Senior Software Engineer (Node.js/Typescript + AWS) - Core Banking Services

At Zeller, we’re champions for businesses of all sizes, and proud to be a fast-growing Australian scale-up reimagining business banking and payments.

We believe in a level playing field, where all businesses benefit from access to smarter payments and financial services solutions that accelerate their cash flow, help them get paid faster, and give them a better understanding of their finances. So we’re hard at work building the tools to make it happen.

Zeller is growing fast, backed by leading VCs, and brings together a global team of passionate payment and tech industry professionals. With an exciting roadmap of innovative new products under development, we are building a supportive and high performing team to inspire change in the outdated banking solutions. If you are passionate about innovation, thrive in dynamic environments, embrace new possibilities, hate bureaucracy, and can’t think of anything more exciting than evolving the status-quo, then read on to learn more.

The Role
We’re seeking an exceptional Senior Software Engineer with deep expertise in event-driven architectures and cloud-native development. This key position offers a defined pathway to technical leadership for candidates who demonstrate architectural vision and team leadership capabilities. The ideal candidate will drive technical excellence while mentoring team members and influencing our engineering practices.
Key Responsibilities
Architect, design, and implement enterprise-grade, scalable software solutions using TypeScript and modern architecture patterns
Spearhead implementation of complex event-driven systems following Event-Sourcing and CQRS patterns
Lead development of cloud-native applications on AWS following clean architecture principles
Drive technical decision-making and solution design within cross-functional teams
Establish engineering best practices, coding standards, and architectural guidelines
Provide technical mentorship to junior and mid-level engineers
Conduct thorough code reviews and ensure quality through rigorous testing methodologies
Participate in technical leadership discussions and contribute to strategic technology roadmaps
Implement and maintain DevOps practices and infrastructure as code deployments
Qualifications
Bachelor’s degree in Computer Science, Engineering, or related field (Master’s degree preferred)
5+ years of professional software development experience in enterprise environments
Demonstrated mastery of TypeScript and JavaScript with advanced knowledge of object-oriented programming principles (Java or C# expertise is valued)
Proven track record implementing Event-Sourcing and CQRS architectural patterns in production environments
Extensive experience with event streaming technologies such as AWS Event-Bridge or Kafka
Advanced proficiency in unit testing and integration testing using frameworks like JEST, with commitment to test-driven development
Expert understanding of clean architecture, SOLID principles, and enterprise design patterns
Comprehensive experience with AWS cloud platform, particularly DynamoDB, SQS, Event-Bridge, and DocumentDB
Demonstrated proficiency with DevOps practices including ECS, Fargate, AWS CI/CD pipelines, and Infrastructure as Code
Exceptional analytical thinking and problem-solving capabilities
Outstanding communication skills with ability to explain complex technical concepts to diverse audiences
Preferred Skills
Experience in banking and financial domain, particularly in core banking is preferred
Experience building high-throughput, fault-tolerant distributed systems
Advanced knowledge of serverless architecture patterns and AWS Lambda
Proficiency with containerization (Docker) and orchestration technologies
Experience with microservices architecture implementation, mono-repo structures, and domain-driven design
Strong background in performance optimization and scalability of event-driven systems
Experience with financial compliance requirements and security best practices
$120,000 - $150,000 a year
How we work
Our team thrives on the energy of being together. While technology connects us virtually, we love the in-person collaboration and spend majority of our work week at our spacious (and fully stocked with snacks) Melbourne CBD office. Read more