenic cooling and standard fiber-optic infrastructure. 

In 2024, PsiQuantum announced government-funded projects to support the build-out of our first utility-scale quantum computers in Brisbane, Australia, and Chicago, Illinois. These initiatives reflect a growing recognition that quantum computing will be strategically and economically defining—and that now is the time to scale. 

PsiQuantum also develops the algorithms and software needed to make these systems commercially valuable. Our application, software, and industry teams work directly with leading Fortune 500 companies—including Lockheed Martin, Mercedes-Benz, Boehringer Ingelheim, and Mitsubishi Chemical—to prepare quantum solutions for real-world impact. 

Quantum computing is not an extension of classical computing. It represents a fundamental shift—and a path to mastering challenges that cannot be solved any other way. The potential is enormous, and we have a clear path to make it real. 

Come join us. 

Job Summary:

PsiQuantum is seeking an Integrated Photonics Engineer to support the characterization and validation of advanced photonic circuits underpinning our quantum computing platform.

In this role, you will design and execute experiments to test complex optical circuits, working closely with circuit designers and system engineers. You will play a key role in developing automated experimental workflows and advancing our understanding of integrated photonic devices.

Responsibilities:

• Design and execute experiments to characterize integrated photonic circuits across multiple optical wavelengths.
• Test and analyse devices incorporating components such as directional couplers, interferometers, and EO modulators.
• Develop automated experimental control and data acquisition systems (Python preferred).
• Characterize complex integrated optics-based circuits and interpret experimental results.
• Collaborate with design teams to troubleshoot device performance and improve future iterations.
• Generate detailed reports and documentation for experimental procedures and results.
• Contribute to the development of scalable testing methodologies for large-scale photonic systems.

Experience/Qualifications:

• PhD in Photonics, Physics, Electrical Engineering, or a related field.
• Strong experimental background in integrated optics and photonic circuit characterization.
• Hands-on experience with key components such as directional couplers, interferometers (MZI/AMZI), and phase shifters.
• Proficiency in Python for experiment automation and data analysis.
• Experience working with complex optical measurement setups.

Desired Skills:

• Industry experience in photonics or semiconductor device testing.
• Familiarity with electro-optic and thermo-optic tuning mechanisms.
• Experience with wafer-scale or high-throughput photonic testing.
• Knowledge of quantum optics or photonic quantum systems.

PsiQuantum provides equal employment opportunity for all applicants and employees. PsiQuantum does not unlawfully discriminate on the basis of race, color, religion, sex (including pregnancy, childbirth, or related medical conditions), gender identity, gender expression, national origin, ancestry, citizenship, age, physical or mental disability, military or veteran status, marital status, domestic partner status, sexual orientation, genetic information, or any other basis protected by applicable laws.

Note: PsiQuantum will only reach out to you using an official PsiQuantum email address and will never ask you for bank account information as part of the interview process. Please report any suspicious activity to recruiting@psiquantum.com.

We are not accepting unsolicited resumes from employment agencies.

PsiQuantum’s mission is to build the first useful quantum computers—machines capable of delivering the breakthroughs the field has long promised. Since our founding in 2016, our singular focus has been to build and deploy million-qubit, fault-tolerant quantum systems. 

Quantum computers harness the laws of quantum mechanics to solve problems that even the most advanced supercomputers or AI systems will never reach. Their impact will span energy, pharmaceuticals, finance, agriculture, transportation, materials, and other foundational industries. 

Our architecture and approach is based on silicon photonics. By leveraging the advanced semiconductor manufacturing industry—including partners like GlobalFoundries—we use the same high-volume processes that already produce billions of chips for telecom and consumer electronics. Photonics offers natural advantages for scale: photons don’t feel heat, are immune to electromagnetic interference, and integrate with existing cryogenic cooling and standard fiber-optic infrastructure. 

In 2024, PsiQuantum announced government-funded projects to support the build-out of our first utility-scale quantum computers in Brisbane, Australia, and Chicago, Illinois. These initiatives reflect a growing recognition that quantum computing will be strategically and economically defining—and that now is the time to scale. 

