Mō te tūranga | About the Role
Our Decision Management Platform squad supports and evolves some of Westpac’s most critical systems across a hybrid environment including mainframe, integration, middleware and SaaS platforms. As a Systems Engineer, you’ll help keep these environments stable, secure and performing at their best.
In this role, you’ll work across test engineering, integration support and application/platform support, while also contributing to ongoing improvements that make our systems simpler, faster and more resilient. You’ll play a key part in ensuring our decisioning and data services run smoothly, supporting the bank in lending, operations and risk management.
This role is ideal for someone who’s inquisitive, detail‑oriented and enjoys working across complex, interconnected systems. If you like solving problems, improving processes and building reliable services, you’ll thrive here.
Ko tō mahi | What you’ll do
Support FICO SaaS decision management platform deployments and associated change tasks.
Support and enhance IBM DataPower JavaScript processing and manage deployments using CloudBees CI/CD pipelines.
Develop and maintain PowerShell utilities and scripts for MFT and platform support.
Design, develop, maintain and execute test solutions across hybrid environments including MVS, COBOL, USS/zLinux and Java processes.
Identify and analyse issues, determine root causes and develop automation or utilities to streamline processes.
Maintain and create automation in line with WNZL standards and templates.
Create and reuse unit tests, test stubs and drivers to support efficient quality practices.
Participate in integration activities to ensure the smooth flow of data and services across systems.
Provide L2/L3 application support to ensure platform stability, reliability and timely incident resolution.
Apply quality engineering practices, ensuring early defect detection and adherence to standards.
Contribute to knowledge sharing and continuous improvement within engineering teams.
Participate in 24/7 platform support through PagerDuty as required.
Nā tāu rourou | What will you bring?
At least 5 plus years’ experience in a similar engineering role.
Strong test engineering experience across functional testing, test design and an automation first mindset.
Hands on experience with mainframe MVS, COBOL, USS zLinux and Java processes.
Experience working within multi system integration environments.
Strong problem solving skills with the ability to simplify complex systems.
Understanding of Agile ways of working.
Clear and confident communication skills with strong cross team collaboration capability.
Understanding of CI CD pipelines, particularly CloudBees.
Familiarity with DataPower and JavaScript based processing.
Scripting experience, ideally using PowerShell.
MFT experience is advantageous and training can be provided.
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
Applications close:
28 February 2026Top Skills
What We Do
Westpac is Australia’s oldest bank and company, one of four major banking organisations in Australia and one of the largest banks in New Zealand. We provide a broad range of banking and financial services in these markets, including consumer, business and institutional banking and wealth management services. We also have offices in key financial centres around the world including London, New York, Hong Kong and Singapore.
Westpac Group's portfolio of financial services brands and businesses is focused on our vision, which is "To be one of the world’s great service companies, helping our customers, communities and people to prosper and grow.”
