Senior Security Engineer

About us

We’re Littlepay - a growing fintech headquartered in Melbourne with operations in the UK, EU, LATAM, USA, and more recently, Australia. Our payments platform enables our customers to pay for public transport using any payment card, mobile wallet, or wearable device. Processing over USD 1 billion a year in 19 countries and continuing to expand globally, we’re proud to move more people through better payment experiences.

About the opportunity

Reporting to the Head of Security, the Senior Security Engineer will be responsible for improving the safety and security of Littlepay’s products. You will be working with developers and other stakeholders to promote secure coding practices and raise awareness of security risks.

What you’ll do

• Collaborate with development teams to implement secure coding practices and integrate security controls throughout the software development lifecycle (SDLC).


• Work alongside software and Platform Engineering to identify and remediate Infrastructure-as-Code (IaC) misconfigurations, API security weaknesses, and cloud-native design flaws.


• Execute application security testing, including vulnerability scanning, threat modeling, and contributing to penetration testing engagements.


• Identify and mitigate security vulnerabilities in software applications. Ensure all findings and remediation steps are clearly documented.


• Support team planning by providing technical input on tasks and contributing to the security backlog.


• Collaborate with team members to share knowledge and contribute to a high-performing engineering culture.


• Monitor the security landscape for the latest threats and vulnerabilities, applying these insights to daily tasks and organisational defenses.

You are likely a match if you have

• 4 - 6 years of experience in application security with a solid understanding of security engineering principles and AWS.


• Understanding of software design and the ability to review code and provide constructive, actionable feedback to developers.


• Experience securing cloud-native environments, including containerised applications, CI/CD pipelines, and APIs.


• Foundational knowledge in Identity, Authentication, and Authorisation protocols (e.g., OAuth2, OIDC, SAML).


• Hands-on experience with security tooling, such as SAST, SCA, DAST, and general vulnerability scanning.


• Familiarity with Vulnerability Management and an understanding of securing the software supply chain.


• Knowledge of security frameworks and methodologies (e.g., OWASP Top 10, MITRE ATT&CK, Snyk).


• Proficiency in at least one language: Experience writing or scripting in Java, Python, or Go.


• Strong Communication: Ability to translate technical security concepts into clear written and verbal instructions for stakeholders.


• High Empathy: A service-oriented mindset when working with internal development and product teams.

Our benefits

We love to look after our people. At Littlepay, you'll be part of an inclusive and diverse team that celebrates the differences and unique gifts we each bring to work.

You’ll have access to:

• A high trust working environment, with usage of cloud collaboration tools like Notion, Slack, Miro, Gmail and Jira that help us work together effectively


• Paid professional development (including conferences, courses, learning subscriptions, etc.)


• Harrison Assessments - our talent management provider that facilitates continuous professional development


• A variety of flexible leave options


• Superannuation contributions on all paid parental leave payments


• A company-wide paid day off


• Our flexible public holiday program


• Flexible (hybrid) working conditions


• Wellbeing support- including a free School of Life subscription for all employees, and counselling via the School of Life (UK) or our EAP program (Australia)


• Our generous employee referral program


• Mid-year, quarterly, and end-of-year corporate and team events and workshops


• Short-term remote working arrangements

In-office expectations

At Littlepay, we believe great work happens when we solve problems, together. We see in-person collaboration as an important way to build connections, share ideas, and support each other meaningfully.

For this role, there is a requirement to be in the office a minimum of three days a week. This ensures you can engage effectively with the team, contribute to cross-functional collaboration, and participate in activities that benefit from in-person interaction.

We aim to strike a healthy balance between in-person connection and flexibility, while staying connected to deliver with quality and agility as we continue to scale, ensuring our ways of working support both our people and our shared ambition to move more people through better payment experiences.

Our recruitment process

If you’ve been shortlisted for the role, you’ll first have a chat with our Talent team, who will set up an interview if the stars align. A short workplace preferences questionnaire will also be sent to help us learn more about the way you prefer to work. Following a successful first interview, you’ll be sent a technical challenge to complete. If we like what we see, we’ll invite you to meet with a second set of Littlepay folks before being presented with an offer.

If you have any questions regarding the recruitment process or if you require any accommodations for any stage in the interview process, please don’t hesitate to let us know. Additionally, if you don’t meet all of the criteria (we know that some underrepresented groups tend to avoid applying if they don’t), please still apply. We really enjoy meeting people who might bring a fresh perspective on a problem we need to solve!

Ultimately, being part of our small but mighty team means you'll have the opportunity to learn about micropayments, and have a hand in the provision of services that impact millions of people. You’ll help us deliver on our revolutionary product roadmap and help scale our platform as we continue to expand across the globe.

If this opportunity interests you, hit apply! We look forward to learning about you.