Java Backend Engineer – Microservices, Cloud & APIs

Ethereum Technologies; Atlanta (GA); On-site; USD 110,000 - 170,000; Full time

Job summary

Ethereum Technologies seeks a skilled backend engineer to design and develop Java-based services using Spring Boot and Spring Cloud in a distributed ecosystem. You will build microservices, REST APIs, and event-driven components with Kafka/RabbitMQ, ensuring secure authentication and scalable data storage across Oracle, MongoDB, and Redis.

Responsibilities include implementing business rules with Drools, leveraging NetCracker, and maintaining automated tests with JUnit/Mockito within CI/CD and

Qualifications

• Backend applications built with Java 11/17+, Spring Boot, and Spring Cloud.
• Design and maintain microservices, REST APIs, distributed systems.
• Implement secure authentication and authorization using OAuth2, OIDC, JWT, and Microsoft Entra ID.
• Develop automated tests using JUnit 5, Mockito, Testcontainers, and contract testing.
• Deploy and manage applications using Docker, Kubernetes, and AWS services.
• Follow secure coding practices, CI/CD standards, and Agile methodologies.
• Utilize AI-assisted development tools such as Claude Code or Claude API where applicable.

Responsibilities

• Design and develop backend applications using Java 11/17+, Spring Boot, and Spring Cloud.
• Build and maintain microservices, REST APIs, and distributed systems.
• Work with the NetCracker Platform and implement business rules using Drools or equivalent rules engines.
• Develop event-driven applications using Kafka and RabbitMQ.
• Design, optimize, and maintain databases using Oracle SQL/PL/SQL, MongoDB, and Redis.
• Implement secure authentication and authorization using OAuth2, OIDC, JWT, and Microsoft Entra ID.
• Develop automated tests using JUnit 5, Mockito, Testcontainers, and contract testing.
• Deploy and manage applications using Docker, Kubernetes, and AWS services.
• Troubleshoot production issues and optimize application performance.
• Follow secure coding practices, CI/CD standards, and Agile methodologies.
• Utilize AI-assisted development tools such as Claude Code or Claude API where applicable.

Skills

Java

Spring Boot

Spring Cloud

Microservices

REST APIs

Distributed systems

Kafka

RabbitMQ

OAuth2/JWT

JUnit/Mockito

Testcontainers

Docker

Kubernetes

AWS

Security

Tools

NetCracker Platform

Drools

Testcontainers

Docker

Kubernetes

AWS services

Claude Code

Job description

Ethereum Technologies seeks a skilled backend engineer to design and develop Java-based services using Spring Boot and Spring Cloud in a distributed ecosystem. You will build microservices, REST APIs, and event-driven components with Kafka/RabbitMQ, ensuring secure authentication and scalable data storage across Oracle, MongoDB, and Redis.

Responsibilities include implementing business rules with Drools, leveraging NetCracker, and maintaining automated tests with JUnit/Mockito within CI/CD and