Senior Mechanical Engineer

About the roleWe're looking for a hands-on Senior Mechanical Engineer to drive the design and development of advanced mechanical systems from concept to production. You'll work closely with our electrical, optical, photonics, and systems teams to build reliable, manufacturable, high-performance products.What you'll doOwn mechanical design of complex assemblies from concept to productionCreate 3D CAD models, drawings, assemblies, and BOMs for optoelectronic packagesPerform structural, modal, and thermal analysis (FEA)Drive DFM/DFA with internal teams and external vendorsSupport prototype builds, testing, and system integrationSolve precision alignment, thermal management, and sealing challengesMaintain documentation via PDMRequiredBS/MS in Mechanical Engineering 3+ years of mechanical engineering experienceStrong proficiency in SolidWorks and PDMSolid grasp of GD&T, tolerance analysis, and FEAHands-on prototyping and manufacturing experience (CNC, casting, etc.)Experience working cross-functionally in multidisciplinary teamsNice to haveStartup or fast-paced product development experienceBackground in optics, photonics, LiDAR, or precision alignmentElectronics packaging / PCBA integrationEnvironmental sealing and IP-rated enclosure designAbout SiLCSiLC is a 4D vision sensor company in Monrovia, CA, using FMCW lidar and coherent optical detection to generate high-resolution 3D point clouds — redefining what's possible in machine vision.Compensation$80,000–$120,000 base, depending on experience, plus stock options and equity tied to company milestones