Senior / Staff Mechanical Engineer (Dropbox)

Join Dropbox as a Senior Mechanical Engineer, where you will be responsible for the mechanical architecture and detailed design of key assemblies. This hands-on role requires end-to-end ownership of mechanical scope, defining success metrics, leading trade studies, and integrating various components into reliable assemblies. You will collaborate closely with multiple teams and have the opportunity to mentor other engineers. The position is based in South San Francisco and involves regular on-site collaboration and occasional travel.

• Posséder l'architecture mécanique et la conception détaillée des assemblages clés, en équilibrant la sécurité, la fiabilité, la fabricabilité et la facilité de service.
• Définir les métriques de succès pour les systèmes, conduire les choix de conception pour atteindre les objectifs de fiabilité sur le terrain.
• Diriger les études de compromis et les décisions au niveau du système, documenter les compromis choisis et les risques résiduels.
• Traits: decisive engineering judgment, clarity in documenting assumptions and risks, rigorous data-driven decision-making, and calm, methodical troubleshooting under field pressure
• Track record resolving complex or intermittent hardware failures through disciplined root-cause analysis and corrective action implementation
• Experience integrating PCBAs, wiring harnesses, motors, sensors, and embedded controls into mechanical designs
• Demonstrated GD&T mastery, datum strategy, and practical tolerance-stack experience enabling repeatable high-yield assembly
• Strong mechanical fundamentals (hand calculations, FEA grounding, kinematics, bolted joints, materials, tolerance analysis) and advanced CAD skills managing system-level assemblies and drawing releases
• Deep mechanism and structure design experience (actuators, transmissions, bearings, seals, high-cycle moving assemblies) with demonstrated fatigue, wear, and environmental design competence
• Proven end-to-end ownership of electromechanical hardware through concept, validation, production ramp, and field deployment in customer-facing or unattended systems
• Experience working directly with suppliers and manufacturing to ship high-volume, high-reliability hardware; comfortable leading supplier qualification and on-site problem solving
• Prototyping and test experience; ability to define and run experiments and convert data into design decisions
• Location & logistics: this role is in-person in South San Francisco with regular on-site collaboration. Expect travel (~10–25% typical) to suppliers, manufacturers, test locations, and deployment sites depending on program needs
• Operating intensity & constraints: you will work on customer-facing, unattended field systems where rapid escalation, supplier trips, test campaigns, and production-support nights are required to protect fleet uptime; must be comfortable with high-responsibility, hands-on delivery cadence