PsiQuantum also develops the algorithms and software needed to make these systems commercially valuable. Our application, software, and industry teams work directly with leading Fortune 500 companies—including Lockheed Martin, Mercedes-Benz, Boehringer Ingelheim, and Mitsubishi Chemical—to prepare quantum solutions for real-world impact. 

Quantum computing is not an extension of classical computing. It represents a fundamental shift—and a path to mastering challenges that cannot be solved any other way. The potential is enormous, and we have a clear path to make it real. 

Come join us. 

Job Summary:

PsiQuantum is building the world’s first fault-tolerant quantum computer, enabled by large-scale photonic integration. We are seeking an Optical Packaging & Assembly Engineer to join our UK R&D facility at Daresbury Laboratory.

In this role, you will work closely with a senior engineer to rapidly develop and prototype next-generation optical packaging solutions for photonic integrated circuits (PICs). You will collaborate across mechanical, electronic, and quantum hardware teams to enable the assembly and testing of cutting-edge optical quantum computing systems.

Responsibilities:

• Support the design and rapid prototyping of optical packaging solutions for PIC-based quantum hardware.
• Develop and implement fibre-to-chip alignment and attachment processes for high-performance optical coupling.
• Assist in the design of scalable packaging architectures, working alongside senior engineers.
• Collaborate with mechanical and electronic engineers to ensure integrated, manufacturable designs.
• Work closely with quantum physicists to support the build and testing of optical quantum systems.
• Contribute to the development of assembly workflows, processes, and documentation.
• Support component selection, procurement, and BOM development for prototype builds.
• Analyse experimental results and provide feedback to improve packaging performance and robustness.

Experience/Qualifications:

• PhD in Physics, Engineering, or a related discipline (or equivalent experience).
• Hands-on experience with optical assembly, fibre alignment, or opto-mechanical systems.
• Familiarity with photonic integrated circuits and optical packaging techniques.
• Experience working in a laboratory environment supporting experimental hardware development.
• Strong problem-solving skills and ability to work in a fast-paced R&D setting.

Desired Skills:

• Experience with fibre arrays, optical connectors, or precision alignment systems.
• Knowledge of DFM principles for optical packaging.
• Experience working in cross-functional engineering teams.
• Familiarity with optical measurement and characterization techniques.

PsiQuantum provides equal employment opportunity for all applicants and employees. PsiQuantum does not unlawfully discriminate on the basis of race, color, religion, sex (including pregnancy, childbirth, or related medical conditions), gender identity, gender expression, national origin, ancestry, citizenship, age, physical or mental disability, military or veteran status, marital status, domestic partner status, sexual orientation, genetic information, or any other basis protected by applicable laws.

Note: PsiQuantum will only reach out to you using an official PsiQuantum email address and will never ask you for bank account information as part of the interview process. Please report any suspicious activity to recruiting@psiquantum.com.

We are not accepting unsolicited resumes from employment agencies.

PsiQuantum’s mission is to build the first useful quantum computers—machines capable of delivering the breakthroughs the field has long promised. Since our founding in 2016, our singular focus has been to build and deploy million-qubit, fault-tolerant quantum systems. 

Quantum computers harness the laws of quantum mechanics to solve problems that even the most advanced supercomputers or AI systems will never reach. Their impact will span energy, pharmaceuticals, finance, agriculture, transportation, materials, and other foundational industries. 

Our architecture and approach is based on silicon photonics. By leveraging the advanced semiconductor manufacturing industry—including partners like GlobalFoundries—we use the same high-volume processes that already produce billions of chips for telecom and consumer electronics. Photonics offers natural advantages for scale: photons don’t feel heat, are immune to electromagnetic interference, and integrate with existing cryogenic cooling and standard fiber-optic infrastructure. 

In 2024, PsiQuantum announced government-funded projects to support the build-out of our first utility-scale quantum computers in Brisbane, Australia, and Chicago, Illinois. These initiatives reflect a growing recognition that quantum computing will be strategically and economically defining—and that now is the time to scale. 

