Top Software Engineer Jobs in Sydney

Develop, test, maintain, and verify embedded software for medical devices used in diagnosis, monitoring, and treatment. Collaborate with software, hardware, systems, quality, product, and clinical teams on architecture, requirements, troubleshooting, documentation, and defect resolution. Contribute to Agile delivery, automated testing, CI/CD, process improvement, and technical workstream leadership while ensuring reliable, high-quality software.

Lead quality engineering for membership and loyalty capabilities, designing and executing functional, integration, API, contract, automation, and end-to-end tests. Build reliable test suites, validate loyalty points and personalized recommendations, manage test data, ensure cross-browser and cross-device quality, define testing strategies, and improve coverage using AI-assisted tools. Collaborate with engineering and product teams throughout the software development lifecycle while leading quality engineers in the loyalty and personalization area.

Develop and support scalable Java and Spring Boot backend microservices powering omnichannel inventory availability, order promising, allocation, fulfilment, and post-purchase experiences. Build event-driven processing with Kafka, integrate OMS, WMS, ERP, commerce, and fulfilment platforms, and ensure services are secure, observable, reliable, and performant. Own features from design through production, write tested code, participate in reviews, troubleshoot production issues, and improve operational efficiency.

Designs, automates, and executes functional, integration, API, contract, regression, concurrency, and performance tests for inventory, order promising, sourcing, and fulfillment platforms. Investigates defects, validates fixes, maintains regression coverage, integrates quality tests into CI/CD pipelines, and supports release readiness. The role collaborates with product and engineering teams to validate distributed commerce systems, integrations, business rules, data consistency, scalability, resilience, and consumer-impacting workflows.

Design, implement, and deliver mission-critical low-latency trading systems in modern C++ on Linux. Build scalable services, participate in Agile development, design sessions, and code reviews, and collaborate with traders and quantitative researchers. Troubleshoot complex issues across teams while applying distributed systems, algorithms, data structures, object-oriented design, and multithreaded programming.

Leads the full lifecycle of medium-sized software projects, including architecture, development, testing, deployment, production support, and continuous improvement. Writes and reviews secure, production-ready code, resolves technical issues, mentors junior engineers, and collaborates with product owners and cross-functional teams. The role focuses on digital marketing and audience amplification platforms using modern cloud, microservices, event-driven, frontend, database, DevOps, and application security technologies.

Develop, test, deploy, and operate machine learning pipelines and AI products using Python, SQL, cloud platforms, and infrastructure-as-code tools. Build generative AI and traditional ML solutions, prototype proofs of concept, analyze data quality and coverage, and support dashboards and reporting. The role follows agile engineering practices, including test-driven development, continuous delivery, pair programming, and shared DevOps ownership.

Design, develop, test, deploy, and monitor production web and mobile applications using React and React Native. Apply AI-enabled practices across the SDLC, including requirements, coding, testing, code review, CI/CD, monitoring, and incident triage. Own features end-to-end, contribute to scalable architecture, optimize performance and accessibility, evaluate AI tools, improve engineering workflows, and mentor junior engineers.

Lead the greenfield development of Challenger’s React digital platform. Own React architecture, engineering standards, reusable component libraries, API and BFF integrations, CI/CD pipelines, quality controls, security, performance, accessibility and observability. Provide hands-on coding, code reviews and technical leadership while influencing internal teams and delivery partners. Collaborate with Product, Architecture, Design, Security and Accenture teams to establish scalable digital portal foundations and grow internal React capability.

Leads technical solution design and software delivery for payments, settlements, and disputes platforms. Provides hands-on engineering support, code reviews, technical mentoring, risk resolution, release planning, and roadmap input. Establishes development, testing, CI/CD, DevOps, security, resilience, and operational practices while supporting incident reviews and defect prioritization. Partners with product, architecture, and delivery teams to build scalable solutions and uplift engineering capability.

Build and maintain full-stack software for Campaign Monitor across microservices, APIs, dynamic web applications, AWS infrastructure, and event-streaming systems. Partner with product managers, UX designers, and engineers to shape architecture, deliver scalable customer experiences, review code, mentor teammates, and support production systems through on-call participation. The role requires end-to-end ownership, including technical scoping, tradeoffs, quality, security, and long-term maintainability.

Software Engineers at Citadel develop, maintain, and support high-performance trading platforms, focusing on custom software solutions and system stability.

The Full Stack Software Engineer will develop, integrate, and deploy AI technologies, focusing on building scalable web applications and ensuring a great user experience.

Develop and deliver core EOS networking features in C/C++ and Python. Write specs, design documents, and automated tests. Collaborate with product, customers, and support to triage and resolve network issues. Provide technical leadership and mentor junior engineers from design through deployment.

Build and maintain customer-facing and internal web applications (Megaport Portal) using a modern frontend stack. Implement features with Vue 3/TypeScript, ensure accessibility and responsive design, integrate web services, improve architectures and processes, and write unit/integration/end-to-end tests using Playwright and Vitest.

Design and build distributed systems for a high-performance CI/CD execution platform. Responsibilities include orchestrating Supabase Branch lifecycle operations, provisioning ephemeral sandboxed environments on AWS, scheduling concurrent builds, optimizing pipelines through caching and artifact reuse, handling retries and failures, instrumenting observability, and developing configuration and infrastructure integrations. The role requires strong Go and TypeScript skills, cloud infrastructure experience, and a production operations mindset.

Lead design and delivery of scalable, reliable backend services for Azure infrastructure. Own distributed-system design, implementation, testing, and operations. Drive incident response, on-call rotations, observability, automation, code reviews, and mentor engineers to improve reliability and operational excellence.

First dedicated site reliability engineer responsible for owning reliability, observability, incident response, and platform decisions. Projects include improving uptime and RTO, hardening GPU clusters, implementing metrics/tracing/alerting and SLOs, and optimizing AWS infrastructure and cloud spend while enabling CI/CD and deployment pipelines.

Own backend-heavy full-stack product surfaces from architecture and delivery through production operations. Responsibilities may include answer retrieval and verification, identity and billing, public APIs, integrations, and AI-powered workflows. The role requires operational ownership, observability, performance management, incident response, clear written communication, and close product collaboration. The engineer will work remotely from Sydney with the New Zealand engineering team.

Assist in designing, developing, and testing software applications while collaborating with senior developers on various projects. Gain hands-on experience in software development and exposure to programming languages and tools.

As a Founding Engineer, you'll own core product and infrastructure decisions, building scalable software and transformative AI solutions for millions of users.

Build and ship native Android features using Kotlin and modern Android architecture. Collaborate with product and design to create clean financial user journeys, integrate backend APIs, improve performance and reliability, use analytics and debugging to reduce crashes, and implement AI-assisted on-device experiences with TensorFlow Lite where beneficial.

Responsible for architecture, development, and validation of firmware/software for AI inference on multiprocessor SoCs, ensuring runtime performance. Collaborate with hardware teams and deliver quality code.

Design and implement AI/ML-driven developer tools and features for an unpublished R&D game. Architect tooling ecosystems, collaborate with cross-disciplinary teams, mentor engineers, and deploy production-ready AI/ML solutions that improve developer workflows and player experiences.

Lead development of internal AI-driven security tools and automation, support incident response with threat-hunting and remediation tooling, maintain Kubernetes/serverless infrastructure and large-scale log/ETL pipelines, identify automation opportunities with engineering teams, drive security outcomes (patching, gateways), and mentor junior engineers.