Senior Java Backend Engineer: Spring Boot & Microservices

re-zoo-me; Phoenix, Northern (AZ, KY); Hybrid; USD 110,000 - 150,000; Full time

Job summary

re-zoo-me is seeking a skilled Java Backend Developer to design, develop, and maintain scalable backend applications and enterprise services powering digital platforms. You will work with Java, Spring Boot, REST APIs, and microservices in a collaborative Agile environment.

The ideal candidate has 5–7 years of Java backend experience, strong fundamentals, and a passion for secure, high-performance systems. This role offers a challenging, hands-on environment with modern tooling and continuous

Qualifications

• 5–7 years of Java backend development experience.
• Strong Java fundamentals: OO, collections, exceptions, multithreading.
• Hands-on Spring Boot, Spring MVC, Spring Data JPA, and Spring Security.
• Experience building RESTful APIs and microservices.
• Solid understanding of backend architecture and design principles.
• Experience with relational databases (PostgreSQL/MySQL/Oracle).
• Familiarity with NoSQL (MongoDB/Redis) and messaging (Kafka/RabbitMQ).
• Proficient with Git, Maven/Gradle, and CI/CD practices.

Responsibilities

• Design, develop, test, and maintain backend applications with Java and Spring Boot.
• Build and support RESTful APIs, microservices, and backend integrations.
• Collaborate with product owners, architects, QA engineers, and teams.
• Participate in code reviews, troubleshooting, and performance optimization.
• Develop and optimize database interactions and data models.
• Contribute to CI/CD pipelines and automated testing processes.
• Follow secure development principles and coding standards.
• Support production applications and assist with issue resolution.

Skills

Java

Multithreading

Async programming

SQL databases

NoSQL

Kafka/RabbitMQ

Git

CI/CD

Tools

Spring Boot

Spring MVC

Spring Data JPA

Spring Security

RESTful APIs

Maven/Gradle

CI/CD

Job description

re-zoo-me is seeking a skilled Java Backend Developer to design, develop, and maintain scalable backend applications and enterprise services powering digital platforms. You will work with Java, Spring Boot, REST APIs, and microservices in a collaborative Agile environment.

The ideal candidate has 5–7 years of Java backend experience, strong fundamentals, and a passion for secure, high-performance systems. This role offers a challenging, hands-on environment with modern tooling and continuous