Senior Mechanical Engineer

OUR MISSION SPAN is enabling electrification for all ⚡ WE ARE A MISSION-DRIVEN COMPANY DESIGNING, BUILDING, AND DEPLOYING PRODUCTS THAT ELECTRIFY THE BUILT ENVIRONMENT, REDUCE CARBON EMISSIONS, AND SLOW THE EFFECTS OF CLIMATE CHANGE. - Decarbonization is the process to reduce or remove greenhouse gas emissions, especially carbon dioxide, from entering our atmosphere. - Electrification is the process of replacing fossil fuel appliances that run on gas or oil with all-electric upgrades for a cleaner way to power our lives. AT SPAN, WE BELIEVE IN: - Enabling homes and vehicles powered by clean energy - Making electrification upgrades possible - Building more resilient homes with reliable backup - Designing a flexible and distributed electrical grid THE ROLE We are seeking a Senior Mechanical Engineer to join our Mechanical team in San Francisco. The role combines hands-on technical mechanical design work — 3D CAD modeling and 2D drafting against ASME Y14.5-2018 standards — with ownership of the systems and workflows that allow our globally distributed mechanical engineering organization to operate as a single, cohesive team. SPAN's mechanical engineering capability spans San Francisco and India, with senior engineering talent across both locations contributing to a shared product portfolio. In this role, you will own the SF-side prioritization, intake, and shared-tooling workstreams that connect the two offices — architecting the templates, conventions, workflows, and collaboration infrastructure that allow engineers in both locations to operate from a common foundation. Your work directly enables the productivity of a broader engineering bench, including multiple senior and senior staff engineers in India whose effectiveness depends on a strong, well-organized partnership across time zones. You will also work directly with our manufacturing partners across China and Southeast Asia, driving DFM reviews, resolving tooling and assembly questions, and shepherding pilot builds. As an experienced practitioner, you will serve as a technical resource within the broader mechanical engineering function and contribute to the development of less experienced engineers across the team. Responsibilities - Create detailed 3D CAD models and 2D drawings, ensuring compliance with ASME Y14.5-2018 standards. - Own the prioritization, intake, and sequencing of CAD work flowing between the San Francisco and India offices, serving as the SF-side point of contact for cross-office coordination. - Architect and maintain the shared tools, templates, file management conventions, and collaboration workflows that allow our distributed mechanical engineering team to function as a single team across time zones. - Drive DFM/DFA reviews with manufacturing vendors in China and Southeast Asia, resolve tooling and assembly issues, and protect design intent through production. - Perform tolerance analysis and contribute substantively to Failure Mode Effects Analysis (FMEA) processes. - Document design specifications and decisions clearly to maintain transparency across distributed teams. - Apply product life cycle management tools and processes to manage revisions and maintain design integrity. - Lead resolution of design issues, driving modifications that improve product performance. - Define product performance requirements and test criteria for verification and validation. - Drive product modules and components from concept to production volume while improving cost and quality. - Serve as a technical resource and mentor for less experienced engineers, sharing standards, best practices, and operational knowledge across the team. Potential Projects - Designing components for energy-efficient electrical ecosystems. - Designing new product concepts based on team inputs. - Driving engineering change requests and design updates. - Architecting an improved international 2D CAD collaboration workflow — file structure, drawing templates, intake process, status tracking — i