Lead Ledger & Balance Systems Engineer

Fanatics Inc.; New York (NY); On-site; USD 190,000 - 238,000; Full time

Job summary

Fanatics Inc. in New York City seeks a Staff Engineer to own the ledger and balance services that hold customer funds across Fanatics Betting & Gaming. You will design a shared ledger, enforce balance usage rules across businesses, migrate wallets with minimal downtime, and guide multiple teams through architectural decisions.

This role demands deep backend expertise and strong Java/Spring Boot skills, plus a track record leading large-scale financial systems in a regulated environment.

Qualifications

• 8+ years of professional software engineering with Java and Spring Boot.
• Experience designing and operating ledger, wallet, or financial systems of record.
• Strong understanding of transactional consistency, idempotency, and data modeling.
• Experience building event-driven systems and using Kafka.
• Proven ability to steer technical direction across multiple teams.
• Experience migrating live high-traffic systems with minimal customer impact.
• Ability to explain tradeoffs clearly to engineering, product, finance and leadership.
• Comfort in a fast-paced, regulated environment.

Responsibilities

• Own the architecture of the ledger and balance services, including data models and interfaces.
• Design and build distributed Java/Spring Boot services for high throughput with correctness and auditability.
• Model funds by type and eligibility to enforce usable balance across contexts.
• Lead wallet migrations with dual-running, reconciliation, cutover, and rollback plans.
• Architect event-driven integration ensuring ordering and reliable delivery.
• Maintain responsible gaming protections as funds are used across businesses.
• Collaborate with Finance, Legal, Compliance on data sharing and settlement rules.
• Build for reconciliation and audit with complete transaction histories and feeds.
• Lead multi-team architectural reviews and incident postmortems; mentor engineers.
• Partner with product, frontend, and mobile teams for consistent balance behavior.
• Occasional travel to Fanatics offices or events as needed.

Skills

Java

Spring Boot

Ledger design

High-availability systems

Event-driven architecture

Kafka

Technical leadership

Cross-team collaboration

Regulated environment

System migration

Tools

AWS

Kubernetes

Datadog

Grafana

CloudWatch

Job description

Fanatics Inc. in New York City seeks a Staff Engineer to own the ledger and balance services that hold customer funds across Fanatics Betting & Gaming. You will design a shared ledger, enforce balance usage rules across businesses, migrate wallets with minimal downtime, and guide multiple teams through architectural decisions.

This role demands deep backend expertise and strong Java/Spring Boot skills, plus a track record leading large-scale financial systems in a regulated environment.