Full Stack Engineer, Growth

The role

This engineer will drive user acquisition, engagement, retention, and experimentation across Topps, Fanatics Live, and Fanatics Collect. They will design and deliver scalable full stack solutions and contribute to experimentation infrastructure.

What you will do

• Design, build, test, deploy, and maintain full stack features for user growth and conversion.
• Develop scalable frontend and backend solutions using modern web technologies.
• Ensure analytics data integrity across platforms including instrumentation and tracking pipelines.
• Design and implement experimentation capabilities like A/B testing frameworks and feature flags.
• Partner cross-functionally with Product, Data Science, Analytics, and Marketing teams.
• Optimize web and mobile experiences for performance and usability.
• Identify and resolve issues impacting data quality and experimentation accuracy.
• Participate in system design discussions and architectural decisions.
• Contribute to shared platform capabilities for cross-product growth.
• Participate in code reviews, operational support, and technical documentation.

Required qualifications

• 5+ years of professional experience building and scaling modern web applications.
• Proficiency in JavaScript/TypeScript, React, Node.js, or equivalent modern frameworks.
• Experience designing and maintaining analytics tracking systems, event instrumentation, and attribution pipelines.
• Experience building scalable APIs, distributed systems, and performant consumer-facing applications.
• Familiarity with A/B testing frameworks, experimentation platforms, and feature flagging systems.
• Strong understanding of system architecture, API design, observability, and performance optimization.
• Experience collaborating cross-functionally with Product, Analytics, Data Science, and Marketing stakeholders.
• Ability to independently drive technical solutions from design through production deployment.
• Strong debugging, problem-solving, and communication skills.
• Bachelor’s degree in Computer Science, Engineering, or related technical field, or equivalent practical experience.

Nice to have

• Experience working on Growth Engineering or product growth-focused teams.
• Familiarity with tools such as Segment, Amplitude, Snowflake, or similar analytics and experimentation platforms.
• Experience building for mobile platforms, including React Native, native mobile applications, or mobile web optimization.
• Experience supporting high-traffic consumer-facing platforms with rapid experimentation cycles.
• Interest in collectibles, live commerce, fan engagement, or marketplace platforms.

About the company

Fanatics is building a leading global digital sports platform. Fanatics Collectibles is a new company operating at the intersection of collectibles, culture, and technology.