Software System Engineer

* Position is located on-site in Irvine, CA*

Willow is a health and wellness innovator harnessing the power of artificial intelligence and clinical evidence to drive meaningful change in healthcare. We are using cutting-edge technology, data, and a highly engaging user experience to revolutionize chronic disease management and prevention. We are looking for an experienced Software Systems Engineer to join our growing team. We are looking for strong talent to help us create novel life-changing digital health solutions for our users.

We hire creative people and give them autonomy to do great work. The ideal candidate combines technical expertise, systems thinking, and agile leadership with a passion for building world‑class connected medical technology that serves users, clinicians and patients worldwide.

• Play a critical role in the software architecture, design, and development of our mobile apps.
• Translate product strategy and customer needs into system requirements and user stories that drive design and implementation.
• Partner with business, clinical, and engineering leaders to deliver scalable, compliant, and effective solutions that meet clinical, regulatory, and business goals
• Manage and refine system and software requirements to maintain clear traceability across design, implementation, verification, and risk management activities.
• Participate in architecture, design, and integration reviews to ensure proposed solutions meet functional, usability, performance, and regulatory expectations.
• Contribute to the definition and continuous improvement of requirements management and systems‑engineering processes, supporting consistency across teams and products.
• Lead or support process‑improvement initiatives that enhance development efficiency, product quality, and cross‑functional collaboration.
• Contribute to a knowledge‑sharing and an open and collaborative work environment.

• 5+ years of experience in technical, product‑oriented engineering role with a strong focus on requirements engineering.
• Proven expertise in requirements elicitation, analysis, specification, and validation.
• Demonstrated ability to gather, define, and document business, software, and system requirements.
• Experience with requirements management tools (e.g., Jira, Confluence, Jama, DOORS) and version control systems
• Understanding of version control and requirement traceability practices
• Understanding of system architectures, including how components interact across embedded systems, mobile applications, APIs, and cloud or on‑premises services.
• Awareness of software‑quality and regulatory standards applicable to medical devices (e.g., IEC 62304, ISO 14971).
• Experience building and improving requirements‑management frameworks and effectively using enterprise tools to support traceability and change control.
• Strong understanding of Agile methodologies and modern software development best practices.
• Excellent written and verbal communication skills, with the ability to present complex concepts clearly to technical and non‑technical audiences.

• 8+ years of experience in software, systems engineering, or technical product management roles, including exposure to regulated or safety‑critical environments.
• Ability to critically evaluate software system designs, identify architectural trade‑offs, integration risks, security implications, and performance considerations.
• Demonstrated ability to mentor peers, influence technical decision‑making, and drive process or architecture improvements across teams.
• Experience in a startup, early‑stage, or high‑growth environment.
• CSPO Certified or equivalent

• Bachelor’s Degree or higher in Computer Science, Biomedical Engineering or other related degree

This position primarily works in an office environment. It requires frequent sitting, standing and walking. Daily use of computers and other computing and digital devices is required. May stand for extended periods when facilitating meetings or walking in the facilities. Some local travel is necessary; therefore, the ability to operate a motor vehicle and maintain a valid Driver’s license is required.

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 accommodations may be made for those individuals with real or perceived disabilities to perform the essential functions of the job described.