Principal Mobile Developer
Confirmed on the employer's own hiring board on Nov 4, 2026. First seen by Alion on Nov 4, 2026. Fidelity Investments scores A on the Alion truth index.
Fidelity will not provide immigration sponsorship for this position.
Job Description:
Position Description:
Architects the development of enterprise-scale Android applications by applying advanced Android User Interface (UI) guidelines and robust tooling to enable secure, real-time financial management, while driving technical strategy across multiple teams. Designs and evolves complex application architectures and takes a lead role in building automation pipelines leveraging DevOps principles and Continuous Integration and Continuous Delivery (CI/CD) tools. Guides the adoption and implementation of Android design patterns, including Clean Architecture, Model-View-View Model (MVVM), and Model-View-Intent (MVI), while establishing quality standards through comprehensive testing with JUnit, Espresso, and Mockito. Provides senior-level technical guidance through architectural governance, code reviews, and mentorship. Advances platform capabilities using Coroutines, Jetpack Compose, and Kotlin Multiplatform Mobile (KMM). Ensures scalability, performance, and maintainability across mission-critical mobile solutions.
Primary Responsibilities:
- Develops tools, patterns, and reusable components to help the organization create performant, resilient, and robust applications.
- Partners with platform squads and architecture to define mobile engineering standards, best practices, and tooling.
- Proactively aligns architecture, user experience, and security to stay in sync with industry trends.
- Participates in the development of reusable components for the purpose of accelerating other engineers, increasing stability and resiliency of the application, and reducing time-to-market.
- Collaborates with teams through technical coaching and mentoring to help them build architecturally compliant applications.
- Provides mobile thought leadership to advance mobile outcomes and facilitate a mobile-first approach.
- Advocates for the adoption of experiences that solve the needs of digitally minded customers.
- Provides technical coaching for adherence to software engineering best practices, including patterns (Object-Oriented and functional programming), and methodologies (Test-Driven Development).
- Applies modern design patterns (Clean Architecture) to build multi-module applications.
Education and Experience:
Bachelor’s degree in Computer Science, Engineering, Information Technology, Information Systems, Data Science, or a closely related field (or foreign education equivalent) and five (5) years of experience as a Principal Mobile Developer (or closely related occupation) performing native Android application development using Kotlin and Java, modern Android UI frameworks, automated build tooling, AI assisted development practices, and cloud based mobile services in an enterprise software engineering environment.
Or, alternatively, Master’s degree in Computer Science, Engineering, Information Technology, Information Systems, Data Science, or a closely related field (or foreign education equivalent) and three (3) years of experience as a Principal Mobile Developer (or closely related occupation) performing native Android application development using Kotlin and Java, modern Android UI frameworks, automated build tooling, AI assisted development practices, and cloud based mobile services in an enterprise software engineering environment.
Skills and Knowledge:
Candidate must also possess:
· Demonstrated Expertise developing native Android applications using Kotlin and Java; performing UI development with Jetpack Compose and Material Design principles; and implementing MVVM architecture for scalable and maintainable codebases, using Android Studio, Gradle, and Jetpack libraries (ViewModel, LiveData, and Navigation).
· Demonstrated Expertise developing custom Gradle and Android Studio plug-ins to automate build and release processes, enforce coding and architectural standards, and increase developer productivity.
· Demonstrated Expertise leveraging AI-driven development tools (GitHub Copilot and Google Gemini) to accelerate feature development, improve code quality, and enhance both developer and end-user experience.
· Demonstrated Expertise architecting and implementing modular, scalable Android applications using Kotlin and Java in accordance with industry-standard design patterns and engineering best practices; leveraging GitHub for source control, versioning, and collaborative code reviews to maintain high-quality codebases; and utilizing Firebase services (Authentication, Crashlytics, Cloud Messaging, or Remote Config) to enhance application stability, performance, and feature delivery.
Fidelity’s Onsite Working Model
Fidelity is transitioning to a full-time onsite working model through a phased rollout across regions and roles. Currently, some roles and locations require 100% onsite presence, while others require less. Onsite expectations are likely to evolve as the rollout continues. This transition does not apply to fully remote roles.
Certifications:
Category:
Information TechnologyPlease be advised that Fidelity’s business is governed by the provisions of the Securities Exchange Act of 1934, the Investment Advisers Act of 1940, the Investment Company Act of 1940, ERISA, numerous state laws governing securities, investment and retirement-related financial activities and the rules and regulations of numerous self-regulatory organizations, including FINRA, among others. Those laws and regulations may restrict Fidelity from hiring and/or associating with individuals with certain Criminal Histories.