Senior Full Stack Engineer - AI / Conversational Systems

Job description

We are seeking a Senior Full Stack Engineer specializing in AI and Conversational Systems to join our engineering organization in Sydney. In this hands-on role, you will design, build, and operate production-grade conversational interfaces and generative AI features—including AI Coach solutions, real-time CoPilot streaming experiences, and intelligent agent workflows. You will bridge advanced AI tooling (Vertex AI, Dialogflow CX, AgentStudio) with modern frontend and backend architectures (React, WebSockets, Node.js, Java) while applying rigorous engineering practices to handle non-deterministic model behaviour. Key Responsibilities Conversational & Generative AI Development: Design and build intelligent agent workflows, conversational flows, and generative AI features using Dialogflow CX, Vertex AI, AgentStudio , and advanced prompt/context engineering techniques. Real-Time AI Frontend Engineering: Develop high-performance, responsive user interfaces using React, Vite, Tailwind CSS, and Storybook , integrating WebSockets for real-time conversational and CoPilot streaming capabilities. Backend & API Integration: Build and maintain scalable backend services and API layers (Node.js/TypeScript, Java, Apigee) to support secure, low-latency communication between front-end applications and AI model providers. AI Quality & Testing Engineering: Implement robust evaluation, testing, and monitoring frameworks for AI-enabled features—focusing on accuracy, response latency, guardrails, prompt regression, and handling non-deterministic model behaviour. Cross-Functional Collaboration: Partner with product managers, AI architects, UX designers, and platform engineers to deliver secure, production-ready AI capabilities at enterprise scale. Essential Experience: Production AI Experience: Demonstrated track record of building and operating conversational or generative AI features in live production environments. Conversational & LLM Platforms: Hands-on experience with at least one major conversational AI platform (e.g., Dialogflow CX ) and one major LLM/ML platform (e.g., Vertex AI ). Full Stack Core Stack: Deep production experience across React, Node.js/TypeScript, and Java , alongside real-time communication protocols like WebSockets. AI Evaluation & Testing: Proven capability in evaluating and testing AI-enabled features rather than only traditional deterministic code (measuring model accuracy, latency, guardrails, and prompt regression). Location: Sydney-based (or willing to work hybrid in Sydney) with full Australian working rights. Desirable: Experience working with agentic frameworks, prompt/context optimization patterns, or specialized UI component libraries for AI apps. Familiarity with secure enterprise API gateways (Apigee) and cloud-native deployment patterns on Google Cloud Platform. Why NCS? This is a place for people who like to get stuck in, bring ideas to life and make things happen. You'll work alongside experienced people who care about what they do, contribute to meaningful work and have the support to keep learning and grow your career. Whether you want to deepen your expertise, explore something new or take your career in a different direction, there's room to make it your own. We value Adventure, Excellence, Integrity, Ownership and Unity - bringing curiosity, collaboration and accountability to the way we work with our clients and each other. Ready to make extraordinary happen? We'd love to hear from you. We celebrate diversity and inclusion We value different perspectives, experiences and strengths our people bring. We're committed to an inclusive workplace where everyone has the opportunity to contribute, grow and succeed, and to providing equal employment opportunities and reasonable adjustments throughout the recruitment process. Important information Applicants will need valid Australian work rights and may be required to undergo relevant background, probity and police checks. Agencies: NCS accepts candidate submissions only from agencies on our preferred supplier panel through the NCS Agency Portal. At NCS Australia, we believe in doing technology services better. Our commitment to quality, focus on people, and willingness to challenge traditional thinking set us apart. Our team brings this belief to life by partnering with our clients and communities to make tomorrow together. We are committed to creating an environment that prioritises innovation, collaboration, and purposeful work. Our diverse team is empowered to make a meaningful impact with curiosity, creativity and resilience to shape better outcomes. Join us and accept the challenge of creating a better tomorrow.