PsiQuantum also develops the algorithms and software needed to make these systems commercially valuable. Our application, software, and industry teams work directly with leading Fortune 500 companies—including Lockheed Martin, Mercedes-Benz, Boehringer Ingelheim, and Mitsubishi Chemical—to prepare quantum solutions for real-world impact. 

Quantum computing is not an extension of classical computing. It represents a fundamental shift—and a path to mastering challenges that cannot be solved any other way. The potential is enormous, and we have a clear path to make it real. 

Come join us. 

Job Summary:

We are seeking a Senior Photonics Engineer to develop ultra-low-loss optical interface solutions between dissimilar, exploratory, waveguiding platforms. This role combines device concept development, optical simulation, and hands-on experimental validation to assess and mature new approaches for mode conversion and coupling. The successful candidate will combine creativity in photonic device design with strong engineering judgement, identifying solutions that are both high-performing and practical to deploy. Working closely with internal teams and expert external partners, they will help guide the development of advanced optical interfaces. We welcome applicants from both advanced industrial photonics environments and leading research groups who combine strong physical intuition with practical experimental and engineering judgement.

Responsibilities:

Experience/Qualifications:

Required

• PhD degree in photonics, optics, physics, engineering, or a related discipline, or equivalent practical experience.
• Significant experience in photonic device development, guided-wave optics, optical coupling, or integrated optical interface design.
• Strong understanding of mode conversion, mode control, and optical coupling between dissimilar waveguiding or photonic platforms.
• Experience with simulation tools such as BeamPROP, FDTD, eigenmode, BPM, or related methods for analysing propagation, modal behaviour, and coupling performance.
• Proven ability to use simulation to guide device design choices and interpret behaviour in complex optical interfaces.
• Hands-on experience designing and executing experiments to characterize optical coupling, insertion loss, and device performance.
• Strong experimental judgement and ability to troubleshoot complex photonic or optical measurements.
• Ability to assess technical feasibility while keeping practical implementation constraints in view.
• Strong communication skills and ability to work effectively with internal teams and external technical partners

Preferred

• Experience developing low-loss optical interface devices between fibre, waveguide, or integrated photonic platforms.
• Experience with advanced optical packaging, taper-based transitions, or coupling structures.
• Experience with optimisation methods or inverse design for photonic structures.
• Experience taking photonic device concepts from early-stage exploration through experimental proof of concept.
• Experience balancing innovation, performance, and manufacturability in photonic device development.
• Experience in advanced industrial photonics environments or high performing applied research groups.

PsiQuantum provides equal employment opportunity for all applicants and employees. PsiQuantum does not unlawfully discriminate on the basis of race, color, religion, sex (including pregnancy, childbirth, or related medical conditions), gender identity, gender expression, national origin, ancestry, citizenship, age, physical or mental disability, military or veteran status, marital status, domestic partner status, sexual orientation, genetic information, or any other basis protected by applicable laws.

Note: PsiQuantum will only reach out to you using an official PsiQuantum email address and will never ask you for bank account information as part of the interview process. Please report any suspicious activity to recruiting@psiquantum.com.

We are not accepting unsolicited resumes from employment agencies.

PsiQuantum’s mission is to build the first useful quantum computers—machines capable of delivering the breakthroughs the field has long promised. Since our founding in 2016, our singular focus has been to build and deploy million-qubit, fault-tolerant quantum systems. 

Quantum computers harness the laws of quantum mechanics to solve problems that even the most advanced supercomputers or AI systems will never reach. Their impact will span energy, pharmaceuticals, finance, agriculture, transportation, materials, and other foundational industries. 

Our architecture and approach is based on silicon photonics. By leveraging the advanced semiconductor manufacturing industry—including partners like GlobalFoundries—we use the same high-volume processes that already produce billions of chips for telecom and consumer electronics. Photonics offers natural advantages for scale: photons don’t feel heat, are immune to electromagnetic interference, and integrate with existing cryogenic cooling and standard fiber-optic infrastructure. 

