Senior Software Engineer - DEA Team

At Squiz, we are building a cloud-based Digital Experience Platform (DXP) designed to power complex content management, optimization tooling, and platform services. Within this ecosystem, our Data Enrichment Agents (DEA) team is fundamentally redefining how enterprise customers interact with data and provide best-in-class personalization capabilities to digital experiences.

We are looking for a Senior Software Engineer to join our DEA team in the Personalisation space, owning core DXP services including Customer Data Platform (CDP), Datastore, user journey mapping, and A/B testing. This role requires a pragmatic, battle-tested systems thinker with a strong detective mindset for troubleshooting complex issues. While you will contribute to platform capabilities and software development, your primary responsibility is building resilient, secure, and cost-efficient cloud systems with a focus on financial prioritization, high bang-for-buck delivery, and preventing AI slop through rigorous code quality and peer mentoring. You will balance long-term technical debt with pragmatic agile workarounds, ensuring all temporary debt is properly tracked in the backlog.

The Team Dynamics

We believe senior engineers do their best work when given real technical autonomy, deep ownership over system architecture, and space to focus on the craft of software engineering. In this role, you will work in tight lockstep with an Engineering Manager, driving high-impact backend services and shaping our next-generation personalization capabilities. You'll be surrounded by collaborative, high-performing peers, solve complex distributed systems challenges at scale, and directly influence how enterprise customers interact with our platform, all within a high-trust, flexible environment that balances rapid product delivery with sound architectural rigor.

This is a permanent position open to anyone living on the east coast of Australia. We operate on a flexible, hybrid model, meaning you can balance working from home and collaborating with the team in a way that actually works for you.

What the Work Looks Like Day-to-Day

• Take end-to-end technical ownership of core DEA services including Customer Data Platform (CDP), Datastore, user journey mapping, and A/B testing, ensuring data pipelines are scalable, highly available, and structurally sound.
• Architect greenfield systems and features using MoSCoW prioritization, adopting a documentation-first approach to define clear specifications before writing production code.
• Design resilient cloud architectures on AWS with a strict focus on reducing data transfer costs, enforcing end-to-end encryption, and implementing sound security practices.
• Establish robust incident response operational standards, including creating clear playbooks, disaster recovery procedures, backup testing, and continuous system monitoring.
• Drive continuous cost analysis and FinOps practices across AWS (ECS/Fargate, Lambda, S3) and edge services (Cloudflare) to maximize financial bang-for-buck.
• Maintain and optimize CI/CD pipelines using GitLab CI/CD, driving automated security scanning, containerized deployments (Docker, ECS/Fargate), and infrastructure reproducibility via AWS CDK or CloudFormation.
• Deconstruct high-level business vision into actionable epics, clear user stories, and well-defined technical tasks within agile frameworks.
• Design clean, scalable APIs following industry best practices and manage transitions between relational (SQL/PostgreSQL) and schemaless data models.
• Stay hands-on across our tech stack by writing resilient services in TypeScript and Node.js, supporting legacy PHP applications, writing Bash scripts, and integrating AI services safely.
• Provide technical mentorship to junior and mid-level engineers, enforcing high coding standards to prevent AI slop and ensure long-term codebase maintainability.

What We Are Looking For

• 5+ years of hands-on experience building, scaling, and maintaining complex distributed systems in production with strong troubleshooting and detective skills.
• Deep proficiency with AWS cloud infrastructure, containerization (Docker, ECS/Fargate), serverless (Lambda, DynamoDB), and Infrastructure as Code (AWS CDK or CloudFormation).
• Extensive experience with database design across both relational (SQL, PostgreSQL) and schemaless/NoSQL data models, including cost and performance optimization.
• Solid background in GitLab CI/CD pipelines, DevSecOps, Cloudflare edge services, and security practices including data encryption at rest and in transit.
• Strong programming proficiency in TypeScript and Node.js, combined with practical exposure to PHP and Bash scripting.
• Demonstrated commitment to a documentation-first methodology, incident response readiness (playbooks, backups, testing), and clear API design standards.
• Pragmatic approach to agile development, capable of making smart trade-offs, tracking technical workarounds properly, and breaking down complex vision into detailed epics and stories.

Tools and Context That Will Help You Stand Out

If you have a strong background in customer data platforms (CDP), database or data storage solutions, personalization, segmentation, or A/B testing experiences, you'll have a massive head start here. While this is a heavily backend-focused infrastructure role, a passing literacy in React/JS/CSS helps keep frontend integrations smooth. Experience with modern cloud observability and monitoring tools (like Dynatrace, DataDog, or AWS CloudWatch) will also make you feel right at home.

About Squiz

Our mission is to empower organisations to create exceptional digital experiences that engage users, drive growth and build deeper relationships. Our long-term ambition is to redefine the digital experience landscape and become the platform of choice for enterprises pursuing customer-first digital transformation.

You'll join a company that's evolving quickly, investing heavily in modern AI-powered products, and competing in a space that's becoming increasingly important.

You'll work with some of the most intelligent and down to earth people you'll ever meet: we are made up of a diverse range of passionate people who love challenging the status quo. Every day is different, but what is constant is we enjoy what we do.