Senior Backend Engineer - Modernize Core APIs

westpacnz; New Zealand; On-site; NZD 120,000 - 180,000; Full time

Job summary

Westpac New Zealand is seeking a Senior Backend Developer to design, develop, and maintain scalable applications in the Product Engineering - Cards and Consumer Finance team. You will lead the replacement of a critical legacy system with a modern tech stack from scratch.

You will work with Java, Spring Boot, Kafka, and IBM MQ, driving DevOps, CI/CD pipelines, containerisation, and deployment automation. Strong problem-solving, communication, and systems thinking are essential to guide

Qualifications

• Design, develop, test, and maintain applications and integration solutions.
• Troubleshoot and resolve technical issues, ensuring system stability.
• Implement changes aligned with design specifications and evolving business needs.
• Analyse recurring issues and lead continuous improvement initiatives.
• Maintain and refine support procedures to ensure resilience and minimise downtime.
• Contribute to release and deployment processes, ensuring accurate documentation and compliance.
• Implement automated testing and ensure high-quality code through code reviews and continuous integration practices.

Responsibilities

• Design, develop, test, and maintain applications and integration solutions.
• Troubleshoot and resolve technical issues, ensuring system stability.
• Implement changes aligned with design specifications and evolving business needs.
• Analyse recurring issues and lead continuous improvement initiatives.
• Maintain and refine support procedures to ensure resilience and minimise downtime.
• Contribute to release and deployment processes, ensuring accurate documentation and compliance.
• Implement automated testing and ensure high-quality code through code reviews and continuous integration practices.

Skills

API & Backend

Java

Spring Boot

Kafka

IBM MQ

CI/CD

Containerisation

Deployment automation

AI for development

Database design

Stakeholder communication

Systems thinking

Job description

Westpac New Zealand is seeking a Senior Backend Developer to design, develop, and maintain scalable applications in the Product Engineering - Cards and Consumer Finance team. You will lead the replacement of a critical legacy system with a modern tech stack from scratch.

You will work with Java, Spring Boot, Kafka, and IBM MQ, driving DevOps, CI/CD pipelines, containerisation, and deployment automation. Strong problem-solving, communication, and systems thinking are essential to guide