Staff Engineer, Balance and Ledger - Core

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.
• Architect event-driven integration using java and architectural patterns so that balance changes are published reliably and downstream consumers can depend on ordering and delivery.
• Carry responsible gaming protections with the balance, working with the Responsible Gaming and Fraud teams so that limits, self-exclusion, and other customer protections remain enforced as funds are used across businesses.
• Work with Finance, Legal, and Compliance on how funds are attributed between businesses, how settlement and chargebacks are handled, and what data may be shared across Fanatics entities.
• Build for reconciliation and audit, including complete transaction histories, financial reporting feeds, and tooling that lets Operations and Finance verify balances independently.
• Lead technical initiatives that span multiple teams, and run architectural reviews, design sessions, and incident postmortems.
• Mentor engineers and raise the standard for security, observability, reliability, and testing across the platform.
• Partner with product, frontend, and mobile teams so that balance behavior is clear and consistent in every customer-facing experience.
• Be open to occasional travel to Fanatics offices or industry events for planning, collaboration, and team development.

Required Qualifications

• 8+ years of professional software engineering experience, with deep expertise in Java and Spring Boot.
• Experience designing and operating a ledger, wallet, balance service, or another financial system of record where correctness and auditability are requirements.
• Strong command of transactional consistency, idempotency, concurrency control, and relational data modeling in systems that cannot lose or double-count a transaction.
• Experience building event-driven systems and working with message streaming platforms such as Kafka.
• Demonstrated success setting technical direction and driving alignment across multiple teams.
• Experience migrating live, high-traffic systems with minimal customer impact.
• Ability to explain complex technical tradeoffs clearly to engineering, product, finance, and leadership audiences.
• Comfort working in a fast-paced, regulated environment with changing priorities.

Preferred Qualifications

• Experience in online gaming, sports betting, fintech, banking, or payments.
• Experience with a shared platform used by several business units, including managing adoption, versioning, and ownership boundaries.
• Experience with financial reconciliation, settlement, or accounting-oriented data models.
• Familiarity with data privacy and consent requirements when customer data moves between legal entities.
• Experience with AWS, Kubernetes, and observability tooling such as Datadog, Grafana, or CloudWatch.
• Interest in developer experience, clean API design, and systems that remain maintainable as more teams depend on them.

Depending on the role, your interview and onboarding experience may include in-person components, such as onsite interviews or Launching into Better: LIVE—a multi-day cultural immersion in New York City for full-time, non-seasonal hires. These sessions are designed to build connection and bring our culture to life, though specific travel and participation requirements will be confirmed based on your role and location. Your recruiter will provide clear guidance at each stage of the process.

For information about our benefits, please visit https://benefitsatfanatics.com/

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