Staff Engineer, Balance and Ledger - Core

About the role

About Us

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.

Overview

Fanatics Betting & Gaming (FBG) is the online and retail sports betting subsidiary of Fanatics Holdings, Inc. As a Staff Engineer on the Balance and Ledger team, you will be the technical owner of the ledger and balance services that hold customer funds across Fanatics.

Balance and Ledger will be a shared ledger and a customer-level balance that can be used across Sportsbook and Casino, Markets, and other LOBs. You will design the systems that make this possible: a ledger that is correct and auditable, a balance model that enforces which funds can be used where, and a migration path that moves existing wallets onto the shared platform without disrupting customers.

This role combines deep backend expertise with architectural leadership. You will set the technical direction for the balance platform, work closely with Payments, Fraud, Responsible Gaming, Finance, Legal, and Compliance partners, and guide engineers across several teams as new businesses adopt the shared ledger.

Responsibilities

- Own the architecture of the ledger and balance services, including the data model, consistency guarantees, and the interfaces other businesses use to read balances and authorize spend.

- Design and build distributed services in Java and Spring Boot that handle high transaction volume with strict correctness, idempotency, and auditability requirements.

- Model funds by type and eligibility, so that each portion of a customer's balance is usable only where client, product, customer location, and transaction type allow, and so that a regulator-driven restriction can be applied quickly and safely.

- Lead the migration of existing business wallets onto the shared ledger in phases, including dual-running, reconciliation, cutover, and rollback plans that avoid customer-visible downtime.