Kforce has a client that is looking for a Principal C++/QT Software Engineer located in Irvine, CA. Our client is a medical device company that is developing a groundbreaking device. Summary: The Principal Software Engineer will be responsible for architecting, designing, developing, and maintaining user interface(s), user experience, and application software for our medical devices. The Principal Software Engineer will be required to work with cross-functional teams including systems, hardware, regulatory experts, and clinical specialists to ensure that our software solutions meet the highest standards of quality, safety, and performance. Duties & Responsibilities: * Leads and contributes to development of company objectives and principles to achieve goals in creative and effective ways * Focuses on providing thought leadership and works on broader organization projects, which requires understanding of wider business * Understands and works on complex issues where analysis of situations or data requires an in-depth evaluation of variable factors * Exhibits advanced wide-ranging experience, using in-depth professional knowledge, acumen, concepts, and company objectives to develop, resolve complex models and procedures * Recognized internally as a subject matter expert; May direct the activities of others * Architect, design, develop and debug User interface for medical device(s) * Develop and maintain documents for compliance with FDA regulations for class C medical device software * Software development on Linux or similar OS * Develop UI software using Design patterns