Mechanical Engineer 3

Monarch Quantum; San Diego (CA); On-site; USD 125,000 - 175,000; Full time

Benefits offered by this job

Medical, Dental, Vision insurance

401(k) with company matching

Paid time off

Job summary

Monarch Quantum is seeking a Mechanical Engineer III to help build our foundational systems in a fast-paced startup. You will work both independently and with peers, mentoring junior engineers and ensuring rigorous analysis, data quality, and documentation.

You will apply solid mechanics, materials science, and CAD/analysis tools to drive design, fabrication, and verification across CNC, sheet metal, and photonic assembly processes.

Qualifications

• Bachelor’s degree in mechanical engineering, physics, or a related field.
• Minimum of 5 years of relevant experience, ideally within a startup or technology company.

Responsibilities

• Lead independent and team tasks; mentor junior engineers.
• Plan, prepare, data collection and analysis with peer reviews and documentation.
• Ensure data quality, conformance to company best practices, and clear documentation.
• Grow competency through mentorship, curiosity, communication and initiative.

Skills

Mechanical Eng

Materials

CNC milling

CNC turning

Sheet metal

Injection molding

Laser cutting

Water jet

3D printing

Photonic assembly

Die bonding

Vacuum reflow

Wire bonding

Adhesives

Structural theory

Fluid dynamics

Heat transfer

SolidWorks

Python

ANSYS Workbench

Data analysis

Instrumentation

Education

Bachelor’s degree in mechanical engineering, physics, or related field

Tools

SolidWorks

Python

ANSYS Workbench

Job description

Join our fast-paced and passionate team as a Mechanical Engineer 3. As we scale, you will be instrumental in building our foundation from the ground up. This is a dynamic, hands-on role for a self-starter who thrives in a fluid startup environment. You'll have the opportunity to work on cutting edge technologies, work closely with leadership, and develop and implement engineering practices that support our mission and growth. Your key responsibilities are as follows:

• Work independently and in a team while over communicating with the manager, project engineer and the teammates. Will mentor junior engineers.
• Execute complex engineering tasks involving planning, preparation, data/information collection and analysis and decision-making in a process involving peer reviews and documentation of the results.
• Use tenacity, patience, self-discipline and passion for excellence to assure accuracy of execution schedule, data quality/integrity, conformance to company best practices, clarity in communication and documentation.
• Use every opportunity to grow competency thru mentorship, curiosity, communication, exposure and initiative.

• This position requires access to export-controlled information. Employment is contingent upon the applicant being a U.S. person as defined by 8 U.S.C. § 1324b(a)(3).

Experience:

• A bachelor’s degree in mechanical engineering, Physics, or a related field.
• Minimum of 5 years of relevant experience, ideally within a startup or technology company.

Skills:

• Deep working knowledge of multiple ME topics and strong understanding of standard mechanical engineering degree curriculum.
• Deep understanding of material properties, mechanisms, fabrication methods: CNC milling, CNC turning, sheet metal, injection molding, laser cutting, water jet cutting, and 3D printing (metal and plastic).
• Deep understanding of designing for photonic assembling methods: Die bonding, vacuum reflow soldering, wire-bonding, adhesives, etc.
• Deep understanding of structural theory: static, modal, random vibration, shock, etc.
• Deep understanding of fluids and heat transfer theory: conduction, convection and radiation.
• Demonstrated successful execution of engineering tasks including use of mechanical CAD (SolidWorks preferred) and quantitative analysis/programming tools (Python), instrumentation and measurement, part fabrication or procurement, integration and test, data collection, analysis (ANSYS Workbench) and documentation.

Startup Mindset:

• You're creative, flexible, and eager to wear multiple hats.
• You're passionate about building systems from the ground up and comfortable with ambiguity and change.

The expected annual salary range for this position is $125,000-$175,000.

As a full-time employee, you will be eligible for Monarch’s comprehensive benefits package, which includes:

• Medical, Dental, and Vision insurance
• Fidelity 401(k) plan with 4% employer matching
• 20 paid time off (PTO) days per year
• 13 paid company holidays
• 9/80 work schedule (every other Friday off)

Monarch Quantum is proud to be an equal opportunity employer and does not discriminate on the basis of race, color, citizenship status, national origin, ancestry, sex, sexual orientation, age, religion, creed, physical or mental disability, medical condition, marital status, veteran status or any other characteristics protected under applicable federal, state and local laws.