Our ‘black belt’ specialists are leaders in their domains: digital champions, delivery-focused experts, top-tier security professionals, AI thought leaders, and engineering best practice advocates.

With a global footprint and deep local insight, Software at Scale delivers cutting-edge technology solutions that power mission-critical platforms. We solve complex engineering challenges at scale, driving quality, performance, and resilience through the strength of our people.

The Role & The Challenge

We are seeking an exceptional, highly proactive Senior Java Engineer who thrives in a high-trust, fully empowered environment. This is a purely hands-on execution role for a seasoned technologist who possesses deep internal knowledge of the modern Java ecosystem.

A critical focus of this mandate is building and optimising Software as a Service (SaaS) platforms designed to scale out horizontally.

We do not micromanage, nor do we hand out pre-packaged answers. You will step into an environment where you are expected to take complete technical ownership, architect high-throughput distributed systems, and navigate complex enterprise constraints.

You are not just a solo brilliant coder; you are a foundational team player. You will lead by example, establishing engineering baselines, and naturally providing the technical mentorship needed to lift the engineering capabilities of the squads around you.

Key Responsibilities

- SaaS Architecture & Scale-Out: Architect, build, and optimise multi-tenant SaaS platforms, ensuring the architecture can dynamically and horizontally scale out to handle massive concurrency and data volume.
- API Engineering: Design and build high-performance, resilient RESTful APIs and event-driven microservices using modern Java frameworks.
- Technical Leadership & Team Uplift: Actively mentor and elevate mid-level engineers through collaborative code reviews, pair programming, and architectural whiteboard sessions.
- Java Ecosystem Development:



Utilise the latest Java LTS releases and enterprise frameworks (specifically Spring Boot and Spring AI) alongside robust build tools (Maven or Gradle).
- DevOps & Testing: Develop and maintain frictionless CI/CD pipelines. Implement rigorous automated testing (JUnit, Mockito) and containerised workflows using Docker.
- Cloud-Native Deployment: Leverage AWS-native services to deploy reliable, horizontally scalable Java applications.
- AI Tooling Adoption: Champion the adoption of GenAI and agentic tools where they tangibly improve engineering productivity, code quality, or system capability.
- Observability: Apply observability best practices using up-to-date monitoring, logging, and tracing tools to proactively manage system performance and identify bottlenecks.

What You Bring

- SaaS Scaling Expertise: Mandatory commercial experience designing and engineering Software as a Service (SaaS) platforms that are explicitly built to scale out horizontally under heavy load.
- Java Mastery: Deep, hands-on expertise in modern Java (e.g., Java 17 or 21). You understand the JVM internals, memory management, and concurrency.
- Frameworks & Build Tools: Extensive commercial experience with the Spring ecosystem (Spring Boot, Spring Data, and ideally Spring AI), alongside mastery of Maven or Gradle.
- Proactive Execution: A proven history of hunting down answers, researching architectural trade-offs independently, and proposing fully formed solutions rather than waiting for top-down direction.
- Cloud & CI/CD: Experience deploying and operating Java workloads on AWS, managing CI/CD pipelines, and working with Docker containers.
- Communication: Strong communication skills and a collaborative, execution-driven approach to solving enterprise problems.

What We Offer

- Meaningful, hands-on engineering work across complex, enterprise-grade SaaS platforms.
- Clear growth pathways from Senior to Staff and beyond.
- A low-ceremony, delivery-focused environment that values engineers who own outcomes.
- Competitive remuneration and benefits.
- The opportunity to work alongside highly experienced engineers on challenging, high-impact systems.

📌 Senior Java Engineer – Perm or Contract (Sydney)
🏢 Software@Scale
📍 Sydney