Principal Software Engineer, Mobile Platform

Job Description

At FIS, our technology and our people are moving forward. We advance the way the world pays, banks and invests. We believe in building inclusive, diverse teams. Together, we innovate to help our colleagues, clients and communities succeed. If you’re ready to grow your career and make an impact in fintech, we have one question: Are you FIS? 

About the Role 

You will define the architecture and technical direction for a mobile platform that product teams across FIS build on, supporting secure, scalable financial applications. You will lead engineering across native iOS, native Android and React Native technologies while establishing reusable capabilities, standards and delivery practices. As a principal engineer, you will solve complex platform challenges and influence mobile strategy across engineering, product, security and operations. Success means enabling teams to deliver reliable, accessible and high-performing mobile experiences efficiently. 

What You Will Be Doing 

• Define the architecture and technical strategy for enterprise mobile platforms and applications. 

• Lead the evaluation of FIS’s mobile framework strategy, native vs. cross-platform, as AI-assisted development changes the tradeoffs. 

• Establish standards for native iOS, native Android and React Native development. 

• Design reusable frameworks, libraries, services and developer tooling for mobile engineering teams. 

• Guide application architecture using Swift, Kotlin and modern React Native patterns. 

• Lead decisions involving security, privacy, scalability, accessibility and application performance. 

• Establish continuous integration and delivery capabilities using Bitrise and complementary automation tools. 

• Improve automated testing, code quality, observability and release reliability across mobile applications. 

• Guide application signing, provisioning and releases through Apple and Google application stores. 

• Partner with product, design, security and platform teams to deliver consistent mobile experiences. 

• Partner with Design to deliver the design system’s mobile components and tokens. 

• Evaluate AI-assisted capabilities that improve mobile development, testing and operational workflows. 

• Lead resolution of complex architecture, integration, performance and production reliability challenges. 

• Coach senior engineers and technical leads while strengthening mobile engineering practices. 

What You Will Need 

• Extensive experience architecting and delivering complex, production-grade mobile applications. 

• Advanced expertise in at least one native platform (Swift or Kotlin), with working depth in the other. 

• React Native experience. 

• Proven engineering leadership across mobile architecture, platform strategy and technical standards. 

• Experience implementing mobile continuous integration and delivery pipelines, including Bitrise. 

• Deep knowledge of mobile security, accessibility, performance, testing, observability and release management. 

• Hands-on experience with AI coding tools and a point of view on how they change mobile engineering. 

• Degree in Computer Science, engineering or a related field, or equivalent practical experience. 

Added Bonus if You Have 

• Experience developing mobile platforms or applications within banking, payments or financial services. 

• Experience releasing and maintaining applications through the Apple App Store and Google Play. 

• Knowledge of iPadOS, macOS and the broader Apple development ecosystem. 

• Experience integrating mobile applications with APIs, identity platforms and cloud-based services. 

• Familiarity with secure software development practices for regulated financial environments. 

• Experience with mobile app integrity and attestation (Apple App Attest, Google Play Integrity) and secure secrets handling. 

What We Offer You 

At FIS, you can grow your career as far as you want to take it. Here’s what else we offer: 

• Opportunities to make an impact in fintech 

• Personal and professional learning 

• Inclusive, diverse work environment 

• Resources to give back to your community 

• Competitive salary and benefits 

Privacy Statement

FIS is committed to protecting the privacy and security of all personal information that we process in order to provide services to our clients. For specific information on how FIS protects personal information online, please see the Online Privacy Notice.

EEOC Statement

FIS is an equal opportunity employer. We evaluate qualified applicants without regard to race, color, religion, sex, sexual orientation, gender identity, marital status, genetic information, national origin, disability, veteran status, and other protected characteristics. The EEO is the Law poster is available here supplement document available here

For positions located in the US, the following conditions apply. If you are made a conditional offer of employment, you will be required to undergo a drug test. ADA Disclaimer: In developing this job description care was taken to include all competencies needed to successfully perform in this position. However, for Americans with Disabilities Act (ADA) purposes, the essential functions of the job may or may not have been described for purposes of ADA reasonable accommodation. All reasonable accommodation requests will be reviewed and evaluated on a case-by-case basis.

Sourcing Model

Recruitment at FIS works primarily on a direct sourcing model; a relatively small portion of our hiring is through recruitment agencies. FIS does not accept resumes from recruitment agencies which are not on the preferred supplier list and is not responsible for any related fees for resumes submitted to job postings, our employees, or any other part of our company.

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