Hardware Test Engineer

Mill; San Bruno (CA); On-site; USD 130,000 - 145,000; Full time

Job summary

Mill is seeking a Hardware Test Engineer based in San Bruno, California. You will be responsible for designing and overseeing tests for innovative dry and grind technology, collaborating cross-functionally with various engineering teams.

Your role involves developing test apparatuses, integrating sensors, and ensuring the reliability and functionality of products. Ideal candidates will possess a BS/MS in relevant engineering fields with 3-5 years of hands-on experience in this area.

Qualifications

• 3-5 years experience developing test fixtures and infrastructure.
• Experience with product development cycles.
• Strong communication skills in various formats.

Responsibilities

• Design and construct test apparatuses for product verification.
• Develop measurement methods integrating sensors.
• Write documentation with clear processes for test operation.

Skills

Test design

Cross-functional communication

Electromechanical integration

Measurement and instrumentation

Data acquisition systems

Python coding

Education

BS/MS in Mechanical/Mechatronics/Electrical engineering

Tools

Solidworks/Fusion/NX CAD

Arduino

Raspberry Pi

Job description

About this Role

As a Hardware Test Engineer at Mill, you will be responsible for creating and overseeing the tests used to verify and validate the next generation of Mill’s commercial dry and grind technology. We are a small team and you will work cross-functionally with Electrical/Mechanical Engineers, Algorithms and Systems Teams to design and operate tests that demonstrate functionality and reliability of products and features. Because of this, you’ll also have key insights into influencing the direction of design and implementation of features necessary for the success of our products! We’re looking for someone who not only uses a thorough approach to test design, but also has the ability to get hands‑on in delivering robust test apparatuses with clear and consistent outputs, both in results and in documentation.

Responsibilities

• Design and construct test apparatuses for characterizing, evaluating, and verifying product/system features and functionality
• Develop measurement methods from the ground up — selecting and integrating sensors and proving out fixture accuracy and repeatability
• Partner with algorithms and firmware teams to verify operational intent of features and systems under test, and advise on parameter adjustments
• Advise mechanical engineers on design changes based on test results
• Work with systems engineers to validate requirements with either benchtop tests or quick prototypes that corroborate theoretical models
• Stand up data pipelines to seamlessly visualize collected test results
• Write documentation with clear processes and procedures on test operation
• Create test reports and slide decks that highlight key areas of improvement for features and mechanisms, and advise on risks for development
• Diagnose and triage issues in the field, using hands‑on troubleshooting and problem‑solving to recommend solutions

Qualifications

Required

• BS and or MS degree in related engineering fields (Mechanical/Mechatronics, Electrical, etc.)
• 3-5 years experience working hands on in developing test fixtures and infrastructure
• Experience through at least one or more product development cycles
• Demonstrated experience with working and communicating cross functionally between various engineering disciplines
• Hands‑on experience with electromechanical integration and part selection
• Experience with measurement and instrumentation — including force, vibration, and temperature sensing — and a strong grasp of accuracy, precision, and error sources
• Strong communications skills through written, verbal and graphical presentation techniques
• Ability to work both independently and collaboratively across the entire company
• Experience with data acquisition systems and IO computing devices (Arduino, Raspberry Pi) to configure test operations and collect data
• Experience writing code (Python, etc) to script tests for automated operation

Preferred

• Solidworks/Fusion/NX CAD proficiency
• Prior startup experience preferred
• Experience working with accelerometers, strain gauges/load cells, fluid handling systems, and/or air flow characterization
• Working with high powered appliances
• Experience with Jetson, Raspberry Pi CM, or other embedded compute platforms integrated into hardware systems

The estimated base salary range for this position is $130K-145K which does not include the value of benefits or a potential equity grant. A wide range of factors are considered in making compensation decisions, including but not limited to skill sets, market conditions, experience and training, licensure and certifications, and business and organizational needs. At Mill, it is not typical for an individual to be hired at or near the top of the range for their role.