Senior Backend Engineer - Scalable, Data-Driven Bot Defense

About Kasada

Join us in stopping bad bots, for good! Kasada protects millions of online users everyday. Founded to stop automated bot attacks, we believe the internet should be a safe place for everyone. Bad bots are highly destructive. They take over accounts, steal content, overload systems and infrastructure and cause billions of dollars in damages every year. Seeking to restore trust in the internet, Kasada stops bots at the very first request including those that have never been seen before.

We’ve grown from a few friends working out of a shipping container under the Sydney Harbour Bridge to now operating globally, we’re spread across the world protecting some of the most well-known brands on the face of the earth.

We’re an innately curious team that’s not afraid to bring bold ideas to create better ways of solving problems. We’re looking for people who are passionate about solving some of the most difficult and pressing cybersecurity issues, while having fun doing it!

About the role

Kasada has an exciting opportunity to join our Account Intelligence team, the team responsible for defending our customers against fraud and malicious automation. Attackers use ever changing toolsets to launch highly costly attacks on our customers, and we handle an immense volume of traffic (think a billion requests per day) safeguarding renowned brands and protecting people online. Every millisecond counts!

As a Senior Software Engineer on the team, you will help shape our technical direction, architecting greenfield systems at the core of how we tell legitimate users apart from adversaries. You won't be confined to traditional three-tier applications. You will lead design discussions, work closely with our team lead on where the product goes next, and build the data-intensive systems that power our detection capabilities. This role involves close collaboration with engineering, research, and product teams across Kasada.

What you will be doing

• Shape the architecture: Lead the design of greenfield systems within Account Intelligence, from data modelling through to production, and help set the technical direction for the team.

• Design and implement features on our market-leading product, staying hands-on across the stack with a focus on backend and data-intensive systems.

• Lead design discussions: Drive architecture conversations within the team and across engineering, making your reasoning clear and bringing others along.

• Build low-latency, massively scalable solutions that cater for millions of requests per minute.

• Mentor and collaborate: Pair with teammates, lift the design capability of the team, and support other teams as they build on the systems we own.

• Design and implement features on our market-leading product

• Collaborate closely with other product and engineering teams

• Be involved in architecture design discussions in how we can build efficient solutions

• Build low-latency massively scalable solutions that cater for millions of requests per minute

What you will be working with

• NodeJS

• TypeScript

• A mix of databases such as Postgres, Redis, Clickhouse, etc

• AWS (Kubernetes, Lambda, S3, EC2 etc)

• GitHub

What you will bring

• At least 5 years of experience working on backend problems (Node/TypeScript experience a plus)

• Strong data modelling skills and experience with various data storage solutions (both SQL and NoSQL)

• Prior experience designing system architectures, and comfort designing a system from the ground up given product requirements

• A good understanding of AWS services and experience working with containers

• Exposure to highly scalable architectures and infrastructure as code

• Experience mentoring engineers or leading technical initiatives within a team

• A great ability to communicate highly technical concepts to non-technical audiences

The Benefits of Being a Kasadian

We’re committed to making Kasada a place where you can do the best work of your career — and feel supported while doing it. We foster an inclusive, highly collaborative environment grounded in our core values, and we’ve built our benefits to help you thrive both inside and outside of work.

• A stake in Kasada’s global success through equity/stock options

• Support for growing families, including generous parental leave and resources before, during, and after leave

• Wellbeing support to help you grow and recharge, including access to our EAP with confidential counselling for you and your loved ones

• Birthday leave

• Wellness leave

• Annual company offsites to connect, collaborate, and celebrate together

• A dog-friendly HQ in Sydney

What’s Next?

If this sounds interesting, hit the Apply button and one of our team will be in touch for an exploratory, confidential conversation. Our hiring process is designed to be thoughtful, efficient, and transparent — so everyone can make an informed decision about whether Kasada is the right next step.

When applying, you’re welcome to share the pronouns you use and any adjustments you may need during the interview process — we want you to feel set up for success in every conversation.

One Last Thing…

Research shows that women and individuals from underrepresented backgrounds are less likely to apply unless they meet every requirement. If this role excites you and you think you could add value, we’d love to hear from you — even if you don’t tick every box. We value diverse perspectives and welcome different paths and experiences.

Please note: Kasada is an E-Verify employer (US-based applicants only).