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Aptimized · Phoenix, Arizona
Senior Backend Engineer (Java / Kotlin)
Phoenix(Hybrid)
Rate: Open
Engagement: 6+ Months(C2C)
Overview
We are seeking a Senior Backend Engineer to join a fast-paced Payments team focused on digital wallet platforms and API integrations with major providers such as Apple Pay, Google Pay, and Samsung Wallet. The engineer will contribute to the development of highly scalable, secure, cloud-native backend services supporting wallet orchestration, tokenization, banking integrations, and payment processing.
Key
Design and develop backend microservices for payment and wallet ecosystems.
Build and maintain secure public-facing APIs and integration services.
Develop asynchronous and event-driven solutions using Kafka and related messaging technologies.
Implement integrations with digital wallet providers and financial institutions.
Contribute to tokenization, data security, encryption, and authentication solutions.
Work within a cloud-native environment deployed on OpenShift.
Collaborate with cross-functional teams to deliver highly available and scalable services.
Required
Strong understanding of Spring Boot.
Strong understanding of REST APIs and API security.
Knowledge of encryption, token signing, symmetric and asymmetric cryptography.
Familiarity with OpenShift or similar orchestration platforms.
Preferred
Knowledge of tokenization solutions and sensitive data protection.
Familiarity with virtual threads, CompletableFuture, and modern Java asynchronous patterns.
Experience integrating Apple Pay, Google Pay, Samsung Wallet, or similar payment platforms.
Details
| Company | Aptimized |
| Location | Phoenix, Arizona |
| Type | FULL TIME |
| Niche | Full-time |