Senior API Developer

Worker Type:

Here at BNZ, it's about more than just banking. We work together in an agile, energising environment to create innovative solutions though our promise "If you can imagine a better future, let's find a way."

We support wellbeing, flexible working and have a generous leave offering. No two days are the same.

We have an exciting opportunity for several experienced Senior API Developers to join our Core Ledger Replacement domain and help modernise lending technology that supports innovative customer experiences, creating a lasting impact for New Zealanders.

Based in either Auckland or Wellington, these fixed-term roles run through to October 2028, giving you the scope to make a meaningful contribution across a significant, multi-year transformation.

Mō te Tūranga | About the Role

We sat down with the Platform Manager and they told us the following about the role:

What are some of the day-to-day tasks the person in this role will complete?

• Lead the delivery of complex features, systems, or technical initiatives, balancing speed, quality, and alignment with strategic goals.
• Participate in the on-call roster and provide production support within your domain, helping maintain reliability and respond to incidents effectively.
• Apply advanced engineering knowledge to design and build robust, scalable systems, making technical decisions that account for long-term sustainability and operational impact
• Navigate ambiguity, shape problem definitions, and propose practical, effective solutions.
• Build strong relationships and influence technical direction using clear communication, structured thinking, and constructive challenge.
• Provide technical mentorship and support the growth of others through coaching, feedback, and knowledge sharing.

What is the most exciting thing about this opportunity?

Few opportunities give you the chance to help rebuild the engine room of a bank. Through Core Ledger Replacement, we’re modernising the lending technology at the heart of BNZ-moving from legacy systems to a modern, cloud-based core banking platform. The scale is significant, with the impact set to be felt across the entire organisation and through the experiences we deliver for our customers. If you’re excited by large-scale platform modernisation, enterprise integration, and building technology that will shape the future of lending at BNZ, we’d love to hear from you.

What is the team culture and environment like?

Our team operates in a collaborative and supportive environment where knowledge sharing, technical excellence, and continuous improvement are highly valued. Team members work closely together to solve complex problems, contribute ideas, and support each other's professional growth. Together we have a strong focus on quality, innovation, and delivering excellent outcomes.

What technical skills are required for this role?

We’re looking for strong software engineering experience, with deep expertise in one or more of the following technologies: Java, Spring Boot, REST APIs, Kafka, microservices, Kubernetes, and AWS.

You’ll have a proven track record of leading complex technical delivery across systems and teams, taking ownership of large-scale features or platforms from design and development through to deployment, production support, and continuous improvement.

What attributes will this person display in order to be successful in this role?

You’ll be a strategic problem solver who can make sound trade-offs in ambiguous environments, balancing technical decisions with business outcomes. Just as importantly, you’ll be a clear communicator and collaborative leader who builds trust across teams, supports an inclusive engineering culture, and helps grow others through coaching, mentoring, pairing, and knowledge sharing.

Nau Mai ki te Pēke o Aotearoa | Come to the Bank of New Zealand

Please note: Applications close Monday 2 November 2026.

This is an exciting opportunity to join us! We're bold thinkers who are taking brave steps to create a company that people want to work for, and customers want to bank with. If you're ready to join a fun organisation where we are proud of our culture and how we are helping New Zealander's to 'Find their way', then show your interest by submitting your application - we can't wait to read it.

Ehara taku toa i te toa takitahi, engari he toa takitini" - Success is not the work of an individual, but the work of many.”

Applications will be reviewed regularly across the advertising period, but we do reserve the right to close applications early.