Principal Software Engineer

This is where your work makes a difference.

At Baxter, we believe every person—regardless of who they are or where they are from—deserves a chance to live a healthy life. It was our founding belief in 1931 and continues to be our guiding principle. We are redefining healthcare delivery to make a greater impact today, tomorrow, and beyond.

Our Baxter colleagues are united by our Mission to Save and Sustain Lives. Together, our community is driven by a culture of courage, trust, and collaboration. Every individual is empowered to take ownership and make a meaningful impact. We strive for efficient and effective operations, and we hold each other accountable for delivering exceptional results.

Here, you will find more than just a job—you will find purpose and pride.

Role Summary

The Principal Software Engineer (Mobile) is a hands‑on technical leader responsible for the design, development, and evolution of mobile applications supporting both iOS and Android platforms using React Native with a background insecure voice calling.

Key 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.

Required Qualifications

• 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.

Preferred Qualifications

• 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.

Baxter is committed to supporting the needs for flexibility in the workplace. We do so through our flexible workplace policy which includes a required minimum number of days a week onsite. This policy provides the benefits of connecting and collaborating in-person in support of our Mission. The flexible workplace policy is subject to local laws and legal requirements. At its discretion, Baxter may decide to adjust, suspend, or discontinue as business needs change.

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