Senior Backend Engineer, Payments & AI-Powered Systems

Westpac New Zealand; Auckland; On-site; NZD 120,000 - 170,000; Full time

Job summary

Westpac New Zealand is seeking a Senior Engineer to lead backend development for payments experiences. You will design, build, and evolve solutions across Java/Springboot, with a focus on scalable, secure, and customer-centric payment capabilities.

You'll mentor engineers, work with product and platform partners, and ensure delivery of resilient services within a cross-functional squad.

Qualifications

• Senior engineer with leadership in backend Java/Springboot.
• Experience mentoring engineers and guiding architectural decisions.
• Strong focus on scalable, resilient payments capabilities.
• Hands-on design, development, testing, and integration.

Responsibilities

• Design, develop, test, and maintain applications and integration solutions
• Troubleshoot and resolve technical issues promptly, with afterhours support when required
• Ensure best practices in design, coding standards, performance, and security
• Create and maintain documentation throughout the SDLC
• 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
• Ensure governance standards compliance

Skills

Backend Java/Spring Boot

DevOps CI/CD & containers

Unit testing & code reviews

Problem solving

Software architecture

Responsible AI practices

Job description

Westpac New Zealand is seeking a Senior Engineer to lead backend development for payments experiences. You will design, build, and evolve solutions across Java/Springboot, with a focus on scalable, secure, and customer-centric payment capabilities.

You'll mentor engineers, work with product and platform partners, and ensure delivery of resilient services within a cross-functional squad.