Senior Mobile Developer

Senior Mobile Developer

This role focuses on developing cross‑platform mobile applications for iOS and Android using native technologies and modern frameworks. The applications support more than 30 million active users and handle billions of financial transactions annually, facilitating the movement of trillions of dollars between parties.

• Transform the mobile apps from React Native and JavaScript to a more modern infrastructure while maintaining and developing ongoing features.
• Collaborate with other engineers to develop and maintain high‑quality native mobile applications.
• Write code in Swift and Kotlin for iOS and Android, respectively.
• Design and implement robust, scalable mobile solutions with state management and architecture patterns in an Agile environment.
• Implement features for financial and payment processing applications.
• Optimize app performance, memory management, and battery efficiency; implement localization for multi‑language support and encryption for sensitive data.
• Manage app build, deployment, push notifications, and analytics; ensure code quality through comprehensive testing and code reviews.
• Implement security best practices and PCI compliance standards; participate in code reviews, sprint planning, and architecture discussions.

• 5+ years of professional mobile development experience.
• 4+ years developing Android apps with Kotlin and/or iOS apps with Swift, plus React Native and JavaScript.
• Strong understanding of mobile app architecture, state management, and design patterns.
• Experience with RESTful APIs, asynchronous programming, encryption, data protection, and mobile security standards.
• Demonstrated work in Agile/Scrum environments.
• Knowledge of app deployment pipelines and CI/CD practices.
• Experience with analytics tools, mobile KPIs, push notification services, and Git version control.
• Bachelor’s degree or a minimum of 6 years of relevant experience.

• 2+ years of React Native and JavaScript or cross‑platform development experience.
• Experience with localization frameworks and multi‑language apps.
• Experience with app store optimization (ASO) and cloud platforms (AWS, Azure, GCP).
• Knowledge of advanced mobile testing frameworks.
• Experience in fintech or financial applications, payment processing systems, and encryption protocols.

• On‑site Monday through Friday; in‑person collaboration is essential.
• Approximately 10% travel to other office locations is expected.

• Must possess valid and unrestricted U.S. work authorization; candidates requiring sponsorship will not be considered.

$ – $. This range applies to employees in New Jersey and New York; ranges for other states may differ.

Fiserv is proud to be an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, national origin, gender, gender identity, sexual orientation, age, disability, protected veteran status, or any other category protected by law. It is unlawful to discriminate against a prospective employee due to the individual's status as a veteran.

If you have a disability and require a reasonable accommodation, please contact  Please note our AskHR representatives do not have visibility to your application status.

For incentive‑eligible associates, the successful candidate is eligible for an annual incentive opportunity which may be delivered as a mix of cash bonus and equity awards at the company’s sole discretion.