Sr. Staff Mechanical Engineer

At d-Matrix, we are focused on unleashing the potential of generative AI to power the transformation of technology. We are at the forefront of software and hardware innovation, pushing the boundaries of what is possible. Our culture is one of respect and collaboration. We value humility and believe in direct communication. Our team is inclusive, and our differing perspectives allow for better solutions. We are seeking individuals passionate about tackling challenges and are driven by execution.  Ready to come find your playground? Together, we can help shape the endless possibilities of AI.  Role Overview d-Matrix is seeking an experienced Mechanical Engineer to lead rack-scale mechanical design for our AI inference hardware platform, from chip/package to full system level. In this role, you'll own mechanical systems through their entire lifecycle — from concept and validation to mass production — working closely with thermal, electrical, software, and systems engineering teams. You'll bring deep expertise in OCP (Open Compute Project) specifications, chassis and sheet metal design, and supplier/ODM management to help scale our hardware in a fast-paced startup environment. This is a hands-on role for someone who thrives working across disciplines and can drive mechanical programs from first concept through high-volume manufacturing. This role owns mechanical systems at the rack, enclosure, and cross-program level, including oversight of liquid-cooled rack architectures. It partners closely with the Card & Sub-Chassis Mechanical Engineer, who owns card-level design and the MCM-to-cold-plate interface within the Monza chassis — this role is not expected to duplicate that card/cold-plate ownership, but should have enough liquid-cooling fluency to review and integrate that work at the rack level. What You Will Do - Lead mechanical design for our AI inference hardware platform at rack scale, in compliance with OCP specifications. - Design and validate chassis mechanical systems, sheet metal enclosures, cooling architectures, and high-power connections. - Own the full product lifecycle — from design and validation through NPI to mass production. - Conduct mechanical reliability testing (shock, vibration, thermal cycling) and lead 3D modeling, FEA, and tolerance analysis to validate designs for manufacturability. - Partner with suppliers, ODMs, CMs, and JDMs to develop custom mechanical/thermal components and manage manufacturing support through production ramp. - Debug and resolve quality issues surfaced during NPI and production, driving root-cause analysis and corrective action. - Review and sign off on liquid-cooled cold plate and manifold integration at the rack level (design owned by the Card & Sub-Chassis Mechanical Engineer), ensuring compatibility with CDU interfaces and facility water connections. - Develop specifications and test procedures for reliability and performance and mentor engineers across the design lifecycle. - Evaluate new technologies and methodologies to improve mechanical and thermal performance and ensure compliance with quality standards through product launch. What You Will Bring - Bachelor’s degree in mechanical engineering or a related field. - 10+ years of industry experience in mechanical design, simulation, and validation for IT hardware, with demonstrated technical leadership of full rack-scale programs. - Hands-on experience with OCP specifications and rack-scale system design. - Strong background in chassis mechanical design, sheet metal design/fabrication, and design-for-manufacturability (DFM) at high volume. - Experience running and interpreting shock and vibration testing. - Proven track record taking designs from concept through validation to mass production