Principle Software Engineer (Java)

Business Unit

Cubic Transportation Systems

Company Details

When you join Cubic, you become part of a company that creates and delivers technology solutions in transportation to make people’s lives easier by simplifying their daily journeys, and defense capabilities to help promote mission success and safety for those who serve their nation. Led by our talented teams around the world, Cubic is committed to solving global issues through innovation and service to our customers and partners.

We have a top-tier portfolio of businesses, including Cubic Transportation Systems (CTS) and Cubic Defense (CD). Explore more on Cubic.com.

Job Details

Principal Software Engineer — Java

Lead architecture, design, and hands-on delivery for a security-critical, multi-tenant fintech platform that issues and manages virtual payment/transit cards across mobile wallets (Apple Wallet, Google Wallet) and EMV/contactless systems — including card tokenization and HSM-backed cryptography. You'll own technical direction across the full lifecycle and raise the engineering bar for payment-grade systems.

Essential Duties and Responsibilities

• Own architecture and design for scalability, security, and performance across a schema-per-tenant multi-tenant platform.
• Provide hands-on technical leadership end to end, in a domain where financial and cryptographic correctness is paramount.
• Build and evolve core subsystems using Java 17/21, Java EE, Spring / Spring Boot: virtual card lifecycle, payment tokenization (e.g., Mastercard MDES), key management, and wallet provisioning (APNs, Google Wallet).
• Ensure reliable external integrations — card networks, key-management/HSM services, device notification, and downstream REST/SOAP endpoints — with retries, timeouts, and idempotency.
• Design messaging/integration with Kafka and Apache Camel; caching with Redis.
• Own data design and performance across PostgreSQL and Oracle (Liquibase migrations, Hibernate/JPA tuning).
• Produce design docs, architecture diagrams, and threat models; mentor engineers on coding and secure-coding standards.
• Drive CI/CD with Jenkins (pipeline-as-code), Gradle, and Docker.

Required Skills & Qualifications

• 10+ years in software development with strong Java; 3+ years in technical leadership/architecture.
• Bachelor's in Computer Science, Engineering, or related field.
• Deep hands-on Java EE, Spring Boot, and Spring on long-lived, service-oriented backends.
• Solid security & cryptography: TLS/PKI, key management, HSMs, encryption/signing, secure handling of sensitive data.
• PostgreSQL and Oracle (SQL Server a plus) with Hibernate/JPA; multi-tenant data experience strongly preferred.
• REST and SOAP integration design with resilient outbound-call patterns.
• Containerization (Docker, Kubernetes) and service-oriented/microservices architecture.
• Strong grasp of concurrency, transactions, and distributed-system failure modes.
• Excellent problem-solving, communication, and leadership.

Preferred Qualifications

• Fintech/payments: EMV, contactless, card tokenization (MDES or equivalent), PCI-aware development.
• Mobile wallet provisioning: Apple Wallet (APNs), Google Wallet, or similar device-tokenization flows.
• Production Kafka, Camel, Redis; Gradle builds; observability with Micrometer/Prometheus and Log4j2.
• Front-end exposure (Angular, Node.js); IaC (Terraform, Ansible) / ARM / CloudFormation.

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Worker Type

Employee‎

We are committed to creating an inclusive workplace and welcome applications from people of all backgrounds. We do not discriminate based on any protected characteristic under applicable law.