Mechanical Engineer

About Us SemiValley is developing next generation thermal management technologies for high performance computing and AI infrastructure. We work at the intersection of mechanical engineering, heat transfer, fluid systems, manufacturing, and product development to solve challenging engineering problems for tomorrow's computing platforms. We're a small, fast-moving team where engineers take ownership across design, prototyping, testing, and product development. What You'll Do Design and develop mechanical components, assemblies, and test fixtures for advanced thermal and fluid systems. Create detailed CAD models, drawings, and documentation for prototype and production hardware. Work closely with electrical, thermal, and systems engineers to integrate mechanical designs into complete products. Build, assemble, and troubleshoot laboratory prototypes and experimental test platforms. Support mechanical validation, reliability testing, and root cause analysis. Collaborate with manufacturing partners to optimize designs for machining, additive manufacturing, sheet metal, and production assembly. Specify mechanical components including fittings, tubing, pumps, valves, sensors, fasteners, and structural hardware. Perform engineering calculations, tolerance analysis, and design reviews. Drive continuous improvements in performance, manufacturability, cost, and reliability. Participate in supplier selection, prototype sourcing, and engineering documentation. Qualifications Bachelor's or Master's degree in Mechanical Engineering or a related field. 2+ years of industry experience (new graduates with exceptional project experience are encouraged to apply). Strong CAD experience using SolidWorks or equivalent 3D CAD software. Experience designing mechanical assemblies and creating manufacturing drawings. Hands-on experience building, testing, and debugging hardware prototypes. Familiarity with machining, additive manufacturing, and common fabrication processes. Strong understanding of GD&T, tolerance stack-up, and Design for Manufacturing (DFM). Excellent problem solving and communication skills. Comfortable working in a fast-paced startup environment. Nice to Have Experience with thermal management, fluid systems, cooling technologies, HVAC, or heat exchangers. Knowledge of pumps, valves, tubing, pressure systems, or instrumentation. Experience with CFD or FEA tools such as ANSYS, COMSOL, or SolidWorks Simulation. Familiarity with laboratory testing, DAQ systems, sensors, and instrumentation. Experience bringing hardware from prototype through manufacturing. Experience working with external suppliers, CM partners, or manufacturing vendors. What We're Looking For We're looking for engineers who enjoy building real hardware, moving quickly from concept to prototype, and solving multidisciplinary engineering challenges. The ideal candidate is curious, hands-on, and excited to own projects from initial design through testing and iteration. Why Join SemiValley Work on challenging engineering problems at the forefront of AI infrastructure. Build products from the ground up with significant ownership and technical influence. Collaborate with experienced engineers, researchers, and industry partners. Gain exposure across mechanical design, testing, manufacturing, and product development. Join an early-stage startup where your work has an immediate impact. Pay: $200.00 - $350.00 per day Benefits: Paid time off Professional development assistance Work Location: In person