Senior Mechanical Engineer, Fauna

We're looking for a Senior Mechanical Engineer to own the design and architecture of mechanical systems for our robotic platform. You'll own the mechanical design of enclosures, mounting systems, cable routing, sensor integration, and peripheral assemblies like our autonomous charging dock, and set the direction for how these subsystems integrate across the platform.This is a hands-on, CAD-intensive role. You'll spend your time designing parts, building assemblies, and iterating quickly through prototype build cycles, while also setting the mechanical interfaces and standards the broader team builds against. You'll work closely with electrical engineers on component packaging and thermal integration, with industrial designers on form factor and aesthetics, and with the broader platform team to solve mechanical problems that span subsystems.The right person for this role is a senior mechanical designer who moves quickly in CAD, thinks in terms of systems and constraints, and is comfortable owning the physical integration of electronics, sensors, and cables into compact assemblies. You're equally at home designing a precision alignment feature for a charging interface and routing a cable harness through a tight volume, and you can drive mechanical decisions that span subsystems and teams while raising the bar for the engineers around you.Key job responsibilities- Own the mechanical design and integration architecture of peripheral systems and accessories for the robotic platform, from concept through production- Design and maintain complex assemblies in Onshape with clean parametric architecture that supports rapid iteration- Set mechanical interface standards and design conventions that the broader platform team builds against- Solve packaging and integration problems: fitting electronics, sensors, connectors, and cables into compact, serviceable enclosures- Develop cable routing and harness packaging solutions within tight volume and serviceability constraints- Drive rapid prototyping cycles using 3D printing, CNC machining, and other methods to validate designs quickly- Collaborate with electrical engineers on component placement, thermal paths, and mechanical interfaces to PCBAs- Work with industrial designers to resolve form, fit, and manufacturability tradeoffs without compromising design intent- Perform tolerance analysis and manage fit/function across multi-part assemblies- Drive DFM and the transition to volume production with prototyping and manufacturing partners- Raise design quality across the team through design reviews, and mentor other mechanical engineersAbout the teamFauna Robotics, an Amazon company, is building capable, safe, and genuinely delightful robots for everyday life. Our goal is simple: make robots people actually want to live and interact with in everyday human spaces. We believe that future won’t arrive until building for robotics becomes far more accessible. Today, too much effort is spent reinventing the fundamentals. We’re changing that by developing tightly integrated hardware and software systems that make it faster, safer, and more intuitive to create real-world robotic products. Our work spans the full stack: mechanical design, control systems, dynamic modeling, and intelligent software. The focus is not just functionality, but experience. We’re building robots that feel responsive, expressive, and genuinely useful. At Fauna, you’ll work at the frontier of this space, helping define how robots move, manipulate, and interact with people in natural environments. It’s an opportunity to solve hard problems across hardware and software with a team focused on making robotics accessible and joyful to build. If you care about making robotics real for everyone and building systems that are as delightful as they are capable, we’re interested in hearing from you. Basic qualifications- Bachelor's degree in mechanical engineering or equivalent- 6+ years of mechanical engineering experience in product development- Track record owning the mechanical design of a subsystem or product from concept through production- Proficiency in 3D CAD (Onshape preferred) with ability to build complex, well-structured parametric models and assemblies- Experience designing parts for rapid prototyping (3D printing, CNC machining) and iterating through prototype build cycles- Strong 2D drawing skills with working knowledge of GD&T- Experience with mechanical packaging of electronics including PCB mounting, connector integration, and cable routing- Experience with tolerance stack-up analysis and fit/function verification- Experience working cross-functionally with electrical, firmware, and industrial design teamsPreferred qualification - Experience owning designs through to volume production and driving DFM at scale- Experience setting technical direction or mentoring engineers across a team- Experience with DFM for injection molded parts including draft, wall thickness, and tooling considerations- Experience designing sensor mounts or integration hardware for cameras, LiDAR, or other perception sensors- Experience with cable harness design, routing, and connector selection for electromechanical systems- Thermal management experience: heatsink design, airflow analysis, thermal interface material selection- Familiarity with additional manufacturing processes (die casting, sheet metal, urethane casting)- Exposure to structural simulation or FEA for part validation- Experience working across EVT/DVT build cycles in a product development context- Background in robotics, consumer electronics, or other compact electromechanical product developmentAmazon is an equal opportunity employer and does not discriminate on the basis of protected veteran status, disability, or other legally protected status.Los Angeles County applicants: Job duties for this position include: work safely and cooperatively with other employees, supervisors, and staff; adhere to standards of excellence despite stressful conditions; communicate effectively and respectfully with employees, supervisors, and staff to ensure exceptional customer service; and follow all federal, state, and local laws and Company policies. Criminal history may have a direct, adverse, and negative relationship with some of the material job duties of this position. These include the duties and responsibilities listed above, as well as the abilities to adhere to company policies, exercise sound judgment, effectively manage stress and work safely and respectfully with others, exhibit trustworthiness and professionalism, and safeguard business operations and the Company’s reputation. Pursuant to the Los Angeles County Fair Chance Ordinance, we will consider for employment qualified applicants with arrest and conviction records.Our inclusive culture empowers Amazonians to deliver the best results for our customers. If you have a disability and need a workplace accommodation or adjustment during the application and hiring process, including support for the interview or onboarding process, please visit for more information. If the country/region you’re applying in isn’t listed, please contact your Recruiting Partner.The base salary range for this position is listed below. Your Amazon package will include sign-on payments and restricted stock units (RSUs). Final compensation will be determined based on factors including experience, qualifications, and location. Amazon also offers comprehensive benefits including health insurance (medical, dental, vision, prescription, Basic Life & AD&D insurance and option for Supplemental life plans, EAP, Mental Health Support, Medical Advice Line, Flexible Spending Accounts, Adoption and Surrogacy Reimbursement coverage), 401(k) matching, paid time off, and parental leave. Learn more about our benefits at .USA, CA, Sunnyvale - 157,900.00 - 213,600.00 USD annually