Senior Backend Engineer - Payments & Digital Wallet APIs

Aptimized, LLC; Phoenix (AZ); Vor Ort; USD 140.000 - 190.000; Vollzeit

Zusammenfassung

Aptimized, LLC in Phoenix, AZ is seeking a Senior Backend Engineer to join a fast-paced Payments team focused on digital wallet platforms and API integrations with major providers like Apple Pay, Google Pay, and Samsung Wallet. You will contribute to scalable, secure, cloud-native backend services supporting wallet orchestration, tokenization, banking integrations, and payment processing.

The role requires hands-on experience with Java and Kotlin, microservices, Kafka, and REST APIs, plus

Qualifikationen

• Strong experience with Java (Java 8+ required, Java 21 preferred).
• Experience with Kotlin in enterprise backend applications.
• Hands-on experience building microservices architectures.
• Experience with Vert.x (preferred) or similar reactive frameworks.
• Strong understanding of Spring Boot.
• Experience with Kafka and asynchronous processing patterns.
• Experience with NoSQL databases, preferably Couchbase.
• Strong understanding of REST APIs and API security.
• Knowledge of encryption, token signing, symmetric and asymmetric cryptography.
• Experience working in cloud-native and containerized environments.
• Familiarity with OpenShift or similar orchestration platforms.

Aufgaben

• 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.

Tools

Java

Kotlin

Microservices

Vert.x

Spring Boot

Kafka

NoSQL (Couchbase)

REST APIs

Encryption/ Cryptography

Cloud-native / OpenShift

Jobbeschreibung

Aptimized, LLC in Phoenix, AZ is seeking a Senior Backend Engineer to join a fast-paced Payments team focused on digital wallet platforms and API integrations with major providers like Apple Pay, Google Pay, and Samsung Wallet. You will contribute to scalable, secure, cloud-native backend services supporting wallet orchestration, tokenization, banking integrations, and payment processing.

The role requires hands-on experience with Java and Kotlin, microservices, Kafka, and REST APIs, plus