In 2024, PsiQuantum announced government-funded projects to support the build-out of our first utility-scale quantum computers in Brisbane, Australia, and Chicago, Illinois. These initiatives reflect a growing recognition that quantum computing will be strategically and economically defining—and that now is the time to scale. 

PsiQuantum also develops the algorithms and software needed to make these systems commercially valuable. Our application, software, and industry teams work directly with leading Fortune 500 companies—including Lockheed Martin, Mercedes-Benz, Boehringer Ingelheim, and Mitsubishi Chemical—to prepare quantum solutions for real-world impact. 

Quantum computing is not an extension of classical computing. It represents a fundamental shift—and a path to mastering challenges that cannot be solved any other way. The potential is enormous, and we have a clear path to make it real. 

Come join us. 

Job Summary:

We are looking for enthusiastic candidates interested in applying quantum computing to real-world challenges. At PsiQuantum, we are particularly focused on use cases of quantum computing in chemistry, drug design, materials science, and fluid dynamics. Along these lines, we are offering internships in the areas of quantum algorithms and quantum compilation.

Your work could entail the - 

• Development of quantum algorithms to solve impactful problems,
• Optimization of ubiquitous subroutines in fault tolerant quantum algorithms,
• Compilation of quantum algorithms to logical gate sets,
• Incorporation of architecture-aware optimizations,
• Estimation of quantum resources.

Prior work in the field of fault tolerant quantum algorithms and compilation is preferred, but enthusiasm for quantum computing is essential.

Desired experience and skills:

• Currently studying for, or completed a postgraduate degree related to quantum algorithms, quantum circuit compilation, fault tolerance or another aspect of quantum computing OR 5+ years working professionally in one or more of these fields. 
• Experience with programming languages (e.g. Python) and collaborative software development tools (e.g. Git).
• A creative and adaptable approach to problem solving.
• Ability to work effectively in a highly collaborative team. 

PsiQuantum provides equal employment opportunity for all applicants and employees. PsiQuantum does not unlawfully discriminate on the basis of race, color, religion, sex (including pregnancy, childbirth, or related medical conditions), gender identity, gender expression, national origin, ancestry, citizenship, age, physical or mental disability, military or veteran status, marital status, domestic partner status, sexual orientation, genetic information, or any other basis protected by applicable laws.

Note: PsiQuantum will only reach out to you using an official PsiQuantum email address and will never ask you for bank account information as part of the interview process. Please report any suspicious activity to recruiting@psiquantum.com.

We are not accepting unsolicited resumes from employment agencies.

PsiQuantum’s mission is to build the first useful quantum computers—machines capable of delivering the breakthroughs the field has long promised. Since our founding in 2016, our singular focus has been to build and deploy million-qubit, fault-tolerant quantum systems. 

Quantum computers harness the laws of quantum mechanics to solve problems that even the most advanced supercomputers or AI systems will never reach. Their impact will span energy, pharmaceuticals, finance, agriculture, transportation, materials, and other foundational industries. 

Our architecture and approach is based on silicon photonics. By leveraging the advanced semiconductor manufacturing industry—including partners like GlobalFoundries—we use the same high-volume processes that already produce billions of chips for telecom and consumer electronics. Photonics offers natural advantages for scale: photons don’t feel heat, are immune to electromagnetic interference, and integrate with existing cryogenic cooling and standard fiber-optic infrastructure. 

In 2024, PsiQuantum announced government-funded projects to support the build-out of our first utility-scale quantum computers in Brisbane, Australia, and Chicago, Illinois. These initiatives reflect a growing recognition that quantum computing will be strategically and economically defining—and that now is the time to scale. 

PsiQuantum also develops the algorithms and software needed to make these systems commercially valuable. Our application, software, and industry teams work directly with leading Fortune 500 companies—including Lockheed Martin, Mercedes-Benz, Boehringer Ingelheim, and Mitsubishi Chemical—to prepare quantum solutions for real-world impact. 

