Software Engineer III

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 Sports book 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 Fanatics Markets
Fanatics Markets is the real-money prediction and trading app where you can invest in moments you care about. Built on a secure platform, we let users predict real-world outcomes and trade on events they actually follow - from sports and entertainment to political elections and beyond. Our mission is to redefine how fans engage with the moments and markets that matter most.

We're looking for the right people to help us build the future of prediction markets.

This Software Engineer role is an IC responsible for building and maintaining features across our full stack: the web application customers use to interact with our product, and the backend systems that power it. Whichever side you're strongest on, you'll have real room to build your reach into the other as you join a product at an exciting early stage, contributing to the product definition, technical foundations, and ways of working from scratch.

You'll contribute high-quality code and support best practices for AI-assisted development while building systems that can handle millions of events daily.

On the engineering side, we're pioneering the use of AI as a code collaborator. We need engineers who are proficient in using tools like Claude Code, Codex, Git Hub Copilot, or similar to ship production code efficiently while maintaining high quality standards.

• Design, develop, test, and deploy scalable, high-quality experiences — whether that's front-end work in React, Next.js, and modern Type Script, or backend work in Go (modeling data for markets, orders, and transactions) — while making meaningful contributions on the other side of the stack too
• Contribute to the technical evolution of our Markets platform, partnering with product and design to deliver engaging, performant, and accessible features
• Implement and support features end-to-end: implementation → instrumentation → deployment → monitoring → iteration based on metrics
• Implement and maintain experimentation capabilities (feature flags, A/B tests) to validate ideas quickly and safely
• Integrate with backend APIs and collaborate with platform teams to build reliable, observable systems
• Participate in code reviews, focusing on code quality, readability, and maintainability
• Leverage AI tools to accelerate development velocity while maintaining high standards for security, correctness, and performance
• Follow and help improve team standards for AI usage (prompt patterns, code review checklists, validation strategies)
• Contribute effectively to an early-stage…