Senior Software Engineer - Backend Contractor

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 Join Westpac NZ as a Senior Backend Developer in our Product Engineering – Cards and Consumer Finance team. You’ll play a key role in designing, developing, and maintaining scalable applications using backend technologies. You’ll replace a critical legacy system with modern tech stack starting from scratch. Ko tō mahi | What you’ll do • 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. Nā tāu rourou | What will you bring? • At least 10+ years’ experience across API and Backend development • Proficiency with server-side development (Java, Spring Boot, Kafka, IBM MQ). • Experience in DevOps such as CI/CD pipelines, containerisation, and deployment automation. • Experience using AI for design and development. • Strong knowledge of database schema design, transactions, and queries. • Exceptional influencing and communication skills, with the ability to guide individuals toward fast and effective outcomes. • Strong problem-solving skills using systems thinking and analytical approaches.