Senior MERN Stack Developer

About the job

Job description Experience : 4-5 Years Job Type : Full-time About Katonic : We are a young Australian generative AI startup headquartered in Sydney, Australia. Job Description : We are seeking a highly skilled Senior MERN Stack Developer with 4-5 years of experience to design and build the core application layers of our enterprise-grade GenAI and LLMOps platform. You will bridge the gap between our responsive frontend and our robust AI backend. Key Responsibilities : • Design and develop scalable web applications using the MERN stack (MongoDB, Express.js, React.js, Node.js). • Integration & Orchestration : Act as the bridge between the UI and the backend / AI team; build the Node.js middleware that consumes existing Python / FastAPI microservices and serves data to the frontend. • Build intuitive React interfaces for GenAI features, including real-time chat, prompt playgrounds, and dashboards. • Implement real-time data handling using WebSockets / SSE to stream LLM tokens from the backend to the user. • Collaborate with Backend and AI Engineers to define and consume API contracts (REST / gRPC) for model serving and RAG pipelines. • Optimize front-end performance and state management (Redux / Context API) to handle complex JSON outputs from AI models. • Write clean, maintainable code with unit and integration tests to ensure the "glue" between systems is robust.

Requirements

• MERN stack
• Node.js
• React.js
• JavaScript
• TypeScript
• API Integration
• WebSockets
• Redux
• Docker

Preferred Technologies

• MERN stack
• Node.js
• React.js
• JavaScript
• TypeScript
• API Integration
• WebSockets
• Redux
• Docker

Benefits

• Opportunity to build the application layer for a cutting-edge GenAI & LLMOps ecosystem.
• Work with advanced LLMs, GPUs, embeddings, and multimodal AI technologies.
• Collaborative environment with engineering, AI / ML research, DevOps, and product teams.

About the company

Katonic AI is a young Australian generative AI startup headquartered in Sydney, Australia, focused on building advanced LLMs and AI solutions.