Senior Backend Engineer - Java/Spring Boot & API Leader

Westpac New Zealand Limited; Wellington; Hybrid; NZD 120,000 - 180,000; Full time

Benefits offered by this job

4 weeks holiday

Wellbeing leave

Banking benefits

Insurance discounts

Superannuation

Job summary

Westpac New Zealand Limited in Wellington is seeking a Senior Software Developer to design, develop, and maintain scalable backend applications.

You will lead technical design, mentor junior developers, implement CI/CD, ensure API best practices, and collaborate across teams to deliver high-quality software and resilient systems.

The role emphasizes hands-on coding, documentation, testing, and continuous improvement, with after-hours support as required.

Qualifications

• At least 7+ years’ experience across backend and API development.
• Proficiency with server-side development - Java, Spring Boot.
• Experience in designing and maintaining integrations with a wide variety of applications and APIs.
• Experience in DevOps such as CI/CD pipelines, containerisation and deployment automation.
• Strong knowledge of database schema design, transactions and queries.

Responsibilities

• Design, develop, test, and maintain scalable applications and integration solutions.
• Troubleshoot and resolve technical issues promptly, ensuring system stability.
• Ensure best practice in API design, coding standards, performance and security.
• Collaborate with project teams from concept through delivery to meet requirements.
• Provide technical guidance and mentorship to junior developers and peers.
• Create and maintain documentation throughout the SDLC.
• Lead continuous improvement initiatives to enhance performance and reliability.

Skills

Backend development & API design

Java

Spring Boot

DevOps

CI/CD

Containerisation

Deployment automation

Database design

Technical mentorship

Communication

Tools

CI/CD pipelines

Docker

Kubernetes

Job description

Westpac New Zealand Limited in Wellington is seeking a Senior Software Developer to design, develop, and maintain scalable backend applications.

You will lead technical design, mentor junior developers, implement CI/CD, ensure API best practices, and collaborate across teams to deliver high-quality software and resilient systems.

The role emphasizes hands-on coding, documentation, testing, and continuous improvement, with after-hours support as required.