Senior Software Engineer - Finance Engineering

Do you want to help build some of the largest and most consequential enterprise and customer technology systems in the world? Join Apple's Information Systems and Technology (IS&T) organization.

IS&T is the engine behind everything Apple does for customers and for the people who build for them. It's Apple's central nervous system. Supporting 2.5 billion active Apple devices, processing billions of secure transactions, and keeping the technology that defines modern life running flawlessly, IS&T makes the impossible feel effortless.

Finance Engineering is the strategic technology partner for Apple's Finance function. The team works in close partnership with Finance to ensure alignment of our technology investments with evolving business priorities. They support the technology that powers our Finance teams, as well as widely used tools that employees rely on every day. Finance Engineering also supports Finance's transformation efforts, leading the technology evolution that will shape how Finance operates for years to come. While most financial systems simply record history, our platform executes it. We build the distributed core responsible for moving, routing, and settling money across our global ecosystem-transforming high-volume business transactions into compliant, auditable, and immutable financial flows.

As a Senior / Lead Backend Engineer, you will design the mission-critical distributed services powering this backbone: high-throughput payment rails, immutable sub-ledgers, transactional state machines, and end-to-end verification harnesses. You will partner directly with Platform Architects, Finance, Controllership, and Accounting.

The bar for engineering rigor here is absolute: the software you deploy moves real money at massive scale, where idempotency, zero-loss architecture, and continuous auditability are mandatory from day one. Core Financial Engine: Design, build, and operate high-throughput distributed services across the transaction lifecycle-ingestion, validation, matching, sub-ledger posting, settlement, and reconciliation. Financial Correctness & Auditability: Own data integrity end-to-end: double-entry ledger mechanics, immutable event streams, deterministic idempotency, and audit trails required for SOX compliance. Domain-Driven Architecture: Model canonical financial data schemas and externalize accounting/matching rules into versioned configurations so business logic can evolve without code deployments. Technical Leadership: Lead architecture RFCs for cross-team initiatives, raise engineering standards through code review and contract testing, and mentor engineers across the team.8 years of professional software development experience with a track record of building high-scale, fault-tolerant distributed backend systems. 8 years of professional software development experience with in Java or Kotlin / JVM ecosystems, including advanced knowledge of concurrency, memory management, garbage collection, and JVM performance tuning. 8 years of professional software development experience in Computer Science fundamentals: Object-oriented design, algorithms, data structures, and enterprise design patterns. 8 years of professional experience with database architecture skills: Advanced relational database schema design, index strategy, query optimization, and transaction isolation semantics (Postgres, Oracle, etc.), alongside distributed/NoSQL stores. 8 years of professional experience with Microservices & API Architecture: Proven experience with contract-first API design (RESTful, gRPC, Protobuf), backward-compatible schema versioning, and distributed transaction patterns (Outbox, Saga, CQRS). 8 years of professional experience with High-volume messaging & event streaming: Hands-on experience with event-driven architectures using Apache Kafka or equivalent distributed streaming engines. Bachelors Degree in Computer Science, Computer Engineering, or equivalent practical experience. Fintech & Ledger Experience: Prior experience building software ledgers, payment settlement rails, double-entry accounting engines, multi-currency balance tracking, or automated reconciliation systems. Resiliency & High Availability: Proven track record with multi-region deployments, active-active failover, zero-downtime database migrations, and chaos engineering. Influential Technical Leadership: Proven ability to lead cross-functional technical initiatives spanning multiple teams, communicate effectively with both engineering peers and executive business stakeholders, and mentor senior talent.