Software Engineer 3

Monarch Quantum· Engineering
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📍 San Diego, California, United StatesFull time💰 USD 125K–175K

About this role

Join our fast-paced and passionate team as a Senior Software Engineer. 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:

  • Develop and maintain C++ software for instrument communication and GUI applications.
  • Implement and improve Qt-based graphical user interfaces for commercial and internal applications.
  • Design and develop reliable software components that interact with hardware devices.
  • Write unit tests using Google Test to ensure software reliability and robustness.
  • Use CMake to manage build configurations and dependencies.
  • Collaborate with cross-functional teams, including firmware, hardware, and software engineers.
  • Participate in code reviews, provide constructive feedback, and adhere to best coding practices.
  • Maintain clear and well-structured documentation.
  • Work independently and in a team while over communicating with the manager, project engineer, and the teammates.
  • 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 through 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 Software Engineering, Computer Engineering, or a related field.
  • Minimum of 5 years of relevant experience, ideally within a startup or technology company.

Skills:

  • 5+ years of professional experience in C++ software development.
  • Strong understanding of modern C++ (C++ 14/17/20).
  • Experience with Qt 6 for GUI development with Qt Widgets & QML.
  • Experience with CMake for build and project configuration.
  • Familiarity with unit testing frameworks, preferably Google Test.
  • Ability to debug, profile, and optimize C++ applications.
  • Experience working with version control systems (Git).
  • Strong problem-solving skills and ability to work independently and in a team.
  • Experience with instrument communication protocols (e.g., SCPI, FTDI USB, Ethernet, Serial).
  • Familiarity with multi-threaded programming and concurrency in C++.
  • Knowledge of software best practices, including design patterns, SOLID principles, and performance optimization.
  • Experience working in an agile development environment.

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.

Frequently Asked Questions

What is the salary for the Software Engineer 3 role at Monarch Quantum?
The listed salary for this Software Engineer 3 position at Monarch Quantum is USD 125K–175K. This is an Full time role.
Where is the Software Engineer 3 position at Monarch Quantum located?
This Software Engineer 3 role at Monarch Quantum is based in San Diego, California, United States. The position is listed as on-site or hybrid. Check the full job description or apply directly to confirm the work arrangement.
Is the Software Engineer 3 role at Monarch Quantum full-time or part-time?
This is listed as a Full time position. It is posted as a Software Engineer 3 role in the Engineering department at Monarch Quantum.
Which team or department does the Software Engineer 3 at Monarch Quantum belong to?
This Software Engineer 3 position is part of the Engineering department at Monarch Quantum. See the full job description for more information about the team structure and responsibilities.
How do I apply for the Software Engineer 3 position at Monarch Quantum?
Click the "Apply Now" button on this page. You will be redirected to Monarch Quantum's official application portal hosted on workable where you can submit your application directly.
When was the Software Engineer 3 job at Monarch Quantum posted?
This Software Engineer 3 position at Monarch Quantum was posted on Jul 7, 2026. Apply as soon as possible — early applications are often reviewed first.
Software Engineer 3
Monarch Quantum · 💰 USD 125K–175K
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You'll be redirected to Monarch Quantum's official application page on workable.