Senior Java Software Engineer

Atain; Sydney; On-site; AUD 140,000 - 180,000; Full time

Job summary

Atain is seeking a Sr. Java Developer to design, develop, test, and maintain scalable enterprise applications using Core Java, Spring Boot, and microservices. You will build RESTful APIs, integrate with Oracle and MongoDB, and collaborate with DevOps on CI/CD and cloud-native deployments.

You’ll participate in all SDLC phases, engage with architects and business stakeholders, and drive code quality with reviews and best practices. Strong communication and Agile experience are essential.

Qualifications

• Bachelor's degree in CS, Engineering, or related field.
• 5–7 years of hands-on software development experience, primarily with Java and Spring Boot.
• Strong experience in developing enterprise applications and microservices.
• Good understanding of REST APIs, databases, messaging, and CI/CD practices.
• Experience working in Agile/Scrum development environments.
• Strong analytical, problem-solving, and communication skills.
• Ability to work effectively with architects, technical leads, developers, QA, DevOps, and business stakeholders.

Responsibilities

• Design, develop, and maintain enterprise applications using Core Java and Spring Boot.
• Develop scalable and maintainable microservices-based applications.
• Build RESTful APIs and enterprise applications.
• Participate in technical design and solution discussions with architects and leads.
• Translate functional and technical requirements into software solutions.
• Write clean, efficient, reusable, and well-tested code.
• Perform code reviews and follow established coding standards.
• Troubleshoot application issues and perform root-cause analysis.
• Optimize application performance, scalability, and reliability.
• Work with databases including Oracle and MongoDB.
• Develop and support integrations using IBM MQ and other messaging technologies.
• Collaborate with DevOps on CI/CD pipelines, deployments, and releases.
• Work with Docker and Kubernetes for containerized deployment.
• Participate in SDLC phases and production support.
• Contribute to continuous improvement of development processes.

Skills

Core Java

Spring Boot

Microservices

REST APIs

Angular

Object-Oriented Programming

Design Patterns

CI/CD practices

Production support and troubleshooting

Education

Bachelor's degree in Computer Science, Engineering, or a related field

Tools

Jenkins

Ansible

Git

Docker

Kubernetes

IBM MQ

Oracle Database

MongoDB

Job description

We are seeking an experienced Sr. Java Developer with strong hands‑on expertise in Java, Spring Boot, microservices, REST APIs, database technologies, and cloud‑native development. The ideal candidate will be responsible for designing, developing, testing, and maintaining scalable and high‑performance enterprise applications.

The candidate will work closely with architects, technical leads, business stakeholders, DevOps, and development teams to deliver secure, scalable, and maintainable solutions throughout the software development lifecycle.

Key Responsibilities

• Design, develop, and maintain enterprise applications using Core Java and Spring Boot.
• Develop scalable and maintainable microservices‑based applications.
• Build and integrate RESTful APIs and enterprise applications.
• Participate in technical design and solution discussions with architects and technical leads.
• Translate functional and technical requirements into effective software solutions.
• Write clean, efficient, reusable, and well‑tested code.
• Perform code reviews and follow established coding and design standards.
• Troubleshoot application issues and perform root‑cause analysis.
• Optimize application performance, scalability, and reliability.
• Work with databases including Oracle and MongoDB.
• Develop and support integrations using IBM MQ and other messaging technologies.
• Collaborate with DevOps teams on CI/CD pipelines, deployments, and release activities.
• Work with Docker and Kubernetes for containerized application deployment.
• Participate in all phases of the SDLC, including requirements analysis, design, development, testing, deployment, and production support.
• Contribute to continuous improvement of development processes, application quality, and engineering practices.

Primary Technical Skills

Application Development

• Spring Boot
• Microservices
• RESTful Web Services / REST APIs
• Angular
• Object‑Oriented Programming and Design Patterns

Database Technologies

• Oracle Database
• MongoDB
• SQL

Integration & Messaging

• IBM MQ
• REST‑based integrations

DevOps & Automation

• Jenkins
• Ansible
• Git

Containerization & Cloud‑Native Technologies

• Docker

Secondary Skills

• API design and development
• Application performance tuning
• CI/CD practices
• Production support and troubleshooting
• Basic understanding of application security and scalability

Qualifications

• Bachelor's degree in Computer Science, Engineering, or a related field.
• 5–7 years of hands‑on software development experience, primarily with Java and Spring Boot.
• Strong experience in developing enterprise applications and microservices.
• Good understanding of REST APIs, databases, messaging, and CI/CD practices.
• Experience working in Agile/Scrum development environments.
• Strong analytical, problem‑solving, and communication skills.
• Ability to work effectively with architects, technical leads, developers, QA, DevOps, and business stakeholders.