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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Full Stack Engineer, Growth - **Company:** Fanatics Inc - **Location:** Los Angeles, CA, United States - **Experience:** Expert - **Salary:** $144,640.0 - $180,000.0 - **Contract:** Permanent contract - **Skills:** JavaScript (Programming Language), A/B Testing, Data Analysis, IOS Applications, Node.Js, Performance Tuning, Systems Architecture, TypeScript, Web Applications, Web Performance Optimization, Web Services, ReactJS, Snowflake, Backend, React Native, Front End Software Development, Api Design - **Published:** May 30, 2026 - **Apply:** https://www.indeed.com/viewjob?jk=4db846d2b2ef5efc ## About the Role Do you have experience in Web services design?, * 5-8+ years of experience building and scaling modern web applications across frontend and backend. * Strong proficiency in full stack development (e.g., JavaScript/TypeScript, React, Node.js, or similar technologies). * Experience implementing and maintaining analytics tracking systems (e.g., event pipelines, tagging, attribution). * Familiarity with A/B testing frameworks, experimentation platforms, and feature flagging systems. * Experience building data-informed product features with measurable business * Solid understanding of API design, system architecture, 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, * Experience working on growth engineering or product growth teams. * Familiarity with tools such as Segment, Amplitude, Snowflake, or similar analytics/data * Experience building for mobile platforms (React Native, native iOS/Android, or mobile web optimization). * Exposure to consumer-facing products with high traffic and experimentation velocity. * Interest in collectibles, live commerce, or fan engagement ## Description We're hiring a Senior Full Stack Software Engineer to join the Growth Engineering team, focused on driving useracquisition, engagement, and retention across Topps, Fanatics Live, and Fanatics Collect. This role sits at the intersection of product experimentation, analytics, and platform engineering. You will beresponsible for ensuring the integrity and reliability of analytics data across platforms, while building and iterating on growth-focused features for both web and mobile experiences. You'll work closely with product, data, and marketing teams to design, implement, and scale experimentation frameworks and growth initiatives. This role reports to the Director of Engineering, Topps., * Build and maintain full stack features that drive user growth, engagement, and conversion across Topps, Fanatics Live, and Fanatics Collect. * Ensure analytics data integrity and consistency across platforms, including instrumentation, tracking pipelines, and validation frameworks. * Design and implement experimentation frameworks (A/B testing, feature flags, ) to enable rapid iteration on growth initiatives. * Partner with product, data science, and marketing teams to translate growth hypotheses into scalable technical solutions. * Develop and optimize web and mobile experiences with a focus on performance, usability, and measurable impact on key growth metrics. * Identify and resolve gaps in data tracking, attribution, and reporting that impact decision-making. * Contribute to shared platform capabilities that support cross-product growth initiatives. * Continuously improve engineering velocity through tooling, automation, and best ## Related Videos - [Watch Tests Go Brrrr! : Getting Started with Cypress in ReactJS](https://www.wearedevelopers.com/videos/282-watch-tests-go-brrrr-getting-started-with-cypress-in-reactjs) - [Developing the Backend with Stefan Lingler, CTO at Shpock](https://www.wearedevelopers.com/videos/100360-developing-the-backend-with-stefan-lingler-cto-at-shpock) - [Stop using Node.js like in 2020! 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