Quantum computing is not an extension of classical computing. It represents a fundamental shift—and a path to mastering challenges that cannot be solved any other way. The potential is enormous, and we have a clear path to make it real. 

Come join us. 

Job Summary:

We are seeking an experienced engineer to lead end to end design, build and test of hardware to maximise the thermal efficiency of our quantum computing cryomodules, in particular, those working at cryogenic temperatures (2K to 80K range). In addition to full life cycle mechanical engineering development, this person would have experience in design for manufacture, cost engineering and ideally project management skills.

This role will be based at our UK site in Daresbury, with some travel ~10% of their time expected visiting HQ in the USA or our supply chain partners globally.

Responsibilities:

• Design of cryogenic assemblies and cryostat sub-systems to improve overall machine efficiency and/or reduce capital cost of the equipment (DfM).
• Calculations and Finite Element Analyses to inform DfM work.
• Design test setups and perform experiments to close models.
• Produce manufacturing/assembly drawings.
• Co-ordinate with Systems team in USA to move from R&D prototypes into production.
• Work with supply chain partners to optimise production cost/schedule/quality.
• Cryogenic performance vs cost analyses.

Experience/Qualifications:

Required Skills & Experience:

• Degree qualified.
• At least 8 years experience (to be considered for Senior level**) in a similar role within a scientific or advanced engineering environment.
• Demonstrable enthusiasm, knowledge and skill in the fields of cryogenic hardware design and mechanical engineering.
• Project or Systems Management experience.
• Design for Manufacture experience/cost engineering.
• Experience developing thermo-mechanical test setups and procedures.
• Experience working within multidisciplinary teams.
• Effective communication and interpersonal skills to collaborate with various teams and external stakeholders.
• Enjoys solving difficult problems.
• Exceptional organizational skills and the ability to handle multiple tasks simultaneously

Preferred Skills & Experience:

• Experience designing cryogenic systems.
• Experience operating cryogenic systems.
• Experience in the production of manufacturing drawings.
• Strong mechanical design and analysis skills, expertise in GD&T.
• Generating & maintaining bills of materials.
• Generating & maintaining a Specification Tree.
• Experience in tolerance analysis and how this affects thermo-mechanical performance.

We are open to considering all levels of experience**

PsiQuantum provides equal employment opportunity for all applicants and employees. PsiQuantum does not unlawfully discriminate on the basis of race, color, religion, sex (including pregnancy, childbirth, or related medical conditions), gender identity, gender expression, national origin, ancestry, citizenship, age, physical or mental disability, military or veteran status, marital status, domestic partner status, sexual orientation, genetic information, or any other basis protected by applicable laws.

Note: PsiQuantum will only reach out to you using an official PsiQuantum email address and will never ask you for bank account information as part of the interview process. Please report any suspicious activity to recruiting@psiquantum.com.

We are not accepting unsolicited resumes from employment agencies.

****Must reside in or be willing to relocate to the U.K.******

PsiQuantum’s mission is to build the first useful quantum computers—machines capable of delivering the breakthroughs the field has long promised. Since our founding in 2016, our singular focus has been to build and deploy million-qubit, fault-tolerant quantum systems. 

Quantum computers harness the laws of quantum mechanics to solve problems that even the most advanced supercomputers or AI systems will never reach. Their impact will span energy, pharmaceuticals, finance, agriculture, transportation, materials, and other foundational industries. 

Our architecture and approach is based on silicon photonics. By leveraging the advanced semiconductor manufacturing industry—including partners like GlobalFoundries—we use the same high-volume processes that already produce billions of chips for telecom and consumer electronics. Photonics offers natural advantages for scale: photons don’t feel heat, are immune to electromagnetic interference, and integrate with existing cryogenic cooling and standard fiber-optic infrastructure. 

