Principal Software Engineer
About The Position
The Principal Software Engineer (Mobile) is a hands-on technical leader responsible for designing, developing, and evolving Mercury mobile applications for iOS and Android using React Native, with a background in secure voice calling. The role leads mobile architecture and development, implements secure voice capabilities, and integrates applications with real-time communications services. It addresses mobile voice behavior and reliability while ensuring functional parity and consistent experiences across platforms. The engineer collaborates with backend, web, UX, QA, cybersecurity, regulatory, and product stakeholders; applies HIPAA-aligned security practices; participates in Agile processes; and contributes to design controls, requirements traceability, verification, and validation documentation. The role includes code reviews, mentoring, and support for production readiness, monitoring, troubleshooting, and resolution of issues in live healthcare environments. Baxter describes a flexible workplace policy that requires a minimum number of onsite days per week, subject to local laws and business needs. The estimated base salary is $120,000 to $165,000 annually, and the role may be eligible for discretionary bonuses. Applicants must be authorized to work for any employer in the U.S.; visa sponsorship is unavailable.
Requirements
- Bachelor’s degree in Computer Science, Software Engineering, or a related discipline and 5+ years of professional software engineering experience, including significant mobile application development experience.
- Proven expertise with React Native and modern JavaScript/TypeScript development.
- Strong experience developing for both iOS and Android platforms.
- Strong experience integrating mobile applications with backend systems using REST APIs and real-time communication technologies.
- Experience designing or supporting mobile voice calling, VoIP, WebRTC, or comparable real-time communications functionality.
- Experience with mobile audio behavior, call state management, operating-system permissions, push notifications, and background execution.
- Experience working in regulated environments, preferably healthcare or life sciences.
- Proficiency with GitHub, PostgreSQL at the application consumption or interaction layer, and collaborative development workflows.
Nice To Haves
- Hands-on experience integrating mobile applications with real-time communications platforms.
- Experience with WebRTC, SIP, VoIP, media sessions, call signaling, or voice gateway integrations.
- Experience building secure communication, clinical communication, messaging, or alerting applications.
- Familiarity with iOS and Android native audio, telephony, push notification, and background-processing APIs.
- Experience troubleshooting real-time voice quality, connectivity, latency, reconnection, and device compatibility issues.
- Familiarity with mobile deployment pipelines, release management, and mobile application lifecycle management.
- Understanding of healthcare workflows, clinical environments, nurse call, patient-care communications, or medical-device integrations.
- Experience collaborating with UX design using Figma.
- Experience leading technical designs, architecture reviews, and cross-functional engineering initiatives.
Responsibilities
- Lead the architecture, development, and enhancement of Mercury mobile applications using React Native for iOS and Android.
- Design and implement secure voice calling capabilities across iOS and Android.
- Integrate Mercury mobile applications with real-time communications services.
- Address mobile voice concerns including call signaling, session lifecycle, audio routing, connectivity changes, permissions, notifications, background behavior, and call reliability.
- Ensure functional parity and a consistent user experience across both mobile platforms.
- Collaborate with backend, web, UX, QA, cybersecurity, regulatory, and product stakeholders.
- Design and implement integrations using REST APIs, WebSockets, SignalR, and real-time voice communication technologies.
- Apply HIPAA-aligned security practices for data handling, authentication, voice communications, messaging, and notifications.
- Participate in Agile development ceremonies and work tracking using JIRA and Confluence.
- Contribute to design controls, requirements traceability, verification, and validation documentation using JAMA.
- Perform rigorous code reviews and champion mobile engineering best practices.
- Mentor engineers and raise the overall quality and consistency of mobile development.
- Support production readiness, monitoring, troubleshooting, and issue resolution in live healthcare environments.
Benefits
- Medical and dental coverage starting on day one
- Basic life, accident, short-term and long-term disability, and business travel accident insurance
- Employee Stock Purchase Plan with the ability to purchase company stock at a discount
- 401(k) Retirement Savings Plan with employee contributions and company matching
- Flexible Spending Accounts
- Educational assistance programs
- Paid holidays
- Paid time off ranging from 20 to 35 days based on length of service
- Family and medical leaves of absence
- Paid parental leave
- Commuting benefits
- Employee Discount Program
- Employee Assistance Program
- Childcare benefits
- Potential eligibility for discretionary bonuses
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What This Job Offers
Job Type
Full-time
Career Level
Principal
