Senior Mobile Engineer - iOS or Android Contractor

westpacnz; Auckland; On-site; NZD 90,000 - 150,000; Full time

Job summary

Westpac New Zealand is transforming its mobile experience and seeks an experienced engineer to drive end‑to‑end delivery of production mobile solutions. You will shape technical approaches, implement, test, and support releases while championing code quality, security and reducing technical debt.

You will design, develop, test, and maintain mobile applications, collaborate with cross-functional teams, and provide mentorship to peers.

Qualifications

• Minimum 5 years of professional mobile app development experience (iOS or Android).
• Experience with DevOps, CI/CD, containers, and deployment automation.

Responsibilities

• Design, develop, test, and maintain mobile applications and integration solutions.
• Troubleshoot and resolve technical issues promptly, including after-hours support when required.
• Ensure best practices in design, coding standards, performance and security.

Skills

Mobile app development (iOS/Android)

DevOps & CI/CD

Containerisation

Unit testing & code reviews

Debugging

Software architecture & design

Responsible AI practices

Tools

CI/CD tools

Container platforms

Job description

About us

At Westpac New Zealand, our purpose is to Help New Zealanders Succeed. As a Bank and one of New Zealand's leading employers, we are passionate about helping people. We are taking action today to create a better future for the people who bank with us, work with us, invest in us or are part of our broader communities.

Mō te tūranga | About the Role

Westpac is transforming its mobile experience for customers. This role is responsible for end‑to‑end delivery of production mobile solutions - from shaping technical approach and implementation through to testing, release and operational support - while championing code quality, security and sustainable reduction of technical debt.

• Design, develop, test, and maintain applications and integration solutions.
• Troubleshoot and resolve technical issues promptly, ensuring system stability and participating in after‑hours support when required.
• Ensure best practice in design, coding standards, performance and security.
• Collaborate with project teams from concept through delivery to ensure solutions meet business and technical requirements.
• Provide technical guidance and mentorship to junior developers and peers.
• Create and maintain documentation throughout the Software Development Lifecycle (SDLC) to support transparency and knowledge sharing.
• Implement changes aligned with design specifications and evolving business needs.
• Analyse recurring issues and lead continuous improvement initiatives to enhance system performance and reliability.
• Maintain and refine support procedures to ensure resilience and minimize downtime.
• Contribute to release and deployment processes, ensuring accurate documentation and compliance with governance standards.
• Implement automated testing and ensure high-quality code through code reviews and continuous integration practices.

Nā tāu rourou | What will you bring?

• At least 5+ years of professional engineering experience in iOS or Android mobile app development.
• Experience in DevOps such as CI/CD pipelines, containerisation and deployment automation.
• Proficient in unit testing, code reviews, and debugging.
• Ability to break down complex problems and deliver practical solutions.
• Strong understanding of software architecture and design principles.
• Integrates AI effectively into engineering workflows to improve quality and efficiency, demonstrates strong judgement on appropriate use, and coaches others on responsible AI practices.