senior java software engineer jobs in Sydney

We are looking for an experienced Senior Software Engineer to join our team on an initial 3-month contract to support, maintain and further develop an existing SaaS application. This is a hands-on technical role requiring a minimum of 5 years’ relevant commercial software engineering experience, with a strong focus on backend systems, data integrity,...

UpGuard is hiring a Senior Software Engineer to own a feature area within our Product Engineering team. You will design, implement and productionize key capabilities, mentoring engineers and shaping what we ship for customers who rely on us to understand cybersecurity risk.You'll work with React/TypeScript on the frontend and Go services with Postgres on...

Commonwealth Bank’s AI Venturing Pod is seeking senior-to-principal software engineers to ship AI-powered products across a portfolio of ventures. This role spans discovery to production, balancing product judgment with deep engineering across diverse codebases and stacks.You’ll own outcomes end-to-end, adapt across ventures, and extend AI-native...

Advanced Navigation is the world’s most determined innovator in AI robotics and navigation technologies across land, air, sea and space applications.Founded on a culture of research and discovery, Advanced Navigation's mission is to be the catalyst of the autonomy revolution. Fields of expertise include artificial intelligence, underwater sonar, GNSS,...

MongoDB in Sydney is growing the App Analysis & Modelling team to deliver code analysis, schema recommendations, and AI-powered insights that help customers modernise applications. You will help build scalable backend services and APIs while collaborating with product and design to ship cutting‑edge features.The role suits mid (3–5+ yrs) or senior (5+...

Fair Supply, Sydney-based startup, is seeking a Senior Software Engineer to own complex, data-heavy features across our Next.js/TypeScript stack and the underlying data layer. You’ll take problems from rough idea to production, shape architecture, and ensure code quality in a small, autonomous team.You’ll work with AI-first tooling, graph databases, and...

Optiver is seeking a Senior Software Engineer to join Critical Engineering APAC in Sydney. You will design, build and operate components of the APAC platform, writing production-grade C++ for real-time, low-latency services.You will set technical direction and collaborate across domains to deliver resilient trading systems. The role requires 5+ years in...

Amazon is seeking experienced Software Development Engineers to support the AWS Region Services initiative. You will help design and manage compute, database, storage, IoT, platform and productivity services, including secure cloud solutions, across AWS regions.Join a team redefining how AWS designs, builds, and operates regions to enable new cloud...

ShiftCare is seeking a Software Engineer – Integrations to work remotely with our growing engineering team. You will design and implement integration points with third-party platforms, APIs and microservices to extend our SaaS ecosystem. The role emphasizes high quality delivery in an Agile/DevOps environment and hands-on coding across backend and...

Leaders IT in Sydney is seeking an experienced Java software engineer to design, build, and operate microservices-driven solutions. You’ll contribute across the full delivery lifecycle, from design through documentation to production support, ensuring security and quality standards. You will work with Spring/Spring Boot, cloud-native services...

Company DescriptionNine is Australia’s largest locally owned media company. We are home to premium, trusted news, sport and entertainment. Nine's assets span free-to-air television, free and paid streaming, publishing and digital audio, and digital outdoor and retail media. Our content reaches almost every Australian - meaning what we do has real impact....

Senior Software Engineer, Android Site Reliability Engineering Google Sydney NSW, Australia Mid Experience driving progress, solving problems, and mentoring more junior team members; deeper expertise and applied knowledge within relevant area. Bachelor’s degree in Computer Science, a related field, or equivalent practical experience. 5 years of experience...

Anduril Industries is a defense technology company with a mission to transform U.S. and allied military capabilities with advanced technology. By bringing the expertise, technology, and business model of the 21st century’s most innovative companies to the defense industry, Anduril is changing how military systems are designed, built and sold. Anduril’s...

Abby Health is Australia’s busiest online clinic, delivering same‑day online primary care. You will own work across the platform—patient app, clinician portal, internal tooling, mobile apps and the API—reporting to the CTO with high autonomy.This is a Sydney‑based role in the office, focusing on delivering reliable, patient‑centred care. We ship...

SchoolHouse, partnering with a Western Sydney K–12 Christian school, seeks a TAS Teacher (Software Engineering/Computer Science) for a full-time, permanent role commencing Term 1, 2027. The position requires the ability to teach either Software Engineering or Computer Science and supports a values-based education in a coeducational setting. The school...

Domain is seeking a Senior Software Engineer - CRE to join a tight-knit team building the commercial real estate platform. You will design, build, and evolve the technology powering Domain’s CRE marketplace, delivering scalable and reliable solutions in a cloud-native environment.You’ll work closely with Product, Design and Engineering peers to drive...

LEAP Dev, the software house powering LEAP Legal Software, invites a Senior Software Engineer to join the Core Product team in Sydney. You will design, build, and maintain backend services in C#/.NET with significant React-based frontend work.You’ll craft RESTful APIs, drive integrations, and contribute to scalable, event-driven architectures in a...

Constantinople delivers a new era of AI-native banking. Constantinople provides banks with a fully-managed software and AI operational platform, which brings together customer experience, product, data, operations, compliance and infrastructure in a single platform.Constantinople’s AI-native platform eliminates the need for expensive infrastructure, and...

Space Machines Company in Sydney, Australia seeks a Senior Flight Software/Firmware Engineer to own the end‑to‑end development from requirements to real‑hardware validation. You will drive firmware for control units, interface with hardware, and integrate multiple spacecraft subsystems using CAN, RS-422/485 and Ethernet. You will work across hardware...

Mirvac is a brand that creates and curates better experiences. We are more than developers or builders – we are visionaries, driven to see the world differently and embrace innovation, diversity, and optimism. Join us as we work towards building the imagine nation. The Opportunity We are looking for a Software Engineer to join our Digital team and play a...