In 2024, PsiQuantum announced government-funded projects to support the build-out of our first utility-scale quantum computers in Brisbane, Australia, and Chicago, Illinois. These initiatives reflect a growing recognition that quantum computing will be strategically and economically defining—and that now is the time to scale. 

PsiQuantum also develops the algorithms and software needed to make these systems commercially valuable. Our application, software, and industry teams work directly with leading Fortune 500 companies—including Lockheed Martin, Mercedes-Benz, Boehringer Ingelheim, and Mitsubishi Chemical—to prepare quantum solutions for real-world impact. 

Quantum computing is not an extension of classical computing. It represents a fundamental shift—and a path to mastering challenges that cannot be solved any other way. The potential is enormous, and we have a clear path to make it real. 

Come join us. 

Job Summary:

Want to be at the forefront of using theoretical and computational chemistry, physics, and materials science to maximize the impact of quantum algorithms and fault tolerant quantum computing (FTQC) in generating exact and useful quantum data for a wide range of industrial applications? As a Computational Quantum Chemist, you will develop and apply advanced electronic-structure and quantum-chemistry methods at the interface of quantum computing and molecular and materials modeling. You will work within an interdisciplinary research team to advance methodologies for correlated electronic systems and embedding, with an emphasis on enabling and evaluating quantum-computing-based workflows.

Within PsiQuantum’s Application Development team, you will integrate and develop computational chemistry approaches alongside emerging quantum algorithms and high-performance computing (HPC), collaborating closely with quantum algorithm researchers and domain experts. Your work will connect quantum-computed atomic and molecular properties with higher-level materials and chemical behavior through rigorous computational modeling. These efforts will support innovations in applied fields such as energy materials, superconductors, batteries, drug design, and catalysis, among others.

This role offers the opportunity to conduct publishable research, build robust computational workflows, and contribute to interdisciplinary efforts across computational chemistry, materials science, and quantum computing.

Responsibilities:

• Conduct theoretical and computational research in electronic-structure theory and quantum chemistry, including literature analysis, method development, and problem solving.
• Design, develop, and evaluate computational workflows that integrate established electronic-structure methods with emerging quantum-computing-based approaches.
• Collaborate with quantum algorithm researchers to identify and assess areas where quantum computing can provide value for electronic-structure and materials-chemistry problems.
• Apply expertise in conventional (non-quantum-computing) algorithms to support the development, benchmarking, and validation of quantum algorithms.
• Develop computational workflows that combine best-in-class classical approaches (e.g., HPC and GPU acceleration) with FTQC for quantum chemistry and materials modeling.
• Serve as a subject matter expert in computational quantum chemistry and electronic-structure methods, staying current with relevant literature, tools, and methodologies.
• Participate in scientific collaboration and technical discussions across teams to support shared research objectives.
• Document research progress and contribute to internal reports, technical documentation, and publications.

Experience/Qualifications:

• Ph.D. in computational or theoretical chemistry, physics, or a closely related field with a strong emphasis on electronic-structure and computational chemistry methodology development.
• Strong foundational knowledge in electronic-structure theory, including density functional theory (DFT) and/or wave function-based quantum chemistry methods, with experience applying these approaches to molecular or materials systems.
• Experience working in high-performance computing (HPC) environments for electronic-structure or atomistic simulations.
• Ability to work effectively in a collaborative, interdisciplinary research environment spanning physics, chemistry, materials science, machine learning, and quantum computing.
• Proficiency in scientific programming and algorithm development, with experience in either Python, Fortran, or C++.
• Strong track record of peer-reviewed publications. 

Preferred:

• Experience with advanced electronic-structure or quantum-chemistry method development, including extensions or improvements to existing theoretical frameworks (e.g., DFT functional development).
• Deep understanding of or hands-on experience with machine learning and data-driven techniques applied to electronic structure, quantum chemistry, or materials modeling problems.
• Experience with quantum embedding or multiscale electronic-structure approaches for treating strongly correlated or localized electronic effects.
• Experience constructing or working with localized orbital representations, effective subspaces, or reduced electronic models derived from first-principles calculations.
• Advanced knowledge and hands-on experience with multireference or strongly correlated electronic-structure methods, such as coupled-cluster, configuration interaction, tensor-network, or related approaches.
• Experience applying or evaluating quantum-computing algorithms for electronic-structure, chemistry, or materials-science applications.
• Experience with GPU-accelerated method development or performance optimization for scientific computing applications.
• Experience developing, extending, or contributing to large-scale scientific software for electronic-structure, quantum chemistry, or materials modeling.

