Senior Mobile Software Engineer, Growth

Fanatics Collectibles•Los Angeles, CA

About The Position

Fanatics is building a leading global digital sports platform. We ignite the passions of global sports fans and maximize the presence and reach for our hundreds of sports partners globally by offering products and services across Fanatics Commerce, Fanatics Collectibles, and Fanatics Betting & Gaming, allowing sports fans to Buy, Collect, and Bet. Through the Fanatics platform, sports fans can buy licensed fan gear, jerseys, lifestyle and streetwear products, headwear, and hardgoods; collect physical and digital trading cards, sports memorabilia, and other digital assets; and bet as the company builds its Sportsbook and iGaming platform. Fanatics has an established database of over 100 million global sports fans; a global partner network with approximately 900 sports properties, including major national and international professional sports leagues, players associations, teams, colleges, college conferences and retail partners, 2,500 athletes and celebrities, and 200 exclusive athletes; and over 2,000 retail locations, including its Lids retail stores. Our more than 22,000 employees are committed to relentlessly enhancing the fan experience and delighting sports fans globally. About the Team Topps.com is a flagship platform within Fanatics Collectibles. We're building the gold standard for collectors through immersive, commerce-integrated experiences across Topps, Fanatics Live, and Fanatics Collect. Our mission is to deliver performant systems, high design polish, and data-driven growth experiences that engage the next generation of fans. The Role We’re hiring a Senior Mobile Software Engineer to join the Growth Engineering team, focused on driving user acquisition, engagement, and retention across Topps, Fanatics Live, and Fanatics Collect. This role sits at the intersection of product experimentation, analytics, and mobile platform engineering. You will be responsible for ensuring the integrity and reliability of analytics data within our iOS and Android applications, while building and iterating on growth-focused features that directly impact the mobile user experience. You’ll work closely with product, data, and marketing teams to design, implement, and scale experimentation frameworks and growth initiatives across mobile platforms. This role reports to the Director of Engineering, Topps.

Requirements

5–8+ years of experience building and shipping production mobile applications.
Strong proficiency in both iOS and Android development (e.g., Swift/Objective-C and Kotlin/Java), or deep expertise in one with demonstrated ability to contribute to the other.
Experience implementing mobile analytics and tracking systems (e.g., event instrumentation, attribution, deep linking).
Familiarity with mobile experimentation tools, feature flagging, and remote configuration systems.
Experience building data-driven mobile features with measurable business impact.
Solid understanding of mobile architecture patterns, API integration, and performance optimization.
Strong collaboration skills and ability to work cross-functionally with product, analytics, and marketing teams.
Ability to operate in a fast-paced environment with a focus on delivering incremental value.

Nice To Haves

Experience working on growth engineering or product growth teams in a mobile-first environment.
Familiarity with analytics tools such as Segment, Amplitude, Firebase, or similar platforms.
Experience with cross-platform frameworks (e.g., React Native) alongside native development.
Strong understanding of app store ecosystems, release cycles, and experimentation constraints on mobile.
Exposure to consumer-facing apps with high scale and experimentation velocity.
Interest in collectibles, live commerce, or fan engagement platforms.

Responsibilities

Build and maintain native and/or cross-platform mobile features that drive user growth, engagement, and conversion across Topps, Fanatics Live, and Fanatics Collect.
Ensure analytics data integrity and consistency across iOS and Android, including event instrumentation, tracking validation, and attribution.
Design and implement mobile experimentation frameworks (A/B testing, feature flags, remote config) to support rapid iteration.
Partner with product, data science, and marketing teams to translate growth hypotheses into impactful mobile features.
Optimize mobile user experiences for performance, usability, and measurable impact on growth metrics (activation, retention, conversion).
Identify and resolve gaps in mobile analytics tracking and reporting, ensuring accurate insights for decision-making.
Contribute to shared services and APIs that power cross-platform growth initiatives.
Continuously improve mobile engineering practices, including release processes, observability, and developer tooling.

Stand Out From the Crowd

Upload your resume and get instant feedback on how well it matches this job.

Upload and Match Resume