Senior Software Engineer

About Us:

Zepto is building the beating heart of Australia's real-time, account-to-account payments revolution.

It’s a good moment to be doing this work. Card surcharging rules have changed, Payday Super is live, and many businesses are taking a serious look at account-to-account payments for the first time. A lot of that shift lands on our platform, we're looking for action-oriented people to help build category defining infrastructure.

Payments is a domain where the details matter. When someone’s wages or a business’s cash flow moves through our platform, it has to arrive correctly, every time, in seconds. Meeting that bar in a regulated industry makes for interesting engineering problems, and as a senior engineer you’ll have real ownership over how we solve them.

We’re a remote-first team that works closely together. Engineers here are trusted to make decisions, encouraged to share their thinking, and supported to grow. That culture is part of why we’ve been named FinTech Organisation of the Year at the Finnies twice.

What you’ll do:

• Build, scale, and maintain high-volume, real-time payment APIs operating in a mission-critical, regulated environment.
• Work across cross-functional teams to design architecture, write RFCs, and ship clean, observable, secure software.
• Collaborate with Platform, Security, and Incident Management teams, participating in a shared on-call rotation.
• Mentor and pair with peers, raising the team's bar for code quality, system design, and engineering practices.

What you’ll bring:

• Strong backend foundations: Deep experience in a backend language and API development. We work in Ruby and Go, and we care more about your engineering than your current language.
• Cloud native architectures: Practical experience on public cloud (preferably AWS), event-driven patterns, Infrastructure as Code, and CI/CD pipelines.
• Scale & reliability mindset: Track record maintaining performance and high availability under heavy transaction loads.
• AI adoption: AI is changing how engineering works, and you're evolving with it. You use tools like Claude Code or Cursor as a core part of delivery, experiment as capabilities improve, while reviewing solutions with rigour and respecting data security boundaries.
• Clear, open communication: You collaborate early with drafts/RFCs and flag risks proactively.
• Front-end experience (React, TypeScript) is a bonus: Plenty of our work spans the stack, from the APIs that move money to the merchant-facing UIs built on them, so engineers who can follow their work through to the UI add real value.

Your First 6 Months:

Week 1: You’ll be paired with an onboarding buddy to get familiar with our domains, understand the business context across teams, and ship your first changes to production.

Month 1: You’ll begin to deliver features within your team's domains and review code with real context. You're building relationships across product, engineering and the wider business. You've probably spotted something that we could do better and either fixed it or made the case for prioritising an improvement.

Month 6: You’ve led a significant feature from idea to production: shaping the requirements with product, writing the RFC, breaking down the work and seeing it land with stakeholders. Alongside delivery, you've taken on an engineering project that makes the platform or the team better, whether that's observability, developer tooling, test infrastructure or paying down a piece of architecture we've outgrown. You own your team’s area of the product and know it better than anyone, including how it’s used and where it falls short. You challenge requirements when you can see a simpler way to solve the customer’s problem, and you’ve helped teammates level up through code review, pairing and design discussions. You’re helping set the standard for how your team uses AI tooling, shipping faster without cutting corners.

Why Zepto?

Headquartered in beautiful Byron Bay, Zepto has an inspiring founder story and is a customer-focused, culture-first organisation. You’ll be joining a team that champions curiosity and a pioneering perspective, and thrives in a fast-moving sector.

Just some of Zepto’s commitments to our people include:

• Join a Talented Team: Work with world-class talent and leaders who support career growth
• Flexible Work: A remote-first work culture, with the opportunity to work anywhere in Australia. You’ll also get access to premium co-working spaces and a Byron, Sydney & Melbourne Hub
• Paid Parental Leave: 12 weeks Paid Parental Leave for primary caregivers and 4 weeks for secondary caregivers
• Wellbeing Focus: Access to Zepto’s Wellbeing Menu, which includes 3 x paid Wellbeing Days per year and access to an Employee Assistance Program
• Annual Learning Budget: An individual learning budget, and 4 x paid Growth & Impact Days annually to focus on professional development
• Remote-Work Support: A $500 Remote Work Budget to set up your home office upon commencement, and $300 annually from your 2nd Zeptoversary

Please note: As an organisation in the financial services industry, we conduct background checks as part of our recruitment process.