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. ‎ 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. Cubic creates and delivers technology solutions in transportation that make people’s lives easier by simplifying their daily journeys, and defense capabilities that 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 challenges 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). CTS is an industry-leading integrator of payment and information solutions and related services for intelligent travel applications. CTS delivers integrated systems for transportation and traffic management, delivering tools for travelers to choose the smartest and easiest way to travel and pay for their journeys, and enabling transportation authorities and agencies to manage demand across the entire transportation network. Cubic Defense provides networked Command, Control, Communications, Computers, Cyber, Intelligence, Surveillance and Reconnaissance (C5ISR) solutions, and live, virtual, constructive and game-based training solutions for both U.S. and Allied Forces. These mission-inspired capabilities enable assured multi-domain access; converged digital intelligence; and superior readiness for defense, intelligence, security and commercial missions. Cubic is proud to have a presence in over 60 countries and employ over 5,000 people worldwide. We are committed to hiring and retaining a diverse workforce and are proud to be an Equal Opportunity/Affirmative Action-Employer. We are committed to ensuring a workplace free of discrimination based on race, color, religion, age, disability, genetic information, sex, sexual orientation, gender identity, or national origin, military or veteran status, and any other basis protected by applicable law. For more information on Equal Employment please visit: http://www.cubic.com/Careers/Applicant-Help To learn more, visit Cubic.com. Follow us on LinkedIn!

Principle Software Engineer (Java).

more at Cubic.

Electronic Technician

Electronic Technician

Senior Software Engineer (Java)

similar roles.

Maintenance Engineer

Mobile Phlebotomy Supervisor

Adjunct Instructor, Engineering

Adjunct Instructor, Engineering

Mobile Mental Health Clinicians

Solutions Architect