Senior Backend Engineer: Build Modern APIs, Flexible Hours

Westpac New Zealand Ltd; Auckland; Hybrid; NZD 140,000 - 190,000; Full time

Benefits offered by this job

Flexible working arrangements

Job summary

Westpac New Zealand Ltd is seeking a Senior Backend Developer to design, build, and maintain scalable backend services. You will work on a critical legacy transformation, replacing it with a modern stack starting from scratch.

Key focus areas include API/backend development, Java and Spring Boot, Kafka and IBM MQ, and DevOps with CI/CD, automation, and containerisation. Strong problem-solving and communication are essential.

Qualifications

• 10+ years of API and backend development experience.
• Proficiency with server-side Java, Spring Boot, Kafka and IBM MQ.
• Experience with CI/CD pipelines, containerisation and deployment automation.
• Experience using AI for design and development.
• Strong knowledge of database schema design, transactions and queries.
• Excellent influencing and communication skills; able to guide teammates.
• Strong problem-solving using systems thinking and analytical approaches.

Responsibilities

• Design, develop, test, and maintain backend applications and integrations.
• Troubleshoot issues and ensure system stability.
• Implement changes per design specs and evolving business needs.
• Lead continuous improvement initiatives for reliability and performance.
• Maintain support procedures to minimise downtime and ensure resilience.
• Contribute to release and deployment processes with proper documentation.
• Implement automated testing, code reviews, and CI practices.

Skills

Backend development

API development

Java

Spring Boot

CI/CD

Containerisation

AI for design

Kafka

Tools

Kafka

IBM MQ

Job description

Westpac New Zealand Ltd is seeking a Senior Backend Developer to design, build, and maintain scalable backend services. You will work on a critical legacy transformation, replacing it with a modern stack starting from scratch.

Key focus areas include API/backend development, Java and Spring Boot, Kafka and IBM MQ, and DevOps with CI/CD, automation, and containerisation. Strong problem-solving and communication are essential.