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.

The Product

In a rapidly evolving world, trust in AI depends on AI agents being grounded in fresh, verified real-world data. Search is the foundation that makes this possible.

We are building an agent-native search platform designed specifically for AI systems rather than human users. Our product provides programmatic, low-latency, and observable search APIs that AI agents use to retrieve, filter, and reason over real-world information at scale.

The Role

We are looking for a Senior Software Engineer to work on the runtime systems of a novel search engine tailored for agentic AI consumption.

In this role, you will focus on building low-latency, high-throughput systems that serve search queries in real time. You will work on the critical path of user-facing requests, where performance, predictability, and efficiency directly impact product quality. You will design and operate systems that handle thousands of requests per second under strict latency budgets, optimising every layer from request handling to data access and response assembly.

In this position, your responsibility will be to

• Design, implement, and operate core runtime services for serving search queries at scale
• Build and optimise request flows, including query processing, retrieval orchestration, and response assembly under strict latency budgets
• Develop systems that maintain performance and predictability under high load
• Optimise CPU, memory, and data access patterns in performance-critical paths
• Ensure reliability, observability, and predictability across production services
• Build well-tested systems with clear responsibilities and interaction contracts, while remaining flexible as architecture evolves
• Define and implement observability primitives, including structured logs, metrics, traces, and latency breakdowns
• Monitor throughput, latency, and resource usage, and drive improvements in performance and cost efficiency
• Collaborate with indexing and ML teams to integrate retrieval and ranking components, keeping ML logic decoupled from core system internals
• Support experimentation and iteration through controlled rollouts and rigorous benchmarking

You may be a good fit if you:

• Have 5+ years of experience as a software engineer working on production backend systems
• Have strong hands-on expertise in C++ or Rust in real-world, high-load services
• Have built and operated high-load, low-latency user-facing systems handling thousands of RPS under strict latency constraints
• Understand performance at a systems level — CPU, memory, networking, and data access
• Have operated your own code in production: deployed it, debugged incidents, and rolled back changes when necessary
• Think end-to-end about request flows rather than staying within isolated components
• Can balance correctness, latency, and development velocity, making pragmatic tradeoffs when scope or time requires
• Collaborate effectively across engineering, ML, and product teams, communicating clearly in cross-functional settings

Strong candidates may also have experience with:

• DBMS internals (open source or SaaS) and cloud infrastructure
• High-load web applications or large-scale APIs
• Performance-critical systems such as trading platforms or real-time data pipelines
• Low-level performance tuning and hardware-level optimisation
• Open-source contributions or active involvement in the engineering community
• Competitive programming or CTF participation
• SHAD or similar advanced technical programmes
• Conference talks or technical publications

We conduct coding interviews as part of the process.

The Role… 

At Soho House, as a Maintenance Assistant, you will support the Maintenance Supervisor and Facilities team in ensuring that the building, facilities, and equipment across the club are maintained to a high standard. You’ll play a hands-on role in keeping the club safe, functional, and well-presented for our members, guests, and staff. 

This position is ideal for a proactive, reliable individual with a basic technical skillset and a strong service mindset. 

What's in it for you?

• Weekly Pay
• Team meal whilst on shift prepared by our chefs
• Soho Friends Membership
• 50% Team discount on Food & Drink, 7 days a week
• Staff Room Rates
• Health Cash Plan (Option to add up to 2 additional dependents)
• Dental Plan (option to add up to additional 2 dependents)
• Birthday Day Off after 1 years continuous service 
• Up to 50% Staff Discount on Cowshed & Soho Home
• In conjunction with Soho Impact, take 2 days paid a year to support a charity of your choice.
• Free Counselling Sessions
• Cookhouse & House Tonic: Our Cookhouse & Tonic Programmes offer unique food and drink training, events and opportunities to inspire and educate.
• Continuous training to develop yourself personally and professionally
• Team Events: From fitness sessions to cinema screenings and art classes, each month we hold a series of fun events which you can sign up to.

Soho House offers competitive compensation packages that feature global benefits and perks. Whether you’re seeking entry-level employment or a new opportunity to expand your profession, we offer training to develop the technical and managerial skills necessary to enhance your career

Key duties…

• Carry out minor repairs and general maintenance tasks (painting, basic plumbing, light bulb changes, furniture assembly, etc.) 
• Support planned preventative maintenance (PPM) and reactive work orders as directed by the Maintenance Supervisor 
• Assist with inspections of equipment, fixtures, and building systems to identify issues early 
• Help with room and facility setups for meetings, events, or club functions 
• Keep maintenance tools, workspaces, and plant rooms clean, tidy, and safely stored 
• Monitor stock of essential maintenance supplies and report shortages 
• Respond quickly and professionally to urgent repair requests or facility concerns 
• Work closely with housekeeping and operations teams to ensure a well-maintained environment 
• Always follow health and safety policies and safe working practices 

What we are looking for...

A successful Maintenance Assistant for Soho House will ideally have up to 2 years’ experience in a busy high-profile venue and a natural flair for first class service. You’ll be reliable, friendly and happy to be a key part of the team that strives for success.  

• Basic experience in general maintenance, handyman work, or a similar support role 
• Comfortable using tools and carrying out physical tasks 
• Good attention to detail and pride in keeping spaces clean and functional 
• Able to work independently and as part of a team 
• Flexible and willing to support different departments as needed 

Desirable: 

• Basic qualifications in building services, maintenance, or manual trades 
• Experience in a hotel, club, or hospitality environment 
• Familiarity with maintenance logs, task tracking, or work order systems 

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.

