Job Summary:
As a Sr Instrument Software Engineer, you will design, develop, and maintain high-performance graphical applications for next-generation patient monitoring devices. This role leverages strong expertise in C++ development, computer graphics, and interactive UI systems to build reliable, efficient, and visually intuitive user interfaces. You will work on performance-critical software, collaborate closely with cross-functional teams, and contribute throughout the full software lifecycle—from design and implementation to testing and documentation.
Day to day:
- Design and develop C++-based GUI applications and visualization tools for embedded medical devices.
- Implement and maintain graphics-driven user interfaces, balancing usability, performance, and memory constraints.
- Build and optimize runtime systems, data formats, and serialization pipelines to support responsive UI behavior.
- Apply strong multithreading, memory management, and performance optimization principles.
- Participate in peer design and code reviews, ensuring software quality and maintainability.
- Produce clear software documentation and technical specifications.
- Contribute to software testing and validation, supporting stable and reliable device behavior.
- Collaborate in a fast-paced, cross-disciplinary development environment.
Required Qualifications:
- Strong fundamentals in computer graphics and real-time rendering concepts.
- 5+ years of C++ software development experience in performance-critical systems.
- Hands-on experience with GUI design and development, including visual tooling and user-facing interfaces.
- Solid understanding of operating system concepts, including scheduling, memory management, and multi-threading.
- Experience with software configuration management tools (Git, Jira-style workflows).
- Excellent analytical, problem-solving, and debugging skills.
- Strong verbal and written communication skills.
- Ability to excel in a dynamic, fast-moving development environment.
- BS or MS degree in Computer Science, Electrical Engineering, or a related field.
- Ability to work onsite Monday - Friday in Irvine, CA.
Preferred Qualifications:
- Experience with Qt / QML or similar GUI frameworks.
- Experience with OpenGL / OpenGL ES and shading languages (GLSL).
- Background in GPU-accelerated or graphics-intensive applications.
Education:
- BS or MS degree in Computer Science or Engineering
Compensation:
The anticipated salary range for this position is $120,000 - $170,000 plus benefits. Actual placement within the range is dependent on multiple factors, including but not limited to skills, education, and experience. This position also qualifies for up to 10% annual bonus based on Company, department, and individual performance.
Top Skills
What We Do
Masimo (NASDAQ: MASI) is a global medical technology company that develops and produces a wide array of industry-leading monitoring technologies, including innovative measurements, sensors, patient monitors, and automation and connectivity solutions. Our mission is to improve life, improve patient outcomes, reduce the cost of care, and take noninvasive monitoring to new sites and applications. Masimo SET® Measure-through Motion and Low Perfusion™ pulse oximetry, introduced in 1995, has been shown to outperform other pulse oximetry technologies in over 100 independent and objective studies, which can be found at www.masimo.com/evidence/featured-studies/feature. Masimo SET® is estimated to be used on more than 200 million patients around the world each year and is the primary pulse oximetry at all 10 top U.S. hospitals as ranked in the 2025 Newsweek World’s Best Hospitals listing. Additional information about Masimo and its products may be found at www.masimo.com.
