Senior Mechanical Engineer, Photonic Systems

PsiQuantumsmission is to build the first useful quantum computersmachines 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 approachisbased on silicon photonics. Byleveragingthe advanced semiconductor manufacturing industryincluding partners like GlobalFoundrieswe use the same high-volume processes that already produce billions of chips for telecom and consumer electronics. Photonics offers natural advantages for scale: photonsdontfeel heat are immune to electromagnetic interference and integrate with existing cryogenic cooling and standard fiber-optic infrastructure.

In 2024PsiQuantumannounced 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 definingand that now is the time to scale.

PsiQuantumalso develops the algorithms and software needed to make these systems commercially valuable. Our application software and industry teams work directly with leading Fortune 500 companiesincluding Lockheed Martin Mercedes-Benz Boehringer Ingelheim and Mitsubishi Chemicalto prepare quantum solutions for real-world impact.

Quantum computing is not an extension of classical computing. Itrepresentsa fundamental shiftand a path to mastering challenges that cannot besolvedany other way. The potential is enormous and we have a clearpathto make it real.

Come join us.

Job Summary:

The Senior Mechanical Design Engineer is responsible for designing highly complex optomechanical and optoelectronic packages. You will work closely with photonics packaging process test quality supply chain and external manufacturing partners to translate architecture and requirements into buildable manufacturable and verifiable package designs. Strong design skills incorporating mechanics of materials thermodynamics electronics integration optical alignment and precision design principles are a must.

Responsibilities:

• Ownership of package and subassembly designs from prototype through production readiness.
• Expertise in Design for Manufacturability Design for Assembly and supplier-ready build documentation.
• Expertise with GD&T for precision optomechanical interfaces datums fixtures and inspection plans.
• Expertise with tolerance analysis methods for optical alignment mechanical stack-up FAU attach and package interfaces.
• Generate and maintain process flow documentation build travelers and assembly sequence definition.
• Conduct DFMEA PFMEA CTQ mapping and risk analysis heat maps for package and process development.
• Fixture design & fabrication for alignment attach metrology handling and production build support.
• Test set-up design & fabrication for optical mechanical thermal and process verification activities.
• Generate & maintain BOMs build standards material callouts and configuration-controlled package documentation.
• Generate & maintain Specification & Drawing Trees for package subassembly fixture and supplier documentation.
• Ability to execute basic structural thermal warpage and tolerance analyses to down-select designs and reduce build risk.
• Comfortable with PDM / Arena ECO discipline drawing release supplier documentation packages and revision control.

Experience/Qualifications:

• Strong communication & interpersonal skills across engineering operations quality and supplier teams.
• Willingness to support colleagues and external partners to achieve schedule quality and build-readiness objectives.
• Exercises independent judgement in resolving design interface and manufacturability tradeoffs.
• Continuous learning mindset with interest in photonics packaging process development and production scale-up.
• Execution of deliverables against schedule & quality targets in a fast-moving productization environment.
• Experience with subcontractor management supplier technical coordination and manufacturing partner support.
• Masters Degree or above in Mechanical Engineering Optomechanical Engineering Packaging Engineering or a relevant discipline.
• 5 years of experience with a focus on optomechanical design optoelectronic packaging photonics packaging or precision mechanical 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.

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