Sr Engineer III, Electronics

Job Summary:The Sr Engineer, Electronics is responsible for leading the design, development, verification, and support of complex electronic hardware used in Masimo’s medical device products. This role provides advanced technical contribution across the hardware development lifecycle, including architecture definition, circuit design, board-level implementation, verification, troubleshooting, and sustaining engineering. Working closely with cross-functional partners, this engineer independently drives complex technical solutions, supports critical product decisions, and contributes to product performance, reliability, and compliance objectives.Duties & Responsibilities:Lead design and development of analog and digital electronic circuits for medical device applications.Own hardware design activities across the engineering lifecycle, including architecture, schematic development, implementation, verification, and sustaining support.Perform and oversee circuit board and flex cable design activities, including schematic entry and layout collaboration.Define, document, execute, and analyze board-level and system-level verification test plans.Perform electrical design calculations, tolerance analysis, and technical performance assessments.Troubleshoot complex electrical issues at component, board, and system levels and lead root cause analysis efforts.Define system and board-level performance requirements for assigned projects.Support selection, qualification, and evaluation of electronic components and custom assemblies such as displays, touch panels, batteries, and related subsystems.Collaborate closely with software, mechanical, systems, manufacturing, and quality engineering teams to integrate hardware solutions into finished products.Contribute technical leadership during design reviews and major project milestones.Support product and component failure analysis investigations and recommend corrective design actions.Manage technical scope, deliverables, and schedule commitments for assigned hardware workstreams.Provide guidance and mentorship to less experienced engineers as needed.Ability to read, write, and communicate effectively in English.Ability to interpret technical documents, schematics, and written instructions.Ability to clearly document technical findings and communicate with cross-functional team members.Minimum Qualifications:10+ years of progressive experience in electronics design, development, and troubleshooting.Strong expertise in analog and digital circuit design.Strong experience with schematic capture tools such as PADS, OrCAD, Altium, or equivalent.Experience supporting PCB layout, board bring-up, and high-speed design methodologies.Strong troubleshooting capability using standard electronic lab instrumentation.Experience with embedded systems and firmware support for board bring-up.Working knowledge of communication protocols such as I2C, SPI, UART, and USB.Familiarity with full product development lifecycle from concept through production.Ability to translate system requirements into hardware design solutions.Strong analytical, technical problem-solving, and documentation skills.Effective written and verbal communication skills across cross-functional teams.Proficiency with Microsoft Office tools.Ability to work onsite Monday - Friday in Irvine, CA. Preferred Qualifications: Experience designing within medical device or other regulated product development environments. Familiarity with IEC 60601-1 and related compliance standards.Experience supporting EMC/EMI design, testing, and troubleshooting.Exposure to signal integrity and power integrity design considerations.Experience with electrical simulation tools such as PSPICE, Multisim, or equivalent.Programming experience in C for embedded systems support.Familiarity with MATLAB or similar engineering analysis tools.Exposure to embedded Linux environments.Education:Bachelor’s degree in Electrical Engineering or related technical discipline required; advanced degree preferred.Compensation: The anticipated salary range for this position is $130,000 - $170k plus benefits. Actual placement within this 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. Masimo offers benefits such as Medical, Dental, Vision, Life/AD&D, Disability Insurance, 401(k), Vacation, Sick, Holiday, Paid Maternity Leave, Flexible Spending Accounts, voluntary Accident, Critical Illness, Hospital, Long-Term Care, Employee Assistance Program, Pet Insurance, on-site Wellness Clinic, Fitness Center, Café. All benefits are subject to eligibility requirements.Physical requirements/Work Environment: This position primarily works in a laboratory environment. It requires frequent sitting, standing, and walking. Daily use of a computer and other computing and digital devices is required. May stand for extended periods when facilitating meetings or walking in the facilities.The physical demands of the position described herein are essential functions of the job and employees must be able to successfully perform these tasks for extended periods. Reasonable accommodation may be made for those individuals with real or perceived disabilities to perform the essential functions of the job described.Full timePosting Date: 2026-03-20