Senior Developer - Core Ledger Replacement

Bank of New Zealand; Auckland; On-site; NZD 130,000 - 190,000; Part time

Benefits offered by this job

Wellbeing program

Flexible working

Generous leave

Job summary

Bank of New Zealand (BNZ) in Auckland is seeking experienced Senior API Developers to join the Core Ledger Replacement program. You will lead the delivery of complex features and scalable technical solutions within an agile environment, balancing speed, quality, and strategic alignment.

As a senior member, you will provide technical mentorship, influence direction, and own large-scale platforms from design through deployment.

Qualifications

• Proven experience delivering complex features and platforms.
• Strong engineering knowledge and architectural judgment.
• Experience leading cross-functional teams and mentoring others.

Responsibilities

• Deliver Outcomes: Lead the delivery of complex features, systems, or technical initiatives, balancing speed, quality, and alignment with strategic goals.
• Take responsibility for on-call participation and production support within your domain.
• Demonstrate Technical Excellence: design and build robust, scalable systems with long-term sustainability.
• Collaborate and Influence: build relationships across disciplines and influence technical direction.
• Grow Self and Others: provide technical mentorship and coaching, feedback, and knowledge sharing.

Skills

Java

Spring Boot

REST APIs

Technical leadership

System design

Job description

Worker Type:

Maximum Term/Fixed Term (Fixed Term)

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 experienced SeniorAPI Developers to join our Core Ledger Replacement domain and be part of a once-in-a-generation transformation programme. Help build the future of lending at BNZ, delivering modern technology, innovative customer experiences, and lasting impact forNew Zealanders.

As asenior member of the team,youwilldrive the delivery of complex, scalable, and maintainable technicalsolutions.This is a fixed-term opportunity throughtoSeptember 2028.

MōteTūranga| About the Role

We sat down with the People Leader (who you would reportto),andthey told us the following about the role:

What aresome of theday-to-day tasks the person in this role will complete?

• Deliver Outcomes: Lead the delivery of complex features, systems, or technical initiatives,balancing speed, quality, and alignment with strategic goals. Take responsibility for on-callparticipation and production support within your domain, helpingmaintainreliability andrespond to incidents effectively.

• Demonstrate Technical Excellence: Apply advanced engineering knowledge to design andbuild robust, scalable systems. Make technical decisions that account for long-termsustainability and operational impact.

• Solve Problems: Navigate ambiguity, shape problem definitions, and propose practical,effective solutions. Guide others through problem solving and system design.

• Collaborate and Influence: Build strong relationships across disciplines. Influence technicaldirection through clear communication, structured thinking, and constructive challenge.

• Grow Self and Others: Provide technical mentorship and support the growth of othersthrough coaching, feedback, and knowledge sharing. Proactively seek feedback to improveyour own effectiveness.

What is the team culture and environment like?

This teamoperatesin 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. There is a strong focus on quality, innovation, and delivering outcomes in line with established engineering standards.

What is the most exciting thing about this opportunity?

Few opportunities give you the chance to help rebuild the engine room of a bank. Core Ledger Replacement is transforming the technology that sits at the centre of BNZ, moving us from legacy systems to a modern cloud-based core banking platform. The scale is significant and the impact will be felt across the entire organisation. Ifyou’reexcited by large-scale platform modernisation, enterprise integration, and delivering technology that will shape BNZ’s future,we’dlove to hear from you.

What technical skills arerequiredfor this role?

We’relooking forstrongengineering experience, with deepexpertiseinone or moreof thesetechnical domains(Java,Springboot,RestAPI’s).You’llbring a strongtrack recordof leading complex technical work across systems or teams, taking ownership of large-scale features or platforms from design through to deployment, support, and continuous improvement.

What attributes will this person displayin order tobe successful in this role?

You’llbe a strategic problem solver who can make sound trade-offs in ambiguous environments, balancing technical decisions with business outcomes. Just as importantly,you’llbe 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 kitePēkeo Aotearoa | Come to the Bank of New Zealand

PLEASE NOTE:

Advertising for this position closeWednesday 9 September 2026.

Closing Date: 09 September 2026

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