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.

We are seeking a highly skilled Quality Engineer with a background in electronics to join our growing Quality team. The role will focus on quality assurance of Spire’s electronic systems, ensuring the reliability and compliance, both within spacecraft hardware and ground-based supporting equipment. Alongside your specialism, you will also contribute across the broader quality domains including manufacturing, supplier quality, engineering, and process improvement. 

The Quality Engineer will collaborate closely with managers and team leads, to implement effective quality measures within their respective teams. 

To excel as a Quality Engineer at Spire, the ideal candidate will possess exceptional problem-solving abilities, ensuring that all processes and products consistently meet or exceed established quality standards. 

What You’ll Do as Quality Engineer:  

Electronics Quality (Primary Focus): 

• Develop and implement quality strategies for electronic assemblies & parts, covering internal developments, COTS components, PCBs, and embedded systems across the full product lifecycle.
• Co-ordinate and support engineering design, test, and manufacturing teams in conducting failure analyses, root-cause investigations, and corrective/preventive actions (e.g. RCA, 8D, 5-Why).
• Monitor, evaluate, and report on in-process quality performance.
• Provide quality oversight of electronic manufacturing processes, including soldering, PCB assembly, reflow, conformal coating, and component selection.
• Collaborate with design engineering to drive DFM, DFT, and reliability improvements. 

 Broader Quality Responsibilities: 

• Maintain and improve the organisation’s Quality Management System (ISO 9001, working towards AS9100).
• Support quality planning, audits, document control, and continuous improvement initiatives.
• Chair cross-functional problem-solving activities across functional domains.
• Participate in supplier evaluations, audits, and ongoing performance management.
• Support production quality activities including first article inspections, process capability, and product acceptance (including environmental and reliability testing).
• Contribute to risk management and compliance across internal and external stakeholders. 

 Key Skills: 

• Degree in Electronics Engineering, Electrical Engineering, or a closely related field.
• Solid understanding of IPC standards (e.g. IPC-A-610, J-STD-001) and electronics manufacturing best practices.
• Strong experience in electronics manufacturing, quality engineering, or hardware reliability.
• Demonstrated use of quality management methodologies such as Six Sigma, Lean, or 8D problem solving.
• Ability to interpret technical drawings, schematics, BOMs, and test documentation.
• Experience working in a fast-paced engineering or high-reliability environment (space, aerospace, defence, or similar).
• Excellent communication skills and ability to work collaboratively across disciplines. 

 Preferred Skills: 

• Familiarity with high-reliability engineering or quality assurance standards used in regulated technical industries.
• Familiarity with incoming inspection processes for electronic components.
• Understanding of reliability testing methods (e.g. thermal cycling, vibration, HALT/HASS).
• Experience working with configuration management or document control systems.
• IPC-A-610 Certification.

Spire operates a hybrid work model, and this position will require you to work a minimum of three days per week in the office.

Access to US export-controlled software and/or technology may be required for this role. If needed, Spire will arrange the necessary licenses—this is not something candidates need to have before applying. #LI-MI

As a GNC/AOCS Engineer - Avionics at Spire, you will operate as part of a technical team who maintains responsibility across the full lifecycle of the Spire GNC product and its subcomponents. The GNC team interfaces directly with many engineering groups to conduct R&D, design, manufacturing, and operations activities, ultimately ensuring all current and future spacecraft systems satisfy their mission. Ideal candidates will embrace the commercialization of nanosatellite systems and adapt to low-cost, fast-paced systems design, development, and implementation methodologies that set Spire apart from our competition. In this fast-paced environment, the design to launch cycle is measured in weeks and months, not years!  

What You’ll Do:  

• Design, evaluate, select, qualify and implement flight sensors, including magnetometers, sun sensors, inertial measurement devices, Earth sensors, and/or star trackers.
• Design, evaluate, select, qualify and implement flight actuators, including magnetic torque elements, reaction wheels, and propulsion systems.
• Design, implement and maintain simulation models for GNC subcomponents in our 6-DOF simulation environment.
• Technical ownership of current and future GNC avionics peripherals, supporting troubleshooting, design and updates to improve reliability and performance.
• Working closely with cross-functional teams, including hardware, software, and systems engineers, to integrate avionics solutions into the larger platform.
• Develop component qualification and acceptance processes and be hands-on in laboratory and manufacturing environments. 

Key Skills:   

• Experience with flight sensors for spacecraft attitude determination/estimation.
• Experience with actuators, including actuator sizing, modelling, design and integration.
• A solid foundation in spacecraft attitude dynamics and control algorithms, with emphasis sensor ingestions and actuator command calculation.
• Experience working hands-on with HW and familiarity with 'hardware-in-the-loop` simulation.
• Experience developing software using C/Python.
• Have experience or familiarity with the Linux development environment.
• Have experience working with external engineering contractors.  

Preferred Skills:  

• Experience writing flight software.
• Experience designing and/or implementing Kalman filters and feedback control for attitude estimation.
• Experience with C or C++ development for embedded systems.
• Experience with spacecraft design.
• Experience with spacecraft assembly, integration, and testing.
• Experience with spacecraft operations and maintenance.
• Experience identifying and resolving system anomalies.
• Experience creating and maintaining integration and test campaigns for attitude determination and control systems, including hardware and software.  

Spire operates a hybrid work model, and this position will require you to work a minimum of three days per week in the office.  

Access to US export-controlled software and/or technology may be required for this role. If needed, Spire will arrange the necessary licenses—this is not something candidates need to have before applying. 

. #LI-MI