PsiQuantum provides equal employment opportunity for all applicants and employees. PsiQuantum does not unlawfully discriminate on the basis of race, color, religion, sex (including pregnancy, childbirth, or related medical conditions), gender identity, gender expression, national origin, ancestry, citizenship, age, physical or mental disability, military or veteran status, marital status, domestic partner status, sexual orientation, genetic information, or any other basis protected by applicable laws.

Note: PsiQuantum will only reach out to you using an official PsiQuantum email address and will never ask you for bank account information as part of the interview process. Please report any suspicious activity to recruiting@psiquantum.com.

We are not accepting unsolicited resumes from employment agencies.

PsiQuantum’s mission is to build the first useful quantum computers—machines capable of delivering the breakthroughs the field has long promised. Since our founding in 2016, our singular focus has been to build and deploy million-qubit, fault-tolerant quantum systems. 

Quantum computers harness the laws of quantum mechanics to solve problems that even the most advanced supercomputers or AI systems will never reach. Their impact will span energy, pharmaceuticals, finance, agriculture, transportation, materials, and other foundational industries. 

Our architecture and approach is based on silicon photonics. By leveraging the advanced semiconductor manufacturing industry—including partners like GlobalFoundries—we use the same high-volume processes that already produce billions of chips for telecom and consumer electronics. Photonics offers natural advantages for scale: photons don’t feel heat, are immune to electromagnetic interference, and integrate with existing cryogenic cooling and standard fiber-optic infrastructure. 

In 2024, PsiQuantum announced government-funded projects to support the build-out of our first utility-scale quantum computers in Brisbane, Australia, and Chicago, Illinois. These initiatives reflect a growing recognition that quantum computing will be strategically and economically defining—and that now is the time to scale. 

PsiQuantum also develops the algorithms and software needed to make these systems commercially valuable. Our application, software, and industry teams work directly with leading Fortune 500 companies—including Lockheed Martin, Mercedes-Benz, Boehringer Ingelheim, and Mitsubishi Chemical—to prepare quantum solutions for real-world impact. 

Quantum computing is not an extension of classical computing. It represents a fundamental shift—and a path to mastering challenges that cannot be solved any other way. The potential is enormous, and we have a clear path to make it real. 

Come join us. 

Job Summary:

The Senior Optical Packaging Engineer is responsible for developing & implementing high-performance, robust & scalable opto-electronic packaging workflows for a variety of chip-based photonic integrated circuits. This work will be carried out in PsiQuantum’s UK R&D facility located in Daresbury Lab.

Responsibilities:

• Develop an optical package and fibre-to-chip alignment scheme that allows for high alignment accuracy and scalable assembly.
• Help develop packaging prototypes & scalable fibre-to-chip packaging flows and processes.
• Review packaging design BOMs, work with supply chain on procuring parts needed for assembly.
• Work with our internal packaging team and external vendors on transferring & scaling packaging designs and processes based on successful prototypes.
• Work with external vendors and suppliers to source required materials and provide feedback on evolving requirements. 
• Working with external partners to develop advanced opto-electronic packaging solutions.

Experience/Qualifications:

• Master’s Degree or above in Optical Engineering, Physics or equivalent.
• 3+ years of experience working on PIC packaging design & qualification.
• 5+ years of experience working with optical fibers, optical measurements.
• 3+ years of experience working on FAU / optical connector to chip attachment.
• Experience with optical data analysis.

