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About the Role

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 in secure voice calling.

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.

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.
Applicants must be authorized to work for any employer in the U.S. We are unable to sponsor or take over sponsorship of an employment visa at this time.

Skills

React Native
JavaScript
TypeScript
iOS development
Android development
REST APIs
WebSockets
SignalR
real-time voice communication technologies
HIPAA-aligned security practices
JIRA
Confluence
JAMA
GitHub
PostgreSQL
WebRTC
SIP
VoIP
Figma

Location

Onsite (minimum required days per week)

Work Type

Flexible Workplace Policy

Experience Level

5+ years of professional software engineering experience
Significant mobile application development experience

Education Level

Bachelor’s degree in Computer Science, Software Engineering, or a related discipline

Salary/Compensations

$120,000 to $165,000 annually

Benefits

Medical and dental coverage that start on day one
Basic life insurance
Accident insurance
Short-term disability insurance
Long-term disability insurance
Business travel accident insurance
Employee Stock Purchase Plan (ESPP)
401(k) Retirement Savings Plan (RSP) with 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 (EAP)
Childcare benefits

About the Company

At Baxter, we believe every person—regardless of who they are or where they are from—deserves a chance to live a healthy life.
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.

Equal Opportunity

Baxter is an equal opportunity employer. Baxter evaluates qualified applicants without regard to race, color, religion, gender, national origin, age, sexual orientation, gender identity or expression, protected veteran status, disability/handicap status or any other legally protected characteristic.
Know Your Rights: Workplace Discrimination is Illegal
Reasonable Accommodations: Baxter is committed to working with and providing reasonable accommodations to individuals with disabilities globally. If, because of a medical condition or disability, you need a reasonable accommodation for any part of the application or interview process, please click on the link here and let us know the nature of your request along with your contact information.
Recruitment Fraud Notice: Baxter has discovered incidents of employment scams, where fraudulent parties pose as Baxter employees, recruiters, or other agents, and engage with online job seekers in an attempt to steal personal and/or financial information. To learn how you can protect yourself, review our Recruitment Fraud Notice.