Top Full Stack Developer Jobs in Sydney

Develop and maintain enterprise-grade C# and .NET applications, RESTful APIs, event-driven microservices, and distributed systems on AWS. Design PostgreSQL schemas, optimize queries, and support high-volume workloads across the full software development lifecycle. Collaborate with product owners and architects while meeting compliance, security, resiliency, and service-level requirements. Use and evaluate AI-assisted development tools responsibly for coding, testing, refactoring, documentation, and automation.

Build end-to-end full stack trading applications for options: modern React frontends, distributed backend services (C++/Python), real-time data pipelines, trading and risk visualization, and tooling used directly by traders and researchers.

Design, develop, test, and deploy full-stack web applications and APIs to support investment management, portfolio operations, reporting, and business workflows. Build backend services, optimise SQL and database performance, integrate systems via APIs, contribute to cloud modernization, participate in architecture and code reviews, and improve application performance, security, and maintainability while collaborating with product and investment teams.

Build full-stack, low-latency trading and pricing tools for options traders. Collaborate with traders, researchers, and business stakeholders to design intuitive frontends and scalable backend services, prototype and productionize distributed systems, and expand trading capabilities globally while improving performance, stability, and usability.

The Senior Full Stack Engineer will design and operate scalable services and APIs for an AI compliance platform, making high-impact technical decisions and influencing engineering culture.

The Senior Full Stack Engineer will design, architect, and build integrations for enterprise compliance platforms, ensuring the integration layer connects seamlessly with tools like Salesforce and Microsoft. Responsibilities include making technical decisions, implementing APIs, and contributing to engineering culture as the team grows.

Own end-to-end delivery of AI-enabled products from proof of concept through production. Design and connect backend, data, and frontend systems; solve ambiguous client problems; lead workshops and technical discussions; and make pragmatic trade-offs while iterating based on user feedback. The role requires approximately 5–8+ years of product or systems engineering experience, strong AI delivery experience, full-stack capability, client communication skills, and senior-level autonomy.

Join a small cross-functional team to build a 0➜1 product. Work across the full stack from design to deployment, architect scalable infrastructure, implement engineering best practices, ensure security, reliability and performance, and collaborate closely with founders to rapidly deliver customer-focused features.

Develop, maintain and support a modular satellite imagery platform. Extend and implement APIs, server-side rendered web interfaces, troubleshoot customer deployments, mentor developers, and collaborate with multidisciplinary teams to design and deliver new platform features and improvements for earth observation operations.

Build high-performance, scalable React+TypeScript web applications for payment experiences. Design reusable UI components and optimize frontend performance while collaborating with cross-functional teams on architecture, testing, accessibility, and product delivery.

Join a small cross-functional product engineering team building Clipboard. Deliver well-scoped features from ticket to production, write and review tested code, use feature flags for incremental delivery, document decisions, work with AI tooling, participate in code reviews, and help triage production issues with support.

Develop full-stack web interfaces and backend architecture for neurotechnology applications; implement neural signal processing pipelines (EEG), integrate machine learning models for neurophysiological data analysis, maintain acquisition/processing software, participate in code reviews, document technical processes, and work independently within a small, research-driven startup.

Design and maintain Binance's login, registration, and account-security experiences across web and mobile. Build an in-house AI facial-recognition KYC product, integrate authentication flows (passkeys/FIDO2, MFA), develop Node.js server-side and BFF layers, publish shared SDKs, optimize performance and observability, and drive product improvements using data.

Develop and maintain consumer-facing property management software. Collaborate with Product, design and implement APIs and front-end features, write tests and high-quality code, review PRs, and apply Lean/Agile practices.

Own and ship end-to-end product surfaces using Next.js/TypeScript and FastAPI/Python. Raise frontend quality, optimize performance for data-dense UIs (3D playback, time-series, maps), build mobile-friendly dashboards, and implement backend APIs, data models, and jobs. Iterate quickly with customers and own outcomes.

Join the API and Integrations team to build and maintain front-end focused full‑stack features using C#/.NET and JavaScript/TypeScript frameworks. Design, implement, test, and deploy reliable web APIs and interactive UIs, collaborate in agile teams, use data and AI tools thoughtfully, and own feature outcomes and operational quality.

Join Freelancer as a Full-Stack Software Engineer to tackle diverse engineering challenges across a global platform while building your skills in a meritocratic environment.

Join Escrow.com as a Senior Full Stack Software Engineer, tackling complex web applications and scalable features with diverse tech using Python, React.js, and AWS.

Senior developer responsible for driving development of MYOB's SaaS platform, building web services and integrations, deploying cloud solutions (Azure/AWS), implementing TDD, DevOps, event-driven architecture and CI/CD, and collaborating with the Data & AI team to deliver AI-powered features and scalable, resilient systems.

Join as an early-career full stack engineer to build frontend and backend product features, integrate AI coding tools into development workflows, translate product requirements into implementations, and grow toward autonomous full stack delivery while improving cross-team processes.

Build and maintain scalable full-stack web applications using React, Next.js, Node.js, and Express. Develop APIs, database integrations, authentication, payment flows, AI agents, automated tests, and caching strategies. Deploy applications to Vercel or cloud platforms, debug and optimize systems, participate in architecture discussions and code reviews, and own features from planning through production. The role requires independent remote work, collaboration with product and engineering teams, and effective use of AI-assisted coding tools.

Design, build, and maintain Android-first client applications for an instant messaging platform. Implement real-time chat, media messaging, offline sync, push notifications, and performance optimizations. Collaborate on client architecture across Android, iOS, and Web, integrate APIs and real-time protocols, debug cross-stack issues (with AI tools), and mentor junior engineers at senior level.

Build and ship end-to-end product features across frontend, backend, APIs and databases for an AI Neobank. Create customer and internal workflows (onboarding, accounts, payments, rewards, FX, KYC, support automation), build internal tools, collaborate with product/design/mobile/AI teams, and own production monitoring, debugging and improvement post-release.

Lead technical delivery and client-facing workstreams, guide and code with teams using TDD, CI, and DevSecOps; design pragmatic solutions, mentor engineers, and ensure high-quality continuous delivery from ideation to production.

Develop UI and APIs, integrate front end with Bigtincan backend, implement authentication, work on SOA/microservices, participate in code reviews, maintain Jira tickets, and contribute to sprint planning and retrospectives.