PsiQuantum provides equal employment opportunity for all applicants and employees. PsiQuantum does not unlawfully discriminate on the basis of race, color, religion, sex (including pregnancy, childbirth, or related medical conditions), gender identity, gender expression, national origin, ancestry, citizenship, age, physical or mental disability, military or veteran status, marital status, domestic partner status, sexual orientation, genetic information, or any other basis protected by applicable laws.

Note: PsiQuantum will only reach out to you using an official PsiQuantum email address and will never ask you for bank account information as part of the interview process. Please report any suspicious activity to recruiting@psiquantum.com.

We are not accepting unsolicited resumes from employment agencies.

PsiQuantum’s mission is to build the first useful quantum computers—machines capable of delivering the breakthroughs the field has long promised. Since our founding in 2016, our singular focus has been to build and deploy million-qubit, fault-tolerant quantum systems. 

Quantum computers harness the laws of quantum mechanics to solve problems that even the most advanced supercomputers or AI systems will never reach. Their impact will span energy, pharmaceuticals, finance, agriculture, transportation, materials, and other foundational industries. 

Our architecture and approach is based on silicon photonics. By leveraging the advanced semiconductor manufacturing industry—including partners like GlobalFoundries—we use the same high-volume processes that already produce billions of chips for telecom and consumer electronics. Photonics offers natural advantages for scale: photons don’t feel heat, are immune to electromagnetic interference, and integrate with existing cryogenic cooling and standard fiber-optic infrastructure. 

In 2024, PsiQuantum announced government-funded projects to support the build-out of our first utility-scale quantum computers in Brisbane, Australia, and Chicago, Illinois. These initiatives reflect a growing recognition that quantum computing will be strategically and economically defining—and that now is the time to scale. 

PsiQuantum also develops the algorithms and software needed to make these systems commercially valuable. Our application, software, and industry teams work directly with leading Fortune 500 companies—including Lockheed Martin, Mercedes-Benz, Boehringer Ingelheim, and Mitsubishi Chemical—to prepare quantum solutions for real-world impact. 

Quantum computing is not an extension of classical computing. It represents a fundamental shift—and a path to mastering challenges that cannot be solved any other way. The potential is enormous, and we have a clear path to make it real. 

Come join us. 

Job Summary:

Our system architecture team sits at the interface of hardware development, manufacturing, and the quantum architecture to design the first fault-tolerant quantum computer. We are looking for a computational physicist to drive the efforts of developing internal tools for developing tools for designing and analyzing the system architecture in close collaboration with other technical teams.

Responsibilities:

• Design and develop software tools and infrastructure to enable development, analysis and tracking of our quantum system architecture.

• Contribute to our Quantum Computing system architecture and software system roadmap.

• Develop and improve simulation tools that evaluate system models of photonic modules using Fock and Gaussian states.

• Contribute to tool development for analysis and inspection of hierarchical multi-scale models of planned systems.

• Maintain graph-based models modules and subsystems and infrastructure to ensure consistency and compatibility with up- and downstream models.

Experience/Qualifications:

• Degree in Physics and a strong background in quantum optics and quantum information.

• Proficiency in Python.

• 3+ years of experience in software development, with an emphasis on scientific computing.

• Ability to collaborate effectively across departments, sites, and time zones.

• A hands-on mentality to own challenges and develop solutions independently.

• Competent use of collaborative software development tools (e.g., GitLab) is desirable.

• Experience with Docker and Postgres is optional, but beneficial.

PsiQuantum provides equal employment opportunity for all applicants and employees. PsiQuantum does not unlawfully discriminate on the basis of race, color, religion, sex (including pregnancy, childbirth, or related medical conditions), gender identity, gender expression, national origin, ancestry, citizenship, age, physical or mental disability, military or veteran status, marital status, domestic partner status, sexual orientation, genetic information, or any other basis protected by applicable laws.

Note: PsiQuantum will only reach out to you using an official PsiQuantum email address and will never ask you for bank account information as part of the interview process. Please report any suspicious activity to recruiting@psiquantum.com.

We are not accepting unsolicited resumes from employment agencies.