Java Backend Developer

Ethereum Technologies; Chicago (IL); On-site; USD 100,000 - 160,000; Full time

Job summary

Ethereum Technologies is seeking an experienced Java Backend Developer to design, build, and maintain scalable server-side applications. You will work with Java and Spring Boot to deliver robust RESTful APIs and a microservices-based architecture.

The role involves cloud deployment on AWS/Azure/GCP, containerization with Docker/Kubernetes, and collaboration with DevOps and QA teams. The ideal candidate will implement security with OAuth 2.0 and JWT, optimize performance, and contribute to

Qualifications

• Experience designing backend services using Java and Spring Boot.
• Strong RESTful API and microservices experience.
• Cloud deployment experience (AWS/Azure/GCP) and containerization.

Responsibilities

• Design, develop, and maintain backend applications using Java and Spring Boot.
• Build scalable and secure RESTful APIs for enterprise applications.
• Develop and maintain Microservices-based architecture.
• Implement business logic using Java and OOP concepts.
• Work with Spring Framework, Spring MVC, Spring Data JPA, and Hibernate.
• Design and optimize database schemas, queries, and stored procedures.
• Integrate backend services with third-party applications and external APIs.
• Implement authentication and authorization using Spring Security, OAuth 2.0, and JWT.
• Develop asynchronous processing using Kafka, RabbitMQ, or messaging systems.
• Improve application performance through caching and code optimization.
• Write unit and integration tests using JUnit and Mockito.
• Deploy and manage backend applications on AWS, Azure, or GCP.
• Work with Docker and Kubernetes for containerization and deployment.
• Participate in code reviews and maintain coding standards.
• Troubleshoot production issues and resolve application defects.
• Collaborate with cross-functional teams in Agile development environments.

Skills

Java

Spring Boot

Microservices

REST APIs

Database design

Cloud technologies

Spring Framework

Spring Data JPA

Hibernate

OAuth 2.0

JWT

Kafka

RabbitMQ

AWS

Azure

GCP

Docker

Kubernetes

JUnit

Mockito

Tools

Docker

Kubernetes

AWS

Azure

GCP

Kafka

RabbitMQ

Job description

US Citizen, Green Card, H-1B, OPT-EAD, CPT, Other

Work Authorization:US Citizen, Green Card, OPT-EAD, CPT, H-1B, H4-EAD, Other

Job Summary:

We are looking for an experienced Java Backend Developer responsible for designing, developing, and maintaining scalable backend applications and server-side components. The ideal candidate should have strong expertise in Java, Spring Boot, Microservices, REST APIs, database management, and cloud technologies. The candidate will work closely with frontend developers, architects, QA engineers, and DevOps teams to build high-performance enterprise applications.

• Design, develop, and maintain backend applications using Java and Spring Boot.
• Build scalable and secure RESTful APIs for enterprise applications.
• Develop and maintain Microservices-based architecture.
• Implement business logic using Java, J2EE, and object-oriented programming concepts.
• Work with Spring Framework, Spring MVC, Spring Data JPA, and Hibernate.
• Design and optimize database schemas, queries, and stored procedures.
• Integrate backend services with third-party applications and external APIs.
• Implement authentication and authorization using Spring Security, OAuth 2.0, and JWT.
• Develop asynchronous processing using Kafka, RabbitMQ, or messaging systems.
• Improve application performance through caching and code optimization.
• Write unit and integration tests using JUnit and Mockito.
• Deploy and manage backend applications on AWS, Azure, or GCP.
• Work with Docker and Kubernetes for containerization and deployment.
• Participate in code reviews and maintain coding standards.
• Troubleshoot production issues and resolve application defects.
• Collaborate with cross-functional teams in Agile development environments.

We are an equal opportunity employer. All aspects of employment including the decision to hire, promote, discipline, or discharge, will be based on merit, competence, performance, and business needs. We do not discriminate on the basis of race, color, religion, marital status, age, national origin, ancestry, physical or mental disability, medical condition, pregnancy, genetic information, gender, sexual orientation, gender identity or expression, national origin, citizenship/ immigration status, veteran status, or any other status protected under federal, state, or local law.