<p><span data-contrast="auto"><em><strong>**This role is based in our Milpitas, CA, office, and requires being onsite 5 days a week.</strong></em><br><br>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.</span><span data-ccp-props="{"201341983":0,"335559739":200,"335559740":276}"> </span></p> <p><span data-contrast="auto">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.</span><span data-ccp-props="{"201341983":0,"335559739":200,"335559740":276}"> </span></p> <p><span data-contrast="auto">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.</span><span data-ccp-props="{"201341983":0,"335559739":200,"335559740":276}"> </span></p> <p><span data-contrast="auto">That approach has since been tested at the highest level of scrutiny the U.S. government applies to emerging technology, and it has held up. In 2025, PsiQuantum closed a $1 billion funding round that valued the company at $7 billion. In 2026, the U.S. Department of Commerce signed a $100 million Letter of Intent under the CHIPS and Science Act, followed by a $125 million agreement with DARPA under Stage C of its Quantum Benchmarking Initiative, PsiQuantum's most valuable U.S. government agreement to date. This year, we also broke ground on our utility-scale quantum computer in Brisbane, Australia, and continued building out our Chicago site. Victor Peng, our CEO, and co-founder Jeremy O'Brien, now Executive Chairman, lead a team and board that reflects how seriously the world is taking this build, joined this year by Intel's Lip-Bu Tan and Atomico's Niklas Zennström.</span><span data-ccp-props="{"201341983":0,"335559739":200,"335559740":276}"> </span></p> <p><span data-contrast="auto">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 Airbus, Lockheed Martin, Mercedes-Benz, Boehringer Ingelheim, and Mitsubishi Chemical, to prepare quantum solutions for real-world impact.</span><span data-ccp-props="{"201341983":0,"335559739":200,"335559740":276}"> </span></p> <p><span data-contrast="auto">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 now have the funding, the government validation, and the sites under construction to make it real.</span><span data-ccp-props="{"201341983":0,"335559739":200,"335559740":276}"> </span></p> <p><strong>Job Summary:</strong></p> <p>The mission of PsiQuantum's Principal Hardware Design Engineer role is to support the Electronics team by owning hardware designs integral to the underlying system of the quantum computer. This engineer will collaborate in cross-functional teams of thermal, mechanical, firmware, optical engineers. The designs will meet the requirements of the overall system architecture and physical framework of the quantum computer.</p> <p><strong>Responsibilities:</strong></p> <ul> <li data-renderer-start-pos="3">Design, create schematics, and oversee PCB layout of analog and digital circuitry consisting of but not limited to high-speed transceivers, 10+ Gbps electrical and optical data links, FPGA's, microcontrollers, clock distribution, power supply filters, inrush current limiters and power distribution.</li> <li data-renderer-start-pos="3">Ensure robust signal integrity and EMI suppression in all designs.</li> <li data-renderer-start-pos="3">Design and create test set-ups for testing of electro-optic modules.</li> <li data-renderer-start-pos="3">Characterize, optimize, and debug analog, digital, and electro-optic circuitry using equipment such as mixed signal & sampling oscilloscopes, vector network analyzers, signal generators, multimeters, DC power supplies.</li> <li data-renderer-start-pos="3">Develop software to drive measurements.</li> <li data-renderer-start-pos="3">Analyze data and extract key performance parameters.</li> <li data-renderer-start-pos="3">Maintain detailed documentation of hardware designs, test results, and design changes.</li> </ul> <p><strong>Experience/Qualifications:</strong></p> <ul> <li data-renderer-start-pos="3">Master's or Ph.D. Degree or above in Electrical Engineering, Physics or equivalent.</li> <li data-renderer-start-pos="3">10 years of relevant experience in product development and release to volume manufacturing leading to multiple successful commercial