Senior Manufacturing Engineer - DFM

What you'll do Design for Manufacturability (Core Focus): Partner with Mechanical Design Engineers to translate product concepts into manufacturable, scalable solutions Drive DFM/DFX initiatives, including tolerance stack-ups (GD&T), datum strategy, and assembly sequencing Convert assembly process learnings (error-proofing, access, ergonomics) into clear design

requirements Actively influence and challenge product design decisions using first-principles engineering and manufacturing constraints Contribute to design decisions with understanding of stress, interfaces, and system integration Assembly and Equipment design: Design and develop fixtures, jigs, and assembly equipment with a focus on precision, repeatability, and cost Perform tolerance analysis and support detailed 2D drawing creation for fabrication Support early validation through prototyping, testing, and iteration Select and integrate actuators, sensors, and standard components; define functional sequences for automation Emphasize simple, robust solutions using off-the-shelf components where possible Manufacturing Scale-Up: Own the transition of assembly processes from prototype builds to scalable production systems Plan and validate production processes using PFMEA, DOE, and capability studies (Cpk, GR&R) Collaborate cross-functionally with Quality, Supply Chain, and Operations to move from prototype to volume production Support factory layout, line design, capacity planning, and continuous improvement efforts What you'll bring Education and work experience: Bachelor’s or Master’s degree in Mechanical Engineering or related field 5+ years of experience in mechanical design, manufacturing engineering, or a hybrid role Strong foundation in: Proficiency in CAD tools (e.g., SolidWorks, CATIA) GD&T and tolerance stack-up analysis 2D drawing creation for manufacturing Datum strategy and precision assembly Demonstrated experience influencing product design for manufacturability Experience designing assembly processes and scaling from prototype to production Familiarity with: PFMEA, 8D, DOE Process capability (Cpk), GR&R Assembly technologies (fastening, machining, laser metrology) Willingness to travel internationally up to 15% What Sets You Apart Ability to challenge design decisions with data and first-principles thinking Strong intuition for “what will break at scale” vs. what works in prototype Hands-on mindset—you’re comfortable on the floor validating your ideas Bias for simple, cost-effective solutions over over-engineering \n $116,000 - $136,000 a year This position is onsite at our Menlo Park HQ . The salary will be adjusted to reflect local market conditions based on employee location as well as the experience of the employee. Along with the base salary, Mainspring offers pre-IPO stock options +

benefits. \n Does your experience not meet all of our posted

requirements? Studies have shown that some people are less likely to apply to positions unless they meet every listed requirement. At Mainspring, we are committed to building a diverse, inclusive, flexible, and collaborative environment, so if you want to help us transition the world to clean and affordable electricity, and don’t meet all posted

requirements for a particular role, we’d still love to hear from you. Mainspring can sometimes be flexible enough to shift

responsibilities for the right person, or otherwise identify open or upcoming roles that may better fit your professional background. In more traditional words, Mainspring Energy, Inc is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, or protected veteran status and will not be discriminated against on the basis of disability. This

compensation and

benefits information is based on Mainspring Energy's estimate as of the date of publication and may be modified in the future. We generally do not negotiate on salary once we have made an offer. The level of pay within the range will depend on a variety of job-related factors that may include location, relevant prior experience and/or education, or particular skills and expertise. New hires joining the company tend to be paid within the starting base pay range noted above, with opportunities to increase pay over time based on development of additional skills, competencies, and company-specific knowledge.

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