Senior Mechanical Test Engineer
FulfilMountain View, CA$135k – $160kPosted 26 March 2026
Tech Stack
Job Description
Fulfil is a well-funded, rapidly growing, and inclusive company that has developed a custom automation robotics system to pick and pack online orders of groceries and other consumables, bringing delight and a value proposition to consumers that doesn’t exist today. Additionally, its unique design and technology is purpose-built to solve today’s environmental problems in the world’s food supply chain. Founded by a team with previous startup success and backed by top-tier VCs, we are committed to reducing waste, improving environmental impact, and reducing emissions with truly new technology. Our first commercial product launch with the technology was in summer 2022.
We can’t do it alone -- we’re seeking curious, capable, passionate team members motivated by the opportunity to create lasting impact on the world through their work. This role offers ample growth opportunities while working side-by-side with an impassioned, multi-disciplinary team spanning mechanical design, software, computer vision, systems integration, and ops to design and operationalize world-changing technology.
Fulfil is committed to creating an inclusive culture, and we celebrate diversity of all kinds. If this sounds like the kind of environment that you find intriguing, then please apply even if you don’t feel you meet all the requirements listed below. We'd love to hear from you.
Your Responsibilities
The Senior Mechanical Reliability Engineer will be responsible for developing and performing test methodologies to determine the robustness and long term reliability (LTR) of Fulfil’s robotic systems. As a core part of the RD team, you will assume a great deal of responsibility ensuring tests are well designed and well executed in order to uncover potential end of life (EOL) issues. You will need to design test fixturing and build test fixtures. This role will require you perform root cause and failure analysis on issues discovered during testing. The ideal candidate must have a keen understanding of fatigue and wear related failure modes but also be knowledgeable in multiple fields including robotics, hardware, electronics and automation in order to handle multiple failure modes that could arise during testing. Communicating clearly with other teams is key to this role to ensure effective solutions are implemented, whether they be design, maintenance or process based. This role offers ample growth opportunities while working side-by-side with a motivated team to bring our innovative and exciting new technology to reality.
In this role you will:
Engineer the transition of Fulfil’s system from prototype to production machines by improving their LTR and Robustness over entire expected life time
Design test fixtures based on current and future Fulfil designs using SolidWorks
Own creation of test plans for inducing EOL failure on various robotic assemblies and components
Build models to determine how many units need to be tested and for how long to support specific reliability objectives
Carry out testing for LTR, ensuring proper execution of methodology including HALT testing
Perform root cause and failure analysis during the testing cycles
Analyze and interpret data from LTR test, presents this data and conclusion to various stakeholders to determine best path forward
Leverage wide breadth of engineering knowledge to generate proper solutions to an equally diverse set of problems
Lead projects requiring cross-team coordination, project management, resource management, decision making, and effective communication on tight timelines in order to run effective tests
Develop and implement new equipment or functionality to improve the Fulfil technical ecosystem
Identify and implement mechanical design improvements and product changes to solve issues. Verify fix effectiveness with a data driven approach
Lead 3D CAD and BOM generation, perform detailed design work on large complex systems
Create detailed component and assembly drawings using GDT
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