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Principal Mobile Developer
Principal Mobile Developer-December 2024
Durham
Dec 2, 2025
About Principal Mobile Developer

  Job Description:

  We're looking for product-aware developers who are passionate, inquisitive, and responsible individuals to help deliver the best mobile experience to our customers! The ideal candidate is deeply entrenched in mobile development, with a passion for leveraging the right tools and frameworks to guide the development of stable, robust, and resilient apps that best serve our customer base.

  The Team

  Our team builds amazing experiences for millions of Fidelity customers. We focus on creating rich and compelling native experiences leveraging the best iOS UI guidelines by way of robust tooling to provide deep, financial insights enabling 'on the go' financial management. We work in a collaborative and fast-paced environment, with a culture of learning, coaching and mentoring. We advance mobile-first strategies to delight our current and future customers.

  The Expertise You Have

  Robust critical thinking skills coupled with a desire for growth, to learn and to engage with peers in technical and design discussions6+ years of professional experience developing publicly available iOS apps using Swift 5 and/or Objective-CVerifiable experience as an iOS developer using Swift, Objective-C, Cocoa Touch, UIKit, and XCode in an agile environmentFluency in Swift object-oriented and/or functional programming from industry working experienceParticipated in the release of at least 1 publicly available app to the Apple App Store participating from inception to launch using automated tooling like Jenkins, Azure DevOps, and XCode toolchainExperience working in a team of iOS developers participating in code reviews, pull requests, and pair programming.Demonstrable experience mentoring and coaching other iOS developers in a collaborative and team-based organization.

  The Skills You Bring

  Your passion creating amazing experiences on iOS using Apple's Human Interface Guidelines using your strong understanding of functional programming and reactive patterns using Combine or RxSwiftYour desire to delight our clients with the latest mobile technologies using your deep knowledge of iOS architecture patterns including Clean Architecture and MVC. Experience with MVVM, VIPER, and SwiftUI a plus.Your knowledge of the mobile landscape, architectures, trends, and emerging technologies used in creating performant, resilient, and robust iOS appsExcellent understanding of computer science fundamentals, data structures, and algorithms to ensure adherence to software engineering best practices including object-oriented and functional programmingExcellent understanding of consuming RESTful web services, preferably using Apple-provided protocolsStrong understanding of modern development principles such as trunk-based development, feature toggles, and branch by abstraction to support performant and collaborative engineering teams.Strong understanding of CI/CD tools such as Jenkins, Azure DevOps, and Artifactory to continuously and autonomously deliver high-quality apps to guarantee stable and performant experiences.Ability to use a long-term mentality to help produce scalable, maintainable solutionsGood understanding of testing concepts and frameworks using XCTest and XCUITest, with a focus on DevSecOpsGood understanding of Apple's accessibility features and experience building accessible experiencesGood understanding of dependency management, using Swift Package Manager and/or CocoapodsExperience with SwiftUI and Firebase Crashlytics a plus

  The Value You Deliver

  Collaborating with architecture, security, and UXD to build architecturally compliant appsPartnering with platform squads to define mobile engineering standards, best practices, and toolingProviding mobile thought leadership to advance PI's mobile outcomes and facilitate a mobile-first mentalityServing as Mobile advocates for the adoption of experiences that solve the needs of our digitally minded customersStaying ahead of the curve by aligning architecture, user experience, and security with chapters and COEsSupporting a mobile-first world through upskilling and augmenting squads with deep mobile expertise

  Certifications:

  Company Overview

  Fidelity Investments is a privately held company with a mission to strengthen the financial well-being of our clients. We help people invest and plan for their future. We assist companies and non-profit organizations in delivering benefits to their employees. And we provide institutions and independent advisors with investment and technology solutions to help invest their own clients' money.

  Join Us

  At Fidelity, you'll find endless opportunities to build a meaningful career that positively impacts peoples' lives, including yours. You can take advantage of flexible benefits that support you through every stage of your career, empowering you to thrive at work and at home. Honored with a Glassdoor Employees' Choice Award, we have been recognized by our employees as a Best Place to Work in 2023. And you don't need a finance background to succeed at Fidelity-we offer a range of opportunities for learning so you can build the career you've always imagined.

  At Fidelity, our goal is for most people to work flexibly in a way that balances both personal and business needs with time onsite and offsite through what we're calling "Dynamic Working". Most associates will have a hybrid schedule with a requirement to work onsite at a Fidelity work location for at least one week, 5 consecutive days, every four weeks. These requirements are subject to change.

  We invite you to Find Your Fidelity at fidelitycareers.com.

  Fidelity Investments is an equal opportunity employer. We believe that the most effective way to attract, develop and retain a diverse workforce is to build an enduring culture of inclusion and belonging.

  Fidelity will reasonably accommodate applicants with disabilities who need adjustments to participate in the application or interview process. To initiate a request for an accommodation, contact the HR Accommodation Team by sending an email to accommodations @fmr.com, or by calling 800-835-5099, prompt 2, option 3.

  At Fidelity, we value honesty, integrity, and the safety of our associates and customers within a heavily regulated industry. Certain roles may require candidates to go through a preliminary credit check during the screening process. Candidates who are presented with a Fidelity offer will need to go through a background investigation and may be asked to provide additional documentation as requested. This investigation includes but is not limited to a criminal, civil litigations and regulatory review, employment, education, and credit review (role dependent). These investigations will account for 7 years or more of history, depending on the role. Where permitted by federal or state law, Fidelity will also conduct a pre-employment drug screen, which will review for the following substances: Amphetamines, THC (marijuana), cocaine, opiates, phencyclidine.

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