Senior Developer (Java & Python)

Westpac; Sydney; On-site; AUD 120,000 - 180,000; Full time

Job summary

Westpac is seeking a Senior Developer in Sydney to lead the design and delivery of scalable APIs and microservices. You will mentor peers, shape the technical direction, and improve build tooling and shared libraries for a broad developer community.

You'll work on flagship Mesh Connect Marketplace, collaborating across teams to deliver high-quality software, automate processes, and ensure reliable deployments while fostering a thriving development culture.

Qualifications

• 5–10 years of polyglot software development experience.
• Experience building APIs and microservices in Java; Node.js or Python desirable; JSON data formats required.
• Strong Git and GitHub workflows including PRs, branching strategies, code reviews and CI integrations.
• Solid understanding of the Software Development Life Cycle (SDLC) and emphasis on quality and automation.
• Experience with public cloud platforms, ideally Azure and/or AWS.
• Exposure to SaaS platforms such as Confluent Kafka, MongoDB, Harness.
• Advocacy for agile practices like TDD, pair programming and continuous delivery/deployment.

Skills

Polyglot programmer

APIs & microservices

Java

Node.js

Python

Git & GitHub

SDLC

Cloud: Azure/AWS

TDD

Pair Programming

CD/Deployment

Tools

Confluent Kafka

MongoDB

Harness

Job description

Job Description Create your best future and join Westpac as a Senior Developer.

Job Description Create your best future and join Westpac as a Senior Developer.

What’s the role? Our team of polyglot engineers builds delightful experiences for software engineers across Westpac. You will work on our flagship Mesh Connect Marketplace and the tools that enable developers to easily build, deploy, and run future‑ready applications. As a Senior Engineer, you will help shape the technical direction of the products and mentor junior developers within the team. This role focuses on delivering high‑quality software while continuously improving build processes, tooling, and shared libraries for a broad developer community. It also emphasises strong collaboration, clear communication, and the removal of impediments to foster a motivated team and a thriving technical community.

What do I need?

• A polyglot programmer with at least 5-10 years of experience.
• Strong experience in developing APIs and micorservices with Java, with experience of Node.js or Python desirable and experience with JSON and other data formats is mandatory.
• Strong version control practices using Git, including GitHub (pull requests, branching strategies, code reviews and CI integration).
• Strong understanding of the Software Development Life Cycle (SDLC), including requirements, design, build, test, release and operate, with a focus on quality and automation.
• A strong understanding and experience with public cloud, ideally Azure and/or AWS.
• Desirable to have exposure to SaaS based platforms such as Confluent Kafka, MongoDB, Harness etc.
• Passionate about agile practises such as Test-Driven Development (TDD), Pair-Programming and Continuous Delivery and Deployment.

Why join us? We’re obsessed with becoming our customers' #1 banking partner for life and we’re looking for people who are passionate about helping us achieve that goal. In return, we’re committed to making Westpac the best place to work in the country. Here are just a few of the ways we’re already doing that:

• Special offers on banking products and discounts from top brands, including generous employee-only mortgage rates!
• Flexible work arrangements to help you achieve a greater work/life balance, and a variety of leave options including Culture, Lifestyle and Wellbeing leave.
• Tailored learning and development opportunities to help your grow your career within the bank.
• Lots of opportunities to ‘give back’ to the Community by getting involved in our many volunteering initiatives.

Create your future today

We’re all about creating a supportive and inclusive community. We welcome everyone – no matter your age, gender, background, or abilities. We also provide additional support to welcome our veterans, Indigenous Australians and neurodiverse community.

If you need any adjustments during the recruitment process, you can find more information and contact details on our FAQs and how to contact us page , under the ‘Diversity, sustainability and flexibility’ section.

We may close this job advertisement earlier than the advertised closing date if suitable candidates are identified.