Senior Software Engineer | Payments

Mō te tūranga | About the Role

As a Senior Software Engineer within the Payments Engineering team, you will play a pivotal role in designing, developing, and maintaining resilient, scalable, and secure platforms that support international payments and high‑value transactions.

This includes ownership of international payment flows across customer‑facing channels, ensuring reliable, intuitive, and compliant payment experiences for customers from initiation through to settlement.

In this role, you will establish engineering standards and contribute to critical architectural decisions that address complex technical challenges across the organisation. Your leadership will enable seamless integration of Payments systems across Westpac, while ensuring holistic ownership of the end‑to‑end customer payments experience and influencing the strategic direction of the Payments domain.

Senior Engineers at Westpac not only deliver high‑quality technical solutions but also contribute to the growth and capability of the wider engineering community. Through effective collaboration, mentorship, and a proactive, hands‑on approach, you will champion engineering excellence and drive innovation within the payments domain.

Ko tā mātou e mahi nei ināianei | What we are currently working on

• Building solid domain boundaries around payments through api-first engineering

• Uplifting payments to the latest industry standards.

• Leveraging and uplifting key technologies through the introduction of Cloud and Event streaming.

Ngā Haepapa Matua | Key Responsibilities

• Lead the design and implementation of solutions for international and high-value payment systems.

• Drive delivery of engineering initiatives, ensuring quality through automated testing, safe deployment practices, performance monitoring, and readiness assessments.

• Drive assessable devops practices and tooling which enabled all engineers to adopt “you build it, you run it”.

• Collaborate within cross-functional teams to story map epics, estimate work, and manage risk to meet sprint goals, including close collaboration with digital channel, product, and design partners on customer‑initiated international payment journeys.

• Ensure observability and operational excellence using Dynatrace and Splunk.

• Promote best practices in engineering, including container orchestration, messaging integration, and secure API connectivity.

• Mentor and support team members, fostering a culture of continuous learning and collaboration.

• Stay current with industry trends and apply relevant innovations to improve engineering capabilities.

Nā tāu rourou | What will you bring?

• At least 8 years of commercial experience with engineering with a strong focus on Java or similar languages such as C#.

• Proficiency in modern engineering practices such as contract first design, feature flagging and TDD.

• Proven experience in engineering platforms within complex, high-throughput domains —ideally in payments or financial services.

• Demonstrated full stack experience and mindset

• Strong background in modern devops practices and tools, e.g. K8, AWS, and Azure.

• Expertise in observability and monitoring using Dynatrace and Splunk.

• Demonstrated ability to lead delivery, solve complex problems, and influence across teams.

• Excellent communication skills with the ability to explain technical concepts clearly and empathetically.

• A collaborative mindset with a passion for mentoring and enabling others.

Westpac Hei Wāhi Mahi | Working at Westpac

In addition to immersing yourself in a supportive team environment, you'll receive some great job perks and benefits including:

• 4 weeks standard holiday + 5 additional days of wellbeing leave to support you to be your best

• Additional purchased leave options up to 4 weeks per year

• Banking benefits, insurance discounts and superannuation scheme

• Growth and development – we provide opportunities for development and promote internal mobility

• Recognition - we recognise and reward our star performers

• School holiday subsidy - help you balance work and family during school holiday

• 2 Volunteer days per year

Ko mātou tēnei | Our Organisation
At Westpac, we’re working together to build a fairer and stronger New Zealand for our people, customers, and communities. For over 160 years we’ve been driven by our purpose to Create Better Futures Together.

What makes us unique are the incredible people we’re lucky enough to have walk through our doors every day. The giant ‘W’ on our building doesn’t just stand for Westpac – it says, double you. We’re a place that values, rewards and recognises individuality. Where you can be your whole self, your true self, and your best self. We’re recognised as a place where talent is developed, where passions are fuelled and where ambitions of all shapes and sizes thrive. And it all starts with you!

Tono mai ināianei! | Apply Now!

Apply today with your CV and Cover Letter. 

The people of Aotearoa, New Zealand hail from many cultures and backgrounds. At Westpac New Zealand, we draw on this enormous talent pool to cultivate a team rich in ability and empowered to reach its full potential. Our aim is to be brave challengers, celebrating our differences and relentlessly advocating for our customers. It starts with us – we believe that when we care deeply and do our best for our people, they’ll do their best for our customers. We encourage people from all walks of life to apply, including those who are neurodiverse, have chronic health conditions or disabilities – your attitude and passion are as important to us as your experience, qualifications and capabilities. 

Mahi tahi tātou, kaha ake tātou